primitives: classify primitives.

lib/blockchain/chainentry.js

@@ -19,18 +19,15 @@ const InvItem = require('../primitives/invitem');
 const ZERO = new BN(0);
 
 /**
+ * Chain Entry
  * Represents an entry in the chain. Unlike
  * other bitcoin fullnodes, we store the
  * chainwork _with_ the entry in order to
  * avoid reading the entire chain index on
  * boot and recalculating the chainworks.
  * @alias module:blockchain.ChainEntry
- * @constructor
- * @param {Object?} options
  * @property {Hash} hash
- * @property {Number} version - Transaction version. Note that Bcoin reads
- * versions as unsigned even though they are signed at the protocol level.
- * This value will never be negative.
+ * @property {Number} version
  * @property {Hash} prevBlock
  * @property {Hash} merkleRoot
  * @property {Number} time
@@ -38,25 +35,331 @@ const ZERO = new BN(0);
  * @property {Number} nonce
  * @property {Number} height
  * @property {BN} chainwork
- * @property {ReversedHash} rhash - Reversed block hash (uint256le).
+ * @property {ReversedHash} rhash
  */
 
-function ChainEntry(options) {
-  if (!(this instanceof ChainEntry))
-    return new ChainEntry(options);
+class ChainEntry {
+  /**
+   * Create a chain entry.
+   * @constructor
+   * @param {Object?} options
+   */
 
-  this.hash = encoding.NULL_HASH;
-  this.version = 1;
-  this.prevBlock = encoding.NULL_HASH;
-  this.merkleRoot = encoding.NULL_HASH;
-  this.time = 0;
-  this.bits = 0;
-  this.nonce = 0;
-  this.height = 0;
-  this.chainwork = ZERO;
+  constructor(options) {
+    this.hash = encoding.NULL_HASH;
+    this.version = 1;
+    this.prevBlock = encoding.NULL_HASH;
+    this.merkleRoot = encoding.NULL_HASH;
+    this.time = 0;
+    this.bits = 0;
+    this.nonce = 0;
+    this.height = 0;
+    this.chainwork = ZERO;
 
-  if (options)
-    this.fromOptions(options);
+    if (options)
+      this.fromOptions(options);
+  }
+
+  /**
+   * Inject properties from options.
+   * @private
+   * @param {Object} options
+   */
+
+  fromOptions(options) {
+    assert(options, 'Block data is required.');
+    assert(typeof options.hash === 'string');
+    assert((options.version >>> 0) === options.version);
+    assert(typeof options.prevBlock === 'string');
+    assert(typeof options.merkleRoot === 'string');
+    assert((options.time >>> 0) === options.time);
+    assert((options.bits >>> 0) === options.bits);
+    assert((options.nonce >>> 0) === options.nonce);
+    assert((options.height >>> 0) === options.height);
+    assert(!options.chainwork || BN.isBN(options.chainwork));
+
+    this.hash = options.hash;
+    this.version = options.version;
+    this.prevBlock = options.prevBlock;
+    this.merkleRoot = options.merkleRoot;
+    this.time = options.time;
+    this.bits = options.bits;
+    this.nonce = options.nonce;
+    this.height = options.height;
+    this.chainwork = options.chainwork || ZERO;
+
+    return this;
+  }
+
+  /**
+   * Instantiate chainentry from options.
+   * @param {Object} options
+   * @param {ChainEntry} prev - Previous entry.
+   * @returns {ChainEntry}
+   */
+
+  static fromOptions(options, prev) {
+    return new this().fromOptions(options, prev);
+  }
+
+  /**
+   * Calculate the proof: (1 << 256) / (target + 1)
+   * @returns {BN} proof
+   */
+
+  getProof() {
+    const target = consensus.fromCompact(this.bits);
+
+    if (target.isNeg() || target.isZero())
+      return new BN(0);
+
+    return ChainEntry.MAX_CHAINWORK.div(target.iaddn(1));
+  }
+
+  /**
+   * Calculate the chainwork by
+   * adding proof to previous chainwork.
+   * @returns {BN} chainwork
+   */
+
+  getChainwork(prev) {
+    const proof = this.getProof();
+
+    if (!prev)
+      return proof;
+
+    return proof.iadd(prev.chainwork);
+  }
+
+  /**
+   * Test against the genesis block.
+   * @returns {Boolean}
+   */
+
+  isGenesis() {
+    return this.height === 0;
+  }
+
+  /**
+   * Test whether the entry contains an unknown version bit.
+   * @param {Network} network
+   * @returns {Boolean}
+   */
+
+  hasUnknown(network) {
+    const TOP_MASK = consensus.VERSION_TOP_MASK;
+    const TOP_BITS = consensus.VERSION_TOP_BITS;
+    const bits = (this.version & TOP_MASK) >>> 0;
+
+    if (bits !== TOP_BITS)
+      return false;
+
+    return (this.version & network.unknownBits) !== 0;
+  }
+
+  /**
+   * Test whether the entry contains a version bit.
+   * @param {Number} bit
+   * @returns {Boolean}
+   */
+
+  hasBit(bit) {
+    return consensus.hasBit(this.version, bit);
+  }
+
+  /**
+   * Get little-endian block hash.
+   * @returns {Hash}
+   */
+
+  rhash() {
+    return encoding.revHex(this.hash);
+  }
+
+  /**
+   * Inject properties from block.
+   * @private
+   * @param {Block|MerkleBlock} block
+   * @param {ChainEntry} prev - Previous entry.
+   */
+
+  fromBlock(block, prev) {
+    this.hash = block.hash('hex');
+    this.version = block.version;
+    this.prevBlock = block.prevBlock;
+    this.merkleRoot = block.merkleRoot;
+    this.time = block.time;
+    this.bits = block.bits;
+    this.nonce = block.nonce;
+    this.height = prev ? prev.height + 1: 0;
+    this.chainwork = this.getChainwork(prev);
+    return this;
+  }
+
+  /**
+   * Instantiate chainentry from block.
+   * @param {Block|MerkleBlock} block
+   * @param {ChainEntry} prev - Previous entry.
+   * @returns {ChainEntry}
+   */
+
+  static fromBlock(block, prev) {
+    return new this().fromBlock(block, prev);
+  }
+
+  /**
+   * Serialize the entry to internal database format.
+   * @returns {Buffer}
+   */
+
+  toRaw() {
+    const bw = new StaticWriter(116);
+
+    bw.writeU32(this.version);
+    bw.writeHash(this.prevBlock);
+    bw.writeHash(this.merkleRoot);
+    bw.writeU32(this.time);
+    bw.writeU32(this.bits);
+    bw.writeU32(this.nonce);
+    bw.writeU32(this.height);
+    bw.writeBytes(this.chainwork.toArrayLike(Buffer, 'le', 32));
+
+    return bw.render();
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromRaw(data) {
+    const br = new BufferReader(data, true);
+    const hash = hash256.digest(br.readBytes(80));
+
+    br.seek(-80);
+
+    this.hash = hash.toString('hex');
+    this.version = br.readU32();
+    this.prevBlock = br.readHash('hex');
+    this.merkleRoot = br.readHash('hex');
+    this.time = br.readU32();
+    this.bits = br.readU32();
+    this.nonce = br.readU32();
+    this.height = br.readU32();
+    this.chainwork = new BN(br.readBytes(32), 'le');
+
+    return this;
+  }
+
+  /**
+   * Deserialize the entry.
+   * @param {Buffer} data
+   * @returns {ChainEntry}
+   */
+
+  static fromRaw(data) {
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Serialize the entry to an object more
+   * suitable for JSON serialization.
+   * @returns {Object}
+   */
+
+  toJSON() {
+    return {
+      hash: encoding.revHex(this.hash),
+      version: this.version,
+      prevBlock: encoding.revHex(this.prevBlock),
+      merkleRoot: encoding.revHex(this.merkleRoot),
+      time: this.time,
+      bits: this.bits,
+      nonce: this.nonce,
+      height: this.height,
+      chainwork: this.chainwork.toString('hex', 64)
+    };
+  }
+
+  /**
+   * Inject properties from json object.
+   * @private
+   * @param {Object} json
+   */
+
+  fromJSON(json) {
+    assert(json, 'Block data is required.');
+    assert(typeof json.hash === 'string');
+    assert((json.version >>> 0) === json.version);
+    assert(typeof json.prevBlock === 'string');
+    assert(typeof json.merkleRoot === 'string');
+    assert((json.time >>> 0) === json.time);
+    assert((json.bits >>> 0) === json.bits);
+    assert((json.nonce >>> 0) === json.nonce);
+    assert(typeof json.chainwork === 'string');
+
+    this.hash = encoding.revHex(json.hash);
+    this.version = json.version;
+    this.prevBlock = encoding.revHex(json.prevBlock);
+    this.merkleRoot = encoding.revHex(json.merkleRoot);
+    this.time = json.time;
+    this.bits = json.bits;
+    this.nonce = json.nonce;
+    this.height = json.height;
+    this.chainwork = new BN(json.chainwork, 'hex');
+
+    return this;
+  }
+
+  /**
+   * Instantiate block from jsonified object.
+   * @param {Object} json
+   * @returns {ChainEntry}
+   */
+
+  static fromJSON(json) {
+    return new this().fromJSON(json);
+  }
+
+  /**
+   * Convert the entry to a headers object.
+   * @returns {Headers}
+   */
+
+  toHeaders() {
+    return Headers.fromEntry(this);
+  }
+
+  /**
+   * Convert the entry to an inv item.
+   * @returns {InvItem}
+   */
+
+  toInv() {
+    return new InvItem(InvItem.types.BLOCK, this.hash);
+  }
+
+  /**
+   * Return a more user-friendly object.
+   * @returns {Object}
+   */
+
+  inspect() {
+    const json = this.toJSON();
+    json.version = json.version.toString(16);
+    return json;
+  }
+
+  /**
+   * Test whether an object is a {@link ChainEntry}.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
+
+  static isChainEntry(obj) {
+    return obj instanceof ChainEntry;
+  }
 }
 
 /**
@@ -66,307 +369,6 @@ function ChainEntry(options) {
 
 ChainEntry.MAX_CHAINWORK = new BN(1).ushln(256);
 
-/**
- * Inject properties from options.
- * @private
- * @param {Object} options
- */
-
-ChainEntry.prototype.fromOptions = function fromOptions(options) {
-  assert(options, 'Block data is required.');
-  assert(typeof options.hash === 'string');
-  assert((options.version >>> 0) === options.version);
-  assert(typeof options.prevBlock === 'string');
-  assert(typeof options.merkleRoot === 'string');
-  assert((options.time >>> 0) === options.time);
-  assert((options.bits >>> 0) === options.bits);
-  assert((options.nonce >>> 0) === options.nonce);
-  assert((options.height >>> 0) === options.height);
-  assert(!options.chainwork || BN.isBN(options.chainwork));
-
-  this.hash = options.hash;
-  this.version = options.version;
-  this.prevBlock = options.prevBlock;
-  this.merkleRoot = options.merkleRoot;
-  this.time = options.time;
-  this.bits = options.bits;
-  this.nonce = options.nonce;
-  this.height = options.height;
-  this.chainwork = options.chainwork || ZERO;
-
-  return this;
-};
-
-/**
- * Instantiate chainentry from options.
- * @param {Object} options
- * @param {ChainEntry} prev - Previous entry.
- * @returns {ChainEntry}
- */
-
-ChainEntry.fromOptions = function fromOptions(options, prev) {
-  return new ChainEntry().fromOptions(options, prev);
-};
-
-/**
- * Calculate the proof: (1 << 256) / (target + 1)
- * @returns {BN} proof
- */
-
-ChainEntry.prototype.getProof = function getProof() {
-  const target = consensus.fromCompact(this.bits);
-
-  if (target.isNeg() || target.isZero())
-    return new BN(0);
-
-  return ChainEntry.MAX_CHAINWORK.div(target.iaddn(1));
-};
-
-/**
- * Calculate the chainwork by
- * adding proof to previous chainwork.
- * @returns {BN} chainwork
- */
-
-ChainEntry.prototype.getChainwork = function getChainwork(prev) {
-  const proof = this.getProof();
-
-  if (!prev)
-    return proof;
-
-  return proof.iadd(prev.chainwork);
-};
-
-/**
- * Test against the genesis block.
- * @returns {Boolean}
- */
-
-ChainEntry.prototype.isGenesis = function isGenesis() {
-  return this.height === 0;
-};
-
-/**
- * Test whether the entry contains an unknown version bit.
- * @param {Network} network
- * @returns {Boolean}
- */
-
-ChainEntry.prototype.hasUnknown = function hasUnknown(network) {
-  const TOP_MASK = consensus.VERSION_TOP_MASK;
-  const TOP_BITS = consensus.VERSION_TOP_BITS;
-  const bits = (this.version & TOP_MASK) >>> 0;
-
-  if (bits !== TOP_BITS)
-    return false;
-
-  return (this.version & network.unknownBits) !== 0;
-};
-
-/**
- * Test whether the entry contains a version bit.
- * @param {Number} bit
- * @returns {Boolean}
- */
-
-ChainEntry.prototype.hasBit = function hasBit(bit) {
-  return consensus.hasBit(this.version, bit);
-};
-
-/**
- * Get little-endian block hash.
- * @returns {Hash}
- */
-
-ChainEntry.prototype.rhash = function rhash() {
-  return encoding.revHex(this.hash);
-};
-
-/**
- * Inject properties from block.
- * @private
- * @param {Block|MerkleBlock} block
- * @param {ChainEntry} prev - Previous entry.
- */
-
-ChainEntry.prototype.fromBlock = function fromBlock(block, prev) {
-  this.hash = block.hash('hex');
-  this.version = block.version;
-  this.prevBlock = block.prevBlock;
-  this.merkleRoot = block.merkleRoot;
-  this.time = block.time;
-  this.bits = block.bits;
-  this.nonce = block.nonce;
-  this.height = prev ? prev.height + 1: 0;
-  this.chainwork = this.getChainwork(prev);
-  return this;
-};
-
-/**
- * Instantiate chainentry from block.
- * @param {Block|MerkleBlock} block
- * @param {ChainEntry} prev - Previous entry.
- * @returns {ChainEntry}
- */
-
-ChainEntry.fromBlock = function fromBlock(block, prev) {
-  return new ChainEntry().fromBlock(block, prev);
-};
-
-/**
- * Serialize the entry to internal database format.
- * @returns {Buffer}
- */
-
-ChainEntry.prototype.toRaw = function toRaw() {
-  const bw = new StaticWriter(116);
-
-  bw.writeU32(this.version);
-  bw.writeHash(this.prevBlock);
-  bw.writeHash(this.merkleRoot);
-  bw.writeU32(this.time);
-  bw.writeU32(this.bits);
-  bw.writeU32(this.nonce);
-  bw.writeU32(this.height);
-  bw.writeBytes(this.chainwork.toArrayLike(Buffer, 'le', 32));
-
-  return bw.render();
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
-
-ChainEntry.prototype.fromRaw = function fromRaw(data) {
-  const br = new BufferReader(data, true);
-  const hash = hash256.digest(br.readBytes(80));
-
-  br.seek(-80);
-
-  this.hash = hash.toString('hex');
-  this.version = br.readU32();
-  this.prevBlock = br.readHash('hex');
-  this.merkleRoot = br.readHash('hex');
-  this.time = br.readU32();
-  this.bits = br.readU32();
-  this.nonce = br.readU32();
-  this.height = br.readU32();
-  this.chainwork = new BN(br.readBytes(32), 'le');
-
-  return this;
-};
-
-/**
- * Deserialize the entry.
- * @param {Buffer} data
- * @returns {ChainEntry}
- */
-
-ChainEntry.fromRaw = function fromRaw(data) {
-  return new ChainEntry().fromRaw(data);
-};
-
-/**
- * Serialize the entry to an object more
- * suitable for JSON serialization.
- * @returns {Object}
- */
-
-ChainEntry.prototype.toJSON = function toJSON() {
-  return {
-    hash: encoding.revHex(this.hash),
-    version: this.version,
-    prevBlock: encoding.revHex(this.prevBlock),
-    merkleRoot: encoding.revHex(this.merkleRoot),
-    time: this.time,
-    bits: this.bits,
-    nonce: this.nonce,
-    height: this.height,
-    chainwork: this.chainwork.toString('hex', 64)
-  };
-};
-
-/**
- * Inject properties from json object.
- * @private
- * @param {Object} json
- */
-
-ChainEntry.prototype.fromJSON = function fromJSON(json) {
-  assert(json, 'Block data is required.');
-  assert(typeof json.hash === 'string');
-  assert((json.version >>> 0) === json.version);
-  assert(typeof json.prevBlock === 'string');
-  assert(typeof json.merkleRoot === 'string');
-  assert((json.time >>> 0) === json.time);
-  assert((json.bits >>> 0) === json.bits);
-  assert((json.nonce >>> 0) === json.nonce);
-  assert(typeof json.chainwork === 'string');
-
-  this.hash = encoding.revHex(json.hash);
-  this.version = json.version;
-  this.prevBlock = encoding.revHex(json.prevBlock);
-  this.merkleRoot = encoding.revHex(json.merkleRoot);
-  this.time = json.time;
-  this.bits = json.bits;
-  this.nonce = json.nonce;
-  this.height = json.height;
-  this.chainwork = new BN(json.chainwork, 'hex');
-
-  return this;
-};
-
-/**
- * Instantiate block from jsonified object.
- * @param {Object} json
- * @returns {ChainEntry}
- */
-
-ChainEntry.fromJSON = function fromJSON(json) {
-  return new ChainEntry().fromJSON(json);
-};
-
-/**
- * Convert the entry to a headers object.
- * @returns {Headers}
- */
-
-ChainEntry.prototype.toHeaders = function toHeaders() {
-  return Headers.fromEntry(this);
-};
-
-/**
- * Convert the entry to an inv item.
- * @returns {InvItem}
- */
-
-ChainEntry.prototype.toInv = function toInv() {
-  return new InvItem(InvItem.types.BLOCK, this.hash);
-};
-
-/**
- * Return a more user-friendly object.
- * @returns {Object}
- */
-
-ChainEntry.prototype.inspect = function inspect() {
-  const json = this.toJSON();
-  json.version = json.version.toString(16);
-  return json;
-};
-
-/**
- * Test whether an object is a {@link ChainEntry}.
- * @param {Object} obj
- * @returns {Boolean}
- */
-
-ChainEntry.isChainEntry = function isChainEntry(obj) {
-  return obj instanceof ChainEntry;
-};
-
 /*
  * Expose
  */

lib/coins/coinentry.js

@@ -22,9 +22,9 @@ const NUM_FLAGS = 1;
 const MAX_HEIGHT = ((1 << (32 - NUM_FLAGS)) >>> 0) - 1;
 
 /**
+ * Coin Entry
  * Represents an unspent output.
  * @alias module:coins.CoinEntry
- * @constructor
  * @property {Number} version - Transaction version.
  * @property {Number} height - Transaction height (-1 if unconfirmed).
  * @property {Boolean} coinbase - Whether the containing
@@ -34,241 +34,245 @@ const MAX_HEIGHT = ((1 << (32 - NUM_FLAGS)) >>> 0) - 1;
  * @property {Buffer} raw
  */
 
-function CoinEntry() {
-  if (!(this instanceof CoinEntry))
-    return new CoinEntry();
+class CoinEntry {
+  /**
+   * Create a coin entry.
+   * @constructor
+   */
 
-  this.version = 1;
-  this.height = -1;
-  this.coinbase = false;
-  this.output = new Output();
-  this.spent = false;
-  this.raw = null;
-}
+  constructor() {
+    this.version = 1;
+    this.height = -1;
+    this.coinbase = false;
+    this.output = new Output();
+    this.spent = false;
+    this.raw = null;
+  }
 
-/**
- * Convert coin entry to an output.
- * @returns {Output}
- */
+  /**
+   * Convert coin entry to an output.
+   * @returns {Output}
+   */
 
-CoinEntry.prototype.toOutput = function toOutput() {
-  return this.output;
-};
+  toOutput() {
+    return this.output;
+  }
 
-/**
- * Convert coin entry to a coin.
- * @param {Outpoint} prevout
- * @returns {Coin}
- */
+  /**
+   * Convert coin entry to a coin.
+   * @param {Outpoint} prevout
+   * @returns {Coin}
+   */
 
-CoinEntry.prototype.toCoin = function toCoin(prevout) {
-  const coin = new Coin();
-  coin.version = this.version;
-  coin.height = this.height;
-  coin.coinbase = this.coinbase;
-  coin.script = this.output.script;
-  coin.value = this.output.value;
-  coin.hash = prevout.hash;
-  coin.index = prevout.index;
-  return coin;
-};
+  toCoin(prevout) {
+    const coin = new Coin();
+    coin.version = this.version;
+    coin.height = this.height;
+    coin.coinbase = this.coinbase;
+    coin.script = this.output.script;
+    coin.value = this.output.value;
+    coin.hash = prevout.hash;
+    coin.index = prevout.index;
+    return coin;
+  }
 
-/**
- * Inject properties from TX.
- * @param {TX} tx
- * @param {Number} index
- */
+  /**
+   * Inject properties from TX.
+   * @param {TX} tx
+   * @param {Number} index
+   */
 
-CoinEntry.prototype.fromOutput = function fromOutput(output) {
-  this.output = output;
-  return this;
-};
+  fromOutput(output) {
+    this.output = output;
+    return this;
+  }
 
-/**
- * Instantiate a coin from a TX
- * @param {TX} tx
- * @param {Number} index - Output index.
- * @returns {CoinEntry}
- */
+  /**
+   * Instantiate a coin from a TX
+   * @param {TX} tx
+   * @param {Number} index - Output index.
+   * @returns {CoinEntry}
+   */
 
-CoinEntry.fromOutput = function fromOutput(output) {
-  return new CoinEntry().fromOutput(output);
-};
+  static fromOutput(output) {
+    return new this().fromOutput(output);
+  }
 
-/**
- * Inject properties from TX.
- * @param {TX} tx
- * @param {Number} index
- */
+  /**
+   * Inject properties from TX.
+   * @param {TX} tx
+   * @param {Number} index
+   */
 
-CoinEntry.prototype.fromCoin = function fromCoin(coin) {
-  this.version = coin.version;
-  this.height = coin.height;
-  this.coinbase = coin.coinbase;
-  this.output.script = coin.script;
-  this.output.value = coin.value;
-  return this;
-};
+  fromCoin(coin) {
+    this.version = coin.version;
+    this.height = coin.height;
+    this.coinbase = coin.coinbase;
+    this.output.script = coin.script;
+    this.output.value = coin.value;
+    return this;
+  }
 
-/**
- * Instantiate a coin from a TX
- * @param {TX} tx
- * @param {Number} index - Output index.
- * @returns {CoinEntry}
- */
+  /**
+   * Instantiate a coin from a TX
+   * @param {TX} tx
+   * @param {Number} index - Output index.
+   * @returns {CoinEntry}
+   */
 
-CoinEntry.fromCoin = function fromCoin(coin) {
-  return new CoinEntry().fromCoin(coin);
-};
+  static fromCoin(coin) {
+    return new this().fromCoin(coin);
+  }
 
-/**
- * Inject properties from TX.
- * @param {TX} tx
- * @param {Number} index
- */
+  /**
+   * Inject properties from TX.
+   * @param {TX} tx
+   * @param {Number} index
+   */
 
-CoinEntry.prototype.fromTX = function fromTX(tx, index, height) {
-  assert(typeof index === 'number');
-  assert(typeof height === 'number');
-  assert(index >= 0 && index < tx.outputs.length);
-  this.version = tx.version;
-  this.height = height;
-  this.coinbase = tx.isCoinbase();
-  this.output = tx.outputs[index];
-  return this;
-};
+  fromTX(tx, index, height) {
+    assert(typeof index === 'number');
+    assert(typeof height === 'number');
+    assert(index >= 0 && index < tx.outputs.length);
+    this.version = tx.version;
+    this.height = height;
+    this.coinbase = tx.isCoinbase();
+    this.output = tx.outputs[index];
+    return this;
+  }
 
-/**
- * Instantiate a coin from a TX
- * @param {TX} tx
- * @param {Number} index - Output index.
- * @returns {CoinEntry}
- */
+  /**
+   * Instantiate a coin from a TX
+   * @param {TX} tx
+   * @param {Number} index - Output index.
+   * @returns {CoinEntry}
+   */
 
-CoinEntry.fromTX = function fromTX(tx, index, height) {
-  return new CoinEntry().fromTX(tx, index, height);
-};
+  static fromTX(tx, index, height) {
+    return new this().fromTX(tx, index, height);
+  }
 
-/**
- * Calculate size of coin.
- * @returns {Number}
- */
+  /**
+   * Calculate size of coin.
+   * @returns {Number}
+   */
 
-CoinEntry.prototype.getSize = function getSize() {
-  if (this.raw)
-    return this.raw.length;
+  getSize() {
+    if (this.raw)
+      return this.raw.length;
 
-  let size = 0;
-  size += encoding.sizeVarint(this.version);
-  size += 4;
-  size += compress.size(this.output);
+    let size = 0;
+    size += encoding.sizeVarint(this.version);
+    size += 4;
+    size += compress.size(this.output);
 
-  return size;
-};
+    return size;
+  }
 
-/**
- * Write the coin to a buffer writer.
- * @param {BufferWriter} bw
- */
+  /**
+   * Write the coin to a buffer writer.
+   * @param {BufferWriter} bw
+   */
+
+  toWriter(bw) {
+    if (this.raw) {
+      bw.writeBytes(this.raw);
+      return bw;
+    }
+
+    let height = this.height;
+    let field = 0;
+
+    if (this.coinbase)
+      field |= 1;
+
+    if (height === -1)
+      height = MAX_HEIGHT;
+
+    field |= height << NUM_FLAGS;
+
+    bw.writeVarint(this.version);
+    bw.writeU32(field);
+    compress.pack(this.output, bw);
 
-CoinEntry.prototype.toWriter = function toWriter(bw) {
-  if (this.raw) {
-    bw.writeBytes(this.raw);
     return bw;
   }
 
-  let height = this.height;
-  let field = 0;
+  /**
+   * Serialize the coin.
+   * @returns {Buffer}
+   */
 
-  if (this.coinbase)
-    field |= 1;
+  toRaw() {
+    if (this.raw)
+      return this.raw;
 
-  if (height === -1)
-    height = MAX_HEIGHT;
+    const size = this.getSize();
+    const bw = new StaticWriter(size);
 
-  field |= height << NUM_FLAGS;
+    this.toWriter(bw);
 
-  bw.writeVarint(this.version);
-  bw.writeU32(field);
-  compress.pack(this.output, bw);
+    this.raw = bw.render();
 
-  return bw;
-};
-
-/**
- * Serialize the coin.
- * @returns {Buffer}
- */
-
-CoinEntry.prototype.toRaw = function toRaw() {
-  if (this.raw)
     return this.raw;
+  }
 
-  const size = this.getSize();
-  const bw = new StaticWriter(size);
+  /**
+   * Inject properties from serialized buffer writer.
+   * @private
+   * @param {BufferReader} br
+   */
 
-  this.toWriter(bw);
+  fromReader(br) {
+    const version = br.readVarint();
+    const field = br.readU32();
 
-  this.raw = bw.render();
+    let height = field >>> NUM_FLAGS;
 
-  return this.raw;
-};
+    if (height === MAX_HEIGHT)
+      height = -1;
 
-/**
- * Inject properties from serialized buffer writer.
- * @private
- * @param {BufferReader} br
- */
+    this.version = version;
+    this.coinbase = (field & 1) !== 0;
+    this.height = height;
 
-CoinEntry.prototype.fromReader = function fromReader(br) {
-  const version = br.readVarint();
-  const field = br.readU32();
+    compress.unpack(this.output, br);
 
-  let height = field >>> NUM_FLAGS;
+    return this;
+  }
 
-  if (height === MAX_HEIGHT)
-    height = -1;
+  /**
+   * Instantiate a coin from a serialized Buffer.
+   * @param {Buffer} data
+   * @returns {CoinEntry}
+   */
 
-  this.version = version;
-  this.coinbase = (field & 1) !== 0;
-  this.height = height;
+  static fromReader(data) {
+    return new this().fromReader(data);
+  }
 
-  compress.unpack(this.output, br);
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
 
-  return this;
-};
+  fromRaw(data) {
+    this.fromReader(new BufferReader(data));
+    this.raw = data;
+    return this;
+  }
 
-/**
- * Instantiate a coin from a serialized Buffer.
- * @param {Buffer} data
- * @returns {CoinEntry}
- */
+  /**
+   * Instantiate a coin from a serialized Buffer.
+   * @param {Buffer} data
+   * @returns {CoinEntry}
+   */
 
-CoinEntry.fromReader = function fromReader(data) {
-  return new CoinEntry().fromReader(data);
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
-
-CoinEntry.prototype.fromRaw = function fromRaw(data) {
-  this.fromReader(new BufferReader(data));
-  this.raw = data;
-  return this;
-};
-
-/**
- * Instantiate a coin from a serialized Buffer.
- * @param {Buffer} data
- * @returns {CoinEntry}
- */
-
-CoinEntry.fromRaw = function fromRaw(data) {
-  return new CoinEntry().fromRaw(data);
-};
+  static fromRaw(data) {
+    return new this().fromRaw(data);
+  }
+}
 
 /*
  * Expose

lib/coins/coins.js

@@ -10,209 +10,213 @@ const assert = require('assert');
 const CoinEntry = require('./coinentry');
 
 /**
+ * Coins
  * Represents the outputs for a single transaction.
  * @alias module:coins.Coins
- * @constructor
  * @property {Map[]} outputs - Coins.
  */
 
-function Coins() {
-  if (!(this instanceof Coins))
-    return new Coins();
+class Coins {
+  /**
+   * Create coins.
+   * @constructor
+   */
 
-  this.outputs = new Map();
-}
-
-/**
- * Add a single entry to the collection.
- * @param {Number} index
- * @param {CoinEntry} coin
- * @returns {CoinEntry}
- */
-
-Coins.prototype.add = function add(index, coin) {
-  assert((index >>> 0) === index);
-  assert(coin);
-  this.outputs.set(index, coin);
-  return coin;
-};
-
-/**
- * Add a single output to the collection.
- * @param {Number} index
- * @param {Output} output
- * @returns {CoinEntry}
- */
-
-Coins.prototype.addOutput = function addOutput(index, output) {
-  return this.add(index, CoinEntry.fromOutput(output));
-};
-
-/**
- * Add an output to the collection by output index.
- * @param {TX} tx
- * @param {Number} index
- * @param {Number} height
- * @returns {CoinEntry}
- */
-
-Coins.prototype.addIndex = function addIndex(tx, index, height) {
-  return this.add(index, CoinEntry.fromTX(tx, index, height));
-};
-
-/**
- * Add a single coin to the collection.
- * @param {Coin} coin
- * @returns {CoinEntry}
- */
-
-Coins.prototype.addCoin = function addCoin(coin) {
-  return this.add(coin.index, CoinEntry.fromCoin(coin));
-};
-
-/**
- * Test whether the collection has a coin.
- * @param {Number} index
- * @returns {Boolean}
- */
-
-Coins.prototype.has = function has(index) {
-  return this.outputs.has(index);
-};
-
-/**
- * Test whether the collection has an unspent coin.
- * @param {Number} index
- * @returns {Boolean}
- */
-
-Coins.prototype.isUnspent = function isUnspent(index) {
-  const coin = this.outputs.get(index);
-
-  if (!coin || coin.spent)
-    return false;
-
-  return true;
-};
-
-/**
- * Get a coin entry.
- * @param {Number} index
- * @returns {CoinEntry|null}
- */
-
-Coins.prototype.get = function get(index) {
-  return this.outputs.get(index) || null;
-};
-
-/**
- * Get an output.
- * @param {Number} index
- * @returns {Output|null}
- */
-
-Coins.prototype.getOutput = function getOutput(index) {
-  const coin = this.outputs.get(index);
-
-  if (!coin)
-    return null;
-
-  return coin.output;
-};
-
-/**
- * Get a coin.
- * @param {Outpoint} prevout
- * @returns {Coin|null}
- */
-
-Coins.prototype.getCoin = function getCoin(prevout) {
-  const coin = this.outputs.get(prevout.index);
-
-  if (!coin)
-    return null;
-
-  return coin.toCoin(prevout);
-};
-
-/**
- * Spend a coin entry and return it.
- * @param {Number} index
- * @returns {CoinEntry|null}
- */
-
-Coins.prototype.spend = function spend(index) {
-  const coin = this.get(index);
-
-  if (!coin || coin.spent)
-    return null;
-
-  coin.spent = true;
-
-  return coin;
-};
-
-/**
- * Remove a coin entry and return it.
- * @param {Number} index
- * @returns {CoinEntry|null}
- */
-
-Coins.prototype.remove = function remove(index) {
-  const coin = this.get(index);
-
-  if (!coin)
-    return null;
-
-  this.outputs.delete(index);
-
-  return coin;
-};
-
-/**
- * Test whether the coins are fully spent.
- * @returns {Boolean}
- */
-
-Coins.prototype.isEmpty = function isEmpty() {
-  return this.outputs.size === 0;
-};
-
-/**
- * Inject properties from tx.
- * @private
- * @param {TX} tx
- * @param {Number} height
- * @returns {Coins}
- */
-
-Coins.prototype.fromTX = function fromTX(tx, height) {
-  assert(typeof height === 'number');
-
-  for (let i = 0; i < tx.outputs.length; i++) {
-    const output = tx.outputs[i];
-
-    if (output.script.isUnspendable())
-      continue;
-
-    const entry = CoinEntry.fromTX(tx, i, height);
-
-    this.outputs.set(i, entry);
+  constructor() {
+    this.outputs = new Map();
   }
 
-  return this;
-};
+  /**
+   * Add a single entry to the collection.
+   * @param {Number} index
+   * @param {CoinEntry} coin
+   * @returns {CoinEntry}
+   */
 
-/**
- * Instantiate a coins object from a transaction.
- * @param {TX} tx
- * @param {Number} height
- * @returns {Coins}
- */
+  add(index, coin) {
+    assert((index >>> 0) === index);
+    assert(coin);
+    this.outputs.set(index, coin);
+    return coin;
+  }
 
-Coins.fromTX = function fromTX(tx, height) {
-  return new Coins().fromTX(tx, height);
-};
+  /**
+   * Add a single output to the collection.
+   * @param {Number} index
+   * @param {Output} output
+   * @returns {CoinEntry}
+   */
+
+  addOutput(index, output) {
+    return this.add(index, CoinEntry.fromOutput(output));
+  }
+
+  /**
+   * Add an output to the collection by output index.
+   * @param {TX} tx
+   * @param {Number} index
+   * @param {Number} height
+   * @returns {CoinEntry}
+   */
+
+  addIndex(tx, index, height) {
+    return this.add(index, CoinEntry.fromTX(tx, index, height));
+  }
+
+  /**
+   * Add a single coin to the collection.
+   * @param {Coin} coin
+   * @returns {CoinEntry}
+   */
+
+  addCoin(coin) {
+    return this.add(coin.index, CoinEntry.fromCoin(coin));
+  }
+
+  /**
+   * Test whether the collection has a coin.
+   * @param {Number} index
+   * @returns {Boolean}
+   */
+
+  has(index) {
+    return this.outputs.has(index);
+  }
+
+  /**
+   * Test whether the collection has an unspent coin.
+   * @param {Number} index
+   * @returns {Boolean}
+   */
+
+  isUnspent(index) {
+    const coin = this.outputs.get(index);
+
+    if (!coin || coin.spent)
+      return false;
+
+    return true;
+  }
+
+  /**
+   * Get a coin entry.
+   * @param {Number} index
+   * @returns {CoinEntry|null}
+   */
+
+  get(index) {
+    return this.outputs.get(index) || null;
+  }
+
+  /**
+   * Get an output.
+   * @param {Number} index
+   * @returns {Output|null}
+   */
+
+  getOutput(index) {
+    const coin = this.outputs.get(index);
+
+    if (!coin)
+      return null;
+
+    return coin.output;
+  }
+
+  /**
+   * Get a coin.
+   * @param {Outpoint} prevout
+   * @returns {Coin|null}
+   */
+
+  getCoin(prevout) {
+    const coin = this.outputs.get(prevout.index);
+
+    if (!coin)
+      return null;
+
+    return coin.toCoin(prevout);
+  }
+
+  /**
+   * Spend a coin entry and return it.
+   * @param {Number} index
+   * @returns {CoinEntry|null}
+   */
+
+  spend(index) {
+    const coin = this.get(index);
+
+    if (!coin || coin.spent)
+      return null;
+
+    coin.spent = true;
+
+    return coin;
+  }
+
+  /**
+   * Remove a coin entry and return it.
+   * @param {Number} index
+   * @returns {CoinEntry|null}
+   */
+
+  remove(index) {
+    const coin = this.get(index);
+
+    if (!coin)
+      return null;
+
+    this.outputs.delete(index);
+
+    return coin;
+  }
+
+  /**
+   * Test whether the coins are fully spent.
+   * @returns {Boolean}
+   */
+
+  isEmpty() {
+    return this.outputs.size === 0;
+  }
+
+  /**
+   * Inject properties from tx.
+   * @private
+   * @param {TX} tx
+   * @param {Number} height
+   * @returns {Coins}
+   */
+
+  fromTX(tx, height) {
+    assert(typeof height === 'number');
+
+    for (let i = 0; i < tx.outputs.length; i++) {
+      const output = tx.outputs[i];
+
+      if (output.script.isUnspendable())
+        continue;
+
+      const entry = CoinEntry.fromTX(tx, i, height);
+
+      this.outputs.set(i, entry);
+    }
+
+    return this;
+  }
+
+  /**
+   * Instantiate a coins object from a transaction.
+   * @param {TX} tx
+   * @param {Number} height
+   * @returns {Coins}
+   */
+
+  static fromTX(tx, height) {
+    return new this().fromTX(tx, height);
+  }
+}
 
 /*
  * Expose

lib/coins/undocoins.js

@@ -12,127 +12,130 @@ const StaticWriter = require('bufio/lib/staticwriter');
 const CoinEntry = require('../coins/coinentry');
 
 /**
- * UndoCoins
+ * Undo Coins
  * Coins need to be resurrected from somewhere
  * during a reorg. The undo coins store all
  * spent coins in a single record per block
  * (in a compressed format).
  * @alias module:coins.UndoCoins
- * @constructor
  * @property {UndoCoin[]} items
  */
 
-function UndoCoins() {
-  if (!(this instanceof UndoCoins))
-    return new UndoCoins();
+class UndoCoins {
+  /**
+   * Create undo coins.
+   * @constructor
+   */
 
-  this.items = [];
+  constructor() {
+    this.items = [];
+  }
+
+  /**
+   * Push coin entry onto undo coin array.
+   * @param {CoinEntry}
+   * @returns {Number}
+   */
+
+  push(coin) {
+    return this.items.push(coin);
+  }
+
+  /**
+   * Calculate undo coins size.
+   * @returns {Number}
+   */
+
+  getSize() {
+    let size = 0;
+
+    size += 4;
+
+    for (const coin of this.items)
+      size += coin.getSize();
+
+    return size;
+  }
+
+  /**
+   * Serialize all undo coins.
+   * @returns {Buffer}
+   */
+
+  toRaw() {
+    const size = this.getSize();
+    const bw = new StaticWriter(size);
+
+    bw.writeU32(this.items.length);
+
+    for (const coin of this.items)
+      coin.toWriter(bw);
+
+    return bw.render();
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   * @returns {UndoCoins}
+   */
+
+  fromRaw(data) {
+    const br = new BufferReader(data);
+    const count = br.readU32();
+
+    for (let i = 0; i < count; i++)
+      this.items.push(CoinEntry.fromReader(br));
+
+    return this;
+  }
+
+  /**
+   * Instantiate undo coins from serialized data.
+   * @param {Buffer} data
+   * @returns {UndoCoins}
+   */
+
+  static fromRaw(data) {
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Test whether the undo coins have any members.
+   * @returns {Boolean}
+   */
+
+  isEmpty() {
+    return this.items.length === 0;
+  }
+
+  /**
+   * Render the undo coins.
+   * @returns {Buffer}
+   */
+
+  commit() {
+    const raw = this.toRaw();
+    this.items.length = 0;
+    return raw;
+  }
+
+  /**
+   * Re-apply undo coins to a view, effectively unspending them.
+   * @param {CoinView} view
+   * @param {Outpoint} prevout
+   */
+
+  apply(view, prevout) {
+    const undo = this.items.pop();
+
+    assert(undo);
+
+    view.addEntry(prevout, undo);
+  }
 }
 
-/**
- * Push coin entry onto undo coin array.
- * @param {CoinEntry}
- * @returns {Number}
- */
-
-UndoCoins.prototype.push = function push(coin) {
-  return this.items.push(coin);
-};
-
-/**
- * Calculate undo coins size.
- * @returns {Number}
- */
-
-UndoCoins.prototype.getSize = function getSize() {
-  let size = 0;
-
-  size += 4;
-
-  for (const coin of this.items)
-    size += coin.getSize();
-
-  return size;
-};
-
-/**
- * Serialize all undo coins.
- * @returns {Buffer}
- */
-
-UndoCoins.prototype.toRaw = function toRaw() {
-  const size = this.getSize();
-  const bw = new StaticWriter(size);
-
-  bw.writeU32(this.items.length);
-
-  for (const coin of this.items)
-    coin.toWriter(bw);
-
-  return bw.render();
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- * @returns {UndoCoins}
- */
-
-UndoCoins.prototype.fromRaw = function fromRaw(data) {
-  const br = new BufferReader(data);
-  const count = br.readU32();
-
-  for (let i = 0; i < count; i++)
-    this.items.push(CoinEntry.fromReader(br));
-
-  return this;
-};
-
-/**
- * Instantiate undo coins from serialized data.
- * @param {Buffer} data
- * @returns {UndoCoins}
- */
-
-UndoCoins.fromRaw = function fromRaw(data) {
-  return new UndoCoins().fromRaw(data);
-};
-
-/**
- * Test whether the undo coins have any members.
- * @returns {Boolean}
- */
-
-UndoCoins.prototype.isEmpty = function isEmpty() {
-  return this.items.length === 0;
-};
-
-/**
- * Render the undo coins.
- * @returns {Buffer}
- */
-
-UndoCoins.prototype.commit = function commit() {
-  const raw = this.toRaw();
-  this.items.length = 0;
-  return raw;
-};
-
-/**
- * Re-apply undo coins to a view, effectively unspending them.
- * @param {CoinView} view
- * @param {Outpoint} prevout
- */
-
-UndoCoins.prototype.apply = function apply(view, prevout) {
-  const undo = this.items.pop();
-
-  assert(undo);
-
-  view.addEntry(prevout, undo);
-};
-
 /*
  * Expose
  */

lib/mining/miner.js

@@ -221,7 +221,7 @@ Miner.prototype.mineBlock = function mineBlock(tip, address) {
  */
 
 Miner.prototype.addAddress = function addAddress(address) {
-  this.addresses.push(Address(address));
+  this.addresses.push(new Address(address));
 };
 
 /**

lib/mining/template.js

@@ -512,7 +512,7 @@ BlockTemplate.prototype.getDifficulty = function getDifficulty() {
  */
 
 BlockTemplate.prototype.setAddress = function setAddress(address) {
-  this.address = Address(address);
+  this.address = new Address(address);
   this.refresh();
 };
 

lib/primitives/abstractblock.js

@@ -11,249 +11,252 @@ const assert = require('assert');
 const hash256 = require('bcrypto/lib/hash256');
 const BufferReader = require('bufio/lib/reader');
 const StaticWriter = require('bufio/lib/staticwriter');
-const InvItem = require('./invitem');
 const encoding = require('bufio/lib/encoding');
+const InvItem = require('./invitem');
 const consensus = require('../protocol/consensus');
 
 /**
+ * Abstract Block
  * The class which all block-like objects inherit from.
  * @alias module:primitives.AbstractBlock
- * @constructor
  * @abstract
- * @property {Number} version - Block version. Note
- * that Bcoin reads versions as unsigned despite
- * them being signed on the protocol level. This
- * number will never be negative.
- * @property {Hash} prevBlock - Previous block hash.
- * @property {Hash} merkleRoot - Merkle root hash.
- * @property {Number} time - Timestamp.
+ * @property {Number} version
+ * @property {Hash} prevBlock
+ * @property {Hash} merkleRoot
+ * @property {Number} time
  * @property {Number} bits
  * @property {Number} nonce
  */
 
-function AbstractBlock() {
-  if (!(this instanceof AbstractBlock))
-    return new AbstractBlock();
+class AbstractBlock {
+  /**
+   * Create an abstract block.
+   * @constructor
+   */
 
-  this.version = 1;
-  this.prevBlock = encoding.NULL_HASH;
-  this.merkleRoot = encoding.NULL_HASH;
-  this.time = 0;
-  this.bits = 0;
-  this.nonce = 0;
+  constructor() {
+    this.version = 1;
+    this.prevBlock = encoding.NULL_HASH;
+    this.merkleRoot = encoding.NULL_HASH;
+    this.time = 0;
+    this.bits = 0;
+    this.nonce = 0;
 
-  this.mutable = false;
+    this.mutable = false;
 
-  this._hash = null;
-  this._hhash = null;
-}
-
-/**
- * Inject properties from options object.
- * @private
- * @param {NakedBlock} options
- */
-
-AbstractBlock.prototype.parseOptions = function parseOptions(options) {
-  assert(options, 'Block data is required.');
-  assert((options.version >>> 0) === options.version);
-  assert(typeof options.prevBlock === 'string');
-  assert(typeof options.merkleRoot === 'string');
-  assert((options.time >>> 0) === options.time);
-  assert((options.bits >>> 0) === options.bits);
-  assert((options.nonce >>> 0) === options.nonce);
-
-  this.version = options.version;
-  this.prevBlock = options.prevBlock;
-  this.merkleRoot = options.merkleRoot;
-  this.time = options.time;
-  this.bits = options.bits;
-  this.nonce = options.nonce;
-
-  if (options.mutable != null)
-    this.mutable = Boolean(options.mutable);
-
-  return this;
-};
-
-/**
- * Inject properties from json object.
- * @private
- * @param {Object} json
- */
-
-AbstractBlock.prototype.parseJSON = function parseJSON(json) {
-  assert(json, 'Block data is required.');
-  assert((json.version >>> 0) === json.version);
-  assert(typeof json.prevBlock === 'string');
-  assert(typeof json.merkleRoot === 'string');
-  assert((json.time >>> 0) === json.time);
-  assert((json.bits >>> 0) === json.bits);
-  assert((json.nonce >>> 0) === json.nonce);
-
-  this.version = json.version;
-  this.prevBlock = encoding.revHex(json.prevBlock);
-  this.merkleRoot = encoding.revHex(json.merkleRoot);
-  this.time = json.time;
-  this.bits = json.bits;
-  this.nonce = json.nonce;
-
-  return this;
-};
-
-/**
- * Test whether the block is a memblock.
- * @returns {Boolean}
- */
-
-AbstractBlock.prototype.isMemory = function isMemory() {
-  return false;
-};
-
-/**
- * Clear any cached values (abstract).
- */
-
-AbstractBlock.prototype._refresh = function _refresh() {
-  this._hash = null;
-  this._hhash = null;
-};
-
-/**
- * Clear any cached values.
- */
-
-AbstractBlock.prototype.refresh = function refresh() {
-  return this._refresh();
-};
-
-/**
- * Hash the block headers.
- * @param {String?} enc - Can be `'hex'` or `null`.
- * @returns {Hash|Buffer} hash
- */
-
-AbstractBlock.prototype.hash = function hash(enc) {
-  let h = this._hash;
-
-  if (!h) {
-    h = hash256.digest(this.toHead());
-    if (!this.mutable)
-      this._hash = h;
+    this._hash = null;
+    this._hhash = null;
   }
 
-  if (enc === 'hex') {
-    let hex = this._hhash;
-    if (!hex) {
-      hex = h.toString('hex');
-      if (!this.mutable)
-        this._hhash = hex;
+  /**
+   * Inject properties from options object.
+   * @private
+   * @param {NakedBlock} options
+   */
+
+  parseOptions(options) {
+    assert(options, 'Block data is required.');
+    assert((options.version >>> 0) === options.version);
+    assert(typeof options.prevBlock === 'string');
+    assert(typeof options.merkleRoot === 'string');
+    assert((options.time >>> 0) === options.time);
+    assert((options.bits >>> 0) === options.bits);
+    assert((options.nonce >>> 0) === options.nonce);
+
+    this.version = options.version;
+    this.prevBlock = options.prevBlock;
+    this.merkleRoot = options.merkleRoot;
+    this.time = options.time;
+    this.bits = options.bits;
+    this.nonce = options.nonce;
+
+    if (options.mutable != null) {
+      assert(typeof options.mutable === 'boolean');
+      this.mutable = options.mutable;
     }
-    h = hex;
+
+    return this;
   }
 
-  return h;
-};
+  /**
+   * Inject properties from json object.
+   * @private
+   * @param {Object} json
+   */
 
-/**
- * Serialize the block headers.
- * @returns {Buffer}
- */
+  parseJSON(json) {
+    assert(json, 'Block data is required.');
+    assert((json.version >>> 0) === json.version);
+    assert(typeof json.prevBlock === 'string');
+    assert(typeof json.merkleRoot === 'string');
+    assert((json.time >>> 0) === json.time);
+    assert((json.bits >>> 0) === json.bits);
+    assert((json.nonce >>> 0) === json.nonce);
 
-AbstractBlock.prototype.toHead = function toHead() {
-  return this.writeHead(new StaticWriter(80)).render();
-};
+    this.version = json.version;
+    this.prevBlock = encoding.revHex(json.prevBlock);
+    this.merkleRoot = encoding.revHex(json.merkleRoot);
+    this.time = json.time;
+    this.bits = json.bits;
+    this.nonce = json.nonce;
 
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
+    return this;
+  }
 
-AbstractBlock.prototype.fromHead = function fromHead(data) {
-  return this.readHead(new BufferReader(data));
-};
+  /**
+   * Test whether the block is a memblock.
+   * @returns {Boolean}
+   */
 
-/**
- * Serialize the block headers.
- * @param {BufferWriter} bw
- */
-
-AbstractBlock.prototype.writeHead = function writeHead(bw) {
-  bw.writeU32(this.version);
-  bw.writeHash(this.prevBlock);
-  bw.writeHash(this.merkleRoot);
-  bw.writeU32(this.time);
-  bw.writeU32(this.bits);
-  bw.writeU32(this.nonce);
-  return bw;
-};
-
-/**
- * Parse the block headers.
- * @param {BufferReader} br
- */
-
-AbstractBlock.prototype.readHead = function readHead(br) {
-  this.version = br.readU32();
-  this.prevBlock = br.readHash('hex');
-  this.merkleRoot = br.readHash('hex');
-  this.time = br.readU32();
-  this.bits = br.readU32();
-  this.nonce = br.readU32();
-  return this;
-};
-
-/**
- * Verify the block.
- * @returns {Boolean}
- */
-
-AbstractBlock.prototype.verify = function verify() {
-  if (!this.verifyPOW())
+  isMemory() {
     return false;
+  }
 
-  if (!this.verifyBody())
-    return false;
+  /**
+   * Clear any cached values (abstract).
+   */
 
-  return true;
-};
+  _refresh() {
+    this._hash = null;
+    this._hhash = null;
+  }
 
-/**
- * Verify proof-of-work.
- * @returns {Boolean}
- */
+  /**
+   * Clear any cached values.
+   */
 
-AbstractBlock.prototype.verifyPOW = function verifyPOW() {
-  return consensus.verifyPOW(this.hash(), this.bits);
-};
+  refresh() {
+    return this._refresh();
+  }
 
-/**
- * Verify the block.
- * @returns {Boolean}
- */
+  /**
+   * Hash the block headers.
+   * @param {String?} enc - Can be `'hex'` or `null`.
+   * @returns {Hash|Buffer} hash
+   */
 
-AbstractBlock.prototype.verifyBody = function verifyBody() {
-  throw new Error('Abstract method.');
-};
+  hash(enc) {
+    let h = this._hash;
 
-/**
- * Get little-endian block hash.
- * @returns {Hash}
- */
+    if (!h) {
+      h = hash256.digest(this.toHead());
+      if (!this.mutable)
+        this._hash = h;
+    }
 
-AbstractBlock.prototype.rhash = function rhash() {
-  return encoding.revHex(this.hash('hex'));
-};
+    if (enc === 'hex') {
+      let hex = this._hhash;
+      if (!hex) {
+        hex = h.toString('hex');
+        if (!this.mutable)
+          this._hhash = hex;
+      }
+      h = hex;
+    }
 
-/**
- * Convert the block to an inv item.
- * @returns {InvItem}
- */
+    return h;
+  }
 
-AbstractBlock.prototype.toInv = function toInv() {
-  return new InvItem(InvItem.types.BLOCK, this.hash('hex'));
-};
+  /**
+   * Serialize the block headers.
+   * @returns {Buffer}
+   */
+
+  toHead() {
+    return this.writeHead(new StaticWriter(80)).render();
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromHead(data) {
+    return this.readHead(new BufferReader(data));
+  }
+
+  /**
+   * Serialize the block headers.
+   * @param {BufferWriter} bw
+   */
+
+  writeHead(bw) {
+    bw.writeU32(this.version);
+    bw.writeHash(this.prevBlock);
+    bw.writeHash(this.merkleRoot);
+    bw.writeU32(this.time);
+    bw.writeU32(this.bits);
+    bw.writeU32(this.nonce);
+    return bw;
+  }
+
+  /**
+   * Parse the block headers.
+   * @param {BufferReader} br
+   */
+
+  readHead(br) {
+    this.version = br.readU32();
+    this.prevBlock = br.readHash('hex');
+    this.merkleRoot = br.readHash('hex');
+    this.time = br.readU32();
+    this.bits = br.readU32();
+    this.nonce = br.readU32();
+    return this;
+  }
+
+  /**
+   * Verify the block.
+   * @returns {Boolean}
+   */
+
+  verify() {
+    if (!this.verifyPOW())
+      return false;
+
+    if (!this.verifyBody())
+      return false;
+
+    return true;
+  }
+
+  /**
+   * Verify proof-of-work.
+   * @returns {Boolean}
+   */
+
+  verifyPOW() {
+    return consensus.verifyPOW(this.hash(), this.bits);
+  }
+
+  /**
+   * Verify the block.
+   * @returns {Boolean}
+   */
+
+  verifyBody() {
+    throw new Error('Abstract method.');
+  }
+
+  /**
+   * Get little-endian block hash.
+   * @returns {Hash}
+   */
+
+  rhash() {
+    return encoding.revHex(this.hash('hex'));
+  }
+
+  /**
+   * Convert the block to an inv item.
+   * @returns {InvItem}
+   */
+
+  toInv() {
+    return new InvItem(InvItem.types.BLOCK, this.hash('hex'));
+  }
+}
 
 /*
  * Expose

lib/primitives/coin.js

@@ -8,427 +8,429 @@
 'use strict';
 
 const assert = require('assert');
+const BufferReader = require('bufio/lib/reader');
+const StaticWriter = require('bufio/lib/staticwriter');
+const encoding = require('bufio/lib/encoding');
 const Amount = require('../btc/amount');
 const Output = require('./output');
 const Script = require('../script/script');
 const Network = require('../protocol/network');
-const BufferReader = require('bufio/lib/reader');
-const StaticWriter = require('bufio/lib/staticwriter');
-const encoding = require('bufio/lib/encoding');
 
 /**
+ * Coin
  * Represents an unspent output.
  * @alias module:primitives.Coin
- * @constructor
  * @extends Output
- * @param {NakedCoin|Coin} options
- * @property {Number} version - Transaction version.
- * @property {Number} height - Transaction height (-1 if unconfirmed).
- * @property {Amount} value - Output value in satoshis.
- * @property {Script} script - Output script.
- * @property {Boolean} coinbase - Whether the containing
- * transaction is a coinbase.
- * @property {Hash} hash - Transaction hash.
- * @property {Number} index - Output index.
+ * @property {Number} version
+ * @property {Number} height
+ * @property {Amount} value
+ * @property {Script} script
+ * @property {Boolean} coinbase
+ * @property {Hash} hash
+ * @property {Number} index
  */
 
-function Coin(options) {
-  if (!(this instanceof Coin))
-    return new Coin(options);
+class Coin extends Output {
+  /**
+   * Create a coin.
+   * @constructor
+   * @param {Object} options
+   */
 
-  this.version = 1;
-  this.height = -1;
-  this.value = 0;
-  this.script = new Script();
-  this.coinbase = false;
-  this.hash = encoding.NULL_HASH;
-  this.index = 0;
+  constructor(options) {
+    super();
 
-  if (options)
-    this.fromOptions(options);
-}
-
-Object.setPrototypeOf(Coin.prototype, Output.prototype);
-
-/**
- * Inject options into coin.
- * @private
- * @param {Object} options
- */
-
-Coin.prototype.fromOptions = function fromOptions(options) {
-  assert(options, 'Coin data is required.');
-
-  if (options.version != null) {
-    assert((options.version >>> 0) === options.version,
-      'Version must be a uint32.');
-    this.version = options.version;
-  }
-
-  if (options.height != null) {
-    if (options.height !== -1) {
-      assert((options.height >>> 0) === options.height,
-        'Height must be a uint32.');
-      this.height = options.height;
-    } else {
-      this.height = -1;
-    }
-  }
-
-  if (options.value != null) {
-    assert(Number.isSafeInteger(options.value) && options.value >= 0,
-      'Value must be a uint64.');
-    this.value = options.value;
-  }
-
-  if (options.script)
-    this.script.fromOptions(options.script);
-
-  if (options.coinbase != null) {
-    assert(typeof options.coinbase === 'boolean',
-      'Coinbase must be a boolean.');
-    this.coinbase = options.coinbase;
-  }
-
-  if (options.hash != null) {
-    assert(typeof options.hash === 'string', 'Hash must be a string.');
-    this.hash = options.hash;
-  }
-
-  if (options.index != null) {
-    assert((options.index >>> 0) === options.index, 'Index must be a uint32.');
-    this.index = options.index;
-  }
-
-  return this;
-};
-
-/**
- * Instantiate Coin from options object.
- * @private
- * @param {Object} options
- */
-
-Coin.fromOptions = function fromOptions(options) {
-  return new Coin().fromOptions(options);
-};
-
-/**
- * Clone the coin.
- * @private
- * @returns {Coin}
- */
-
-Coin.prototype.clone = function clone() {
-  assert(false, 'Coins are not cloneable.');
-};
-
-/**
- * Calculate number of confirmations since coin was created.
- * @param {Number?} height - Current chain height. Network
- * height is used if not passed in.
- * @return {Number}
- */
-
-Coin.prototype.getDepth = function getDepth(height) {
-  assert(typeof height === 'number', 'Must pass a height.');
-
-  if (this.height === -1)
-    return 0;
-
-  if (height === -1)
-    return 0;
-
-  if (height < this.height)
-    return 0;
-
-  return height - this.height + 1;
-};
-
-/**
- * Serialize coin to a key
- * suitable for a hash table.
- * @returns {String}
- */
-
-Coin.prototype.toKey = function toKey() {
-  return this.hash + this.index;
-};
-
-/**
- * Inject properties from hash table key.
- * @private
- * @param {String} key
- * @returns {Coin}
- */
-
-Coin.prototype.fromKey = function fromKey(key) {
-  assert(key.length > 64);
-  this.hash = key.slice(0, 64);
-  this.index = parseInt(key.slice(64), 10);
-  return this;
-};
-
-/**
- * Instantiate coin from hash table key.
- * @param {String} key
- * @returns {Coin}
- */
-
-Coin.fromKey = function fromKey(key) {
-  return new Coin().fromKey(key);
-};
-
-/**
- * Get little-endian hash.
- * @returns {Hash}
- */
-
-Coin.prototype.rhash = function rhash() {
-  return encoding.revHex(this.hash);
-};
-
-/**
- * Get little-endian hash.
- * @returns {Hash}
- */
-
-Coin.prototype.txid = function txid() {
-  return this.rhash();
-};
-
-/**
- * Convert the coin to a more user-friendly object.
- * @returns {Object}
- */
-
-Coin.prototype.inspect = function inspect() {
-  return {
-    type: this.getType(),
-    version: this.version,
-    height: this.height,
-    value: Amount.btc(this.value),
-    script: this.script,
-    coinbase: this.coinbase,
-    hash: this.hash ? encoding.revHex(this.hash) : null,
-    index: this.index,
-    address: this.getAddress()
-  };
-};
-
-/**
- * Convert the coin to an object suitable
- * for JSON serialization.
- * @returns {Object}
- */
-
-Coin.prototype.toJSON = function toJSON() {
-  return this.getJSON();
-};
-
-/**
- * Convert the coin to an object suitable
- * for JSON serialization. Note that the hash
- * will be reversed to abide by bitcoind's legacy
- * of little-endian uint256s.
- * @param {Network} network
- * @param {Boolean} minimal
- * @returns {Object}
- */
-
-Coin.prototype.getJSON = function getJSON(network, minimal) {
-  let addr = this.getAddress();
-
-  network = Network.get(network);
-
-  if (addr)
-    addr = addr.toString(network);
-
-  return {
-    version: this.version,
-    height: this.height,
-    value: this.value,
-    script: this.script.toJSON(),
-    address: addr,
-    coinbase: this.coinbase,
-    hash: !minimal ? this.rhash() : undefined,
-    index: !minimal ? this.index : undefined
-  };
-};
-
-/**
- * Inject JSON properties into coin.
- * @private
- * @param {Object} json
- */
-
-Coin.prototype.fromJSON = function fromJSON(json) {
-  assert(json, 'Coin data required.');
-  assert((json.version >>> 0) === json.version, 'Version must be a uint32.');
-  assert(json.height === -1 || (json.height >>> 0) === json.height,
-    'Height must be a uint32.');
-  assert(Number.isSafeInteger(json.value) && json.value >= 0,
-    'Value must be a uint64.');
-  assert(typeof json.coinbase === 'boolean', 'Coinbase must be a boolean.');
-
-  this.version = json.version;
-  this.height = json.height;
-  this.value = json.value;
-  this.script.fromJSON(json.script);
-  this.coinbase = json.coinbase;
-
-  if (json.hash != null) {
-    assert(typeof json.hash === 'string', 'Hash must be a string.');
-    assert(json.hash.length === 64, 'Hash must be a string.');
-    assert((json.index >>> 0) === json.index, 'Index must be a uint32.');
-    this.hash = encoding.revHex(json.hash);
-    this.index = json.index;
-  }
-
-  return this;
-};
-
-/**
- * Instantiate an Coin from a jsonified coin object.
- * @param {Object} json - The jsonified coin object.
- * @returns {Coin}
- */
-
-Coin.fromJSON = function fromJSON(json) {
-  return new Coin().fromJSON(json);
-};
-
-/**
- * Calculate size of coin.
- * @returns {Number}
- */
-
-Coin.prototype.getSize = function getSize() {
-  return 17 + this.script.getVarSize();
-};
-
-/**
- * Write the coin to a buffer writer.
- * @param {BufferWriter} bw
- */
-
-Coin.prototype.toWriter = function toWriter(bw) {
-  let height = this.height;
-
-  if (height === -1)
-    height = 0x7fffffff;
-
-  bw.writeU32(this.version);
-  bw.writeU32(height);
-  bw.writeI64(this.value);
-  bw.writeVarBytes(this.script.toRaw());
-  bw.writeU8(this.coinbase ? 1 : 0);
-
-  return bw;
-};
-
-/**
- * Serialize the coin.
- * @returns {Buffer|String}
- */
-
-Coin.prototype.toRaw = function toRaw() {
-  const size = this.getSize();
-  return this.toWriter(new StaticWriter(size)).render();
-};
-
-/**
- * Inject properties from serialized buffer writer.
- * @private
- * @param {BufferReader} br
- */
-
-Coin.prototype.fromReader = function fromReader(br) {
-  this.version = br.readU32();
-  this.height = br.readU32();
-  this.value = br.readI64();
-  this.script.fromRaw(br.readVarBytes());
-  this.coinbase = br.readU8() === 1;
-
-  if (this.height === 0x7fffffff)
+    this.version = 1;
     this.height = -1;
+    this.coinbase = false;
+    this.hash = encoding.NULL_HASH;
+    this.index = 0;
 
-  return this;
-};
+    if (options)
+      this.fromOptions(options);
+  }
 
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
+  /**
+   * Inject options into coin.
+   * @private
+   * @param {Object} options
+   */
 
-Coin.prototype.fromRaw = function fromRaw(data) {
-  return this.fromReader(new BufferReader(data));
-};
+  fromOptions(options) {
+    assert(options, 'Coin data is required.');
 
-/**
- * Instantiate a coin from a buffer reader.
- * @param {BufferReader} br
- * @returns {Coin}
- */
+    if (options.version != null) {
+      assert((options.version >>> 0) === options.version,
+        'Version must be a uint32.');
+      this.version = options.version;
+    }
 
-Coin.fromReader = function fromReader(br) {
-  return new Coin().fromReader(br);
-};
+    if (options.height != null) {
+      if (options.height !== -1) {
+        assert((options.height >>> 0) === options.height,
+          'Height must be a uint32.');
+        this.height = options.height;
+      } else {
+        this.height = -1;
+      }
+    }
 
-/**
- * Instantiate a coin from a serialized Buffer.
- * @param {Buffer} data
- * @param {String?} enc - Encoding, can be `'hex'` or null.
- * @returns {Coin}
- */
+    if (options.value != null) {
+      assert(Number.isSafeInteger(options.value) && options.value >= 0,
+        'Value must be a uint64.');
+      this.value = options.value;
+    }
 
-Coin.fromRaw = function fromRaw(data, enc) {
-  if (typeof data === 'string')
-    data = Buffer.from(data, enc);
-  return new Coin().fromRaw(data);
-};
+    if (options.script)
+      this.script.fromOptions(options.script);
 
-/**
- * Inject properties from TX.
- * @param {TX} tx
- * @param {Number} index
- */
+    if (options.coinbase != null) {
+      assert(typeof options.coinbase === 'boolean',
+        'Coinbase must be a boolean.');
+      this.coinbase = options.coinbase;
+    }
 
-Coin.prototype.fromTX = function fromTX(tx, index, height) {
-  assert(typeof index === 'number');
-  assert(typeof height === 'number');
-  assert(index >= 0 && index < tx.outputs.length);
-  this.version = tx.version;
-  this.height = height;
-  this.value = tx.outputs[index].value;
-  this.script = tx.outputs[index].script;
-  this.coinbase = tx.isCoinbase();
-  this.hash = tx.hash('hex');
-  this.index = index;
-  return this;
-};
+    if (options.hash != null) {
+      assert(typeof options.hash === 'string', 'Hash must be a string.');
+      this.hash = options.hash;
+    }
 
-/**
- * Instantiate a coin from a TX
- * @param {TX} tx
- * @param {Number} index - Output index.
- * @returns {Coin}
- */
+    if (options.index != null) {
+      assert((options.index >>> 0) === options.index,
+        'Index must be a uint32.');
+      this.index = options.index;
+    }
 
-Coin.fromTX = function fromTX(tx, index, height) {
-  return new Coin().fromTX(tx, index, height);
-};
+    return this;
+  }
 
-/**
- * Test an object to see if it is a Coin.
- * @param {Object} obj
- * @returns {Boolean}
- */
+  /**
+   * Instantiate Coin from options object.
+   * @private
+   * @param {Object} options
+   */
 
-Coin.isCoin = function isCoin(obj) {
-  return obj instanceof Coin;
-};
+  static fromOptions(options) {
+    return new this().fromOptions(options);
+  }
+
+  /**
+   * Clone the coin.
+   * @private
+   * @returns {Coin}
+   */
+
+  clone() {
+    assert(false, 'Coins are not cloneable.');
+  }
+
+  /**
+   * Calculate number of confirmations since coin was created.
+   * @param {Number?} height - Current chain height. Network
+   * height is used if not passed in.
+   * @return {Number}
+   */
+
+  getDepth(height) {
+    assert(typeof height === 'number', 'Must pass a height.');
+
+    if (this.height === -1)
+      return 0;
+
+    if (height === -1)
+      return 0;
+
+    if (height < this.height)
+      return 0;
+
+    return height - this.height + 1;
+  }
+
+  /**
+   * Serialize coin to a key
+   * suitable for a hash table.
+   * @returns {String}
+   */
+
+  toKey() {
+    return this.hash + this.index;
+  }
+
+  /**
+   * Inject properties from hash table key.
+   * @private
+   * @param {String} key
+   * @returns {Coin}
+   */
+
+  fromKey(key) {
+    assert(key.length > 64);
+    this.hash = key.slice(0, 64);
+    this.index = parseInt(key.slice(64), 10);
+    return this;
+  }
+
+  /**
+   * Instantiate coin from hash table key.
+   * @param {String} key
+   * @returns {Coin}
+   */
+
+  static fromKey(key) {
+    return new this().fromKey(key);
+  }
+
+  /**
+   * Get little-endian hash.
+   * @returns {Hash}
+   */
+
+  rhash() {
+    return encoding.revHex(this.hash);
+  }
+
+  /**
+   * Get little-endian hash.
+   * @returns {Hash}
+   */
+
+  txid() {
+    return this.rhash();
+  }
+
+  /**
+   * Convert the coin to a more user-friendly object.
+   * @returns {Object}
+   */
+
+  inspect() {
+    return {
+      type: this.getType(),
+      version: this.version,
+      height: this.height,
+      value: Amount.btc(this.value),
+      script: this.script,
+      coinbase: this.coinbase,
+      hash: this.hash ? encoding.revHex(this.hash) : null,
+      index: this.index,
+      address: this.getAddress()
+    };
+  }
+
+  /**
+   * Convert the coin to an object suitable
+   * for JSON serialization.
+   * @returns {Object}
+   */
+
+  toJSON() {
+    return this.getJSON();
+  }
+
+  /**
+   * Convert the coin to an object suitable
+   * for JSON serialization. Note that the hash
+   * will be reversed to abide by bitcoind's legacy
+   * of little-endian uint256s.
+   * @param {Network} network
+   * @param {Boolean} minimal
+   * @returns {Object}
+   */
+
+  getJSON(network, minimal) {
+    let addr = this.getAddress();
+
+    network = Network.get(network);
+
+    if (addr)
+      addr = addr.toString(network);
+
+    return {
+      version: this.version,
+      height: this.height,
+      value: this.value,
+      script: this.script.toJSON(),
+      address: addr,
+      coinbase: this.coinbase,
+      hash: !minimal ? this.rhash() : undefined,
+      index: !minimal ? this.index : undefined
+    };
+  }
+
+  /**
+   * Inject JSON properties into coin.
+   * @private
+   * @param {Object} json
+   */
+
+  fromJSON(json) {
+    assert(json, 'Coin data required.');
+    assert((json.version >>> 0) === json.version, 'Version must be a uint32.');
+    assert(json.height === -1 || (json.height >>> 0) === json.height,
+      'Height must be a uint32.');
+    assert(Number.isSafeInteger(json.value) && json.value >= 0,
+      'Value must be a uint64.');
+    assert(typeof json.coinbase === 'boolean', 'Coinbase must be a boolean.');
+
+    this.version = json.version;
+    this.height = json.height;
+    this.value = json.value;
+    this.script.fromJSON(json.script);
+    this.coinbase = json.coinbase;
+
+    if (json.hash != null) {
+      assert(typeof json.hash === 'string', 'Hash must be a string.');
+      assert(json.hash.length === 64, 'Hash must be a string.');
+      assert((json.index >>> 0) === json.index, 'Index must be a uint32.');
+      this.hash = encoding.revHex(json.hash);
+      this.index = json.index;
+    }
+
+    return this;
+  }
+
+  /**
+   * Instantiate an Coin from a jsonified coin object.
+   * @param {Object} json - The jsonified coin object.
+   * @returns {Coin}
+   */
+
+  static fromJSON(json) {
+    return new this().fromJSON(json);
+  }
+
+  /**
+   * Calculate size of coin.
+   * @returns {Number}
+   */
+
+  getSize() {
+    return 17 + this.script.getVarSize();
+  }
+
+  /**
+   * Write the coin to a buffer writer.
+   * @param {BufferWriter} bw
+   */
+
+  toWriter(bw) {
+    let height = this.height;
+
+    if (height === -1)
+      height = 0x7fffffff;
+
+    bw.writeU32(this.version);
+    bw.writeU32(height);
+    bw.writeI64(this.value);
+    bw.writeVarBytes(this.script.toRaw());
+    bw.writeU8(this.coinbase ? 1 : 0);
+
+    return bw;
+  }
+
+  /**
+   * Serialize the coin.
+   * @returns {Buffer|String}
+   */
+
+  toRaw() {
+    const size = this.getSize();
+    return this.toWriter(new StaticWriter(size)).render();
+  }
+
+  /**
+   * Inject properties from serialized buffer writer.
+   * @private
+   * @param {BufferReader} br
+   */
+
+  fromReader(br) {
+    this.version = br.readU32();
+    this.height = br.readU32();
+    this.value = br.readI64();
+    this.script.fromRaw(br.readVarBytes());
+    this.coinbase = br.readU8() === 1;
+
+    if (this.height === 0x7fffffff)
+      this.height = -1;
+
+    return this;
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromRaw(data) {
+    return this.fromReader(new BufferReader(data));
+  }
+
+  /**
+   * Instantiate a coin from a buffer reader.
+   * @param {BufferReader} br
+   * @returns {Coin}
+   */
+
+  static fromReader(br) {
+    return new this().fromReader(br);
+  }
+
+  /**
+   * Instantiate a coin from a serialized Buffer.
+   * @param {Buffer} data
+   * @param {String?} enc - Encoding, can be `'hex'` or null.
+   * @returns {Coin}
+   */
+
+  static fromRaw(data, enc) {
+    if (typeof data === 'string')
+      data = Buffer.from(data, enc);
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Inject properties from TX.
+   * @param {TX} tx
+   * @param {Number} index
+   */
+
+  fromTX(tx, index, height) {
+    assert(typeof index === 'number');
+    assert(typeof height === 'number');
+    assert(index >= 0 && index < tx.outputs.length);
+    this.version = tx.version;
+    this.height = height;
+    this.value = tx.outputs[index].value;
+    this.script = tx.outputs[index].script;
+    this.coinbase = tx.isCoinbase();
+    this.hash = tx.hash('hex');
+    this.index = index;
+    return this;
+  }
+
+  /**
+   * Instantiate a coin from a TX
+   * @param {TX} tx
+   * @param {Number} index - Output index.
+   * @returns {Coin}
+   */
+
+  static fromTX(tx, index, height) {
+    return new this().fromTX(tx, index, height);
+  }
+
+  /**
+   * Test an object to see if it is a Coin.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
+
+  static isCoin(obj) {
+    return obj instanceof Coin;
+  }
+}
 
 /*
  * Expose

lib/primitives/headers.js

@@ -14,262 +14,264 @@ const BufferReader = require('bufio/lib/reader');
 const encoding = require('bufio/lib/encoding');
 
 /**
- * Represents block headers obtained from the network via `headers`.
+ * Headers
+ * Represents block headers obtained
+ * from the network via `headers`.
  * @alias module:primitives.Headers
- * @constructor
  * @extends AbstractBlock
- * @param {NakedBlock} options
  */
 
-function Headers(options) {
-  if (!(this instanceof Headers))
-    return new Headers(options);
+class Headers extends AbstractBlock {
+  /**
+   * Create headers.
+   * @constructor
+   * @param {Object} options
+   */
 
-  AbstractBlock.call(this);
+  constructor(options) {
+    super();
 
-  if (options)
-    this.parseOptions(options);
+    if (options)
+      this.parseOptions(options);
+  }
+
+  /**
+   * Perform non-contextual
+   * verification on the headers.
+   * @returns {Boolean}
+   */
+
+  verifyBody() {
+    return true;
+  }
+
+  /**
+   * Get size of the headers.
+   * @returns {Number}
+   */
+
+  getSize() {
+    return 81;
+  }
+
+  /**
+   * Serialize the headers to a buffer writer.
+   * @param {BufferWriter} bw
+   */
+
+  toWriter(bw) {
+    this.writeHead(bw);
+    bw.writeVarint(0);
+    return bw;
+  }
+
+  /**
+   * Serialize the headers.
+   * @returns {Buffer|String}
+   */
+
+  toRaw() {
+    const size = this.getSize();
+    return this.toWriter(new StaticWriter(size)).render();
+  }
+
+  /**
+   * Inject properties from buffer reader.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromReader(br) {
+    this.readHead(br);
+    br.readVarint();
+    return this;
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromRaw(data) {
+    return this.fromReader(new BufferReader(data));
+  }
+
+  /**
+   * Instantiate headers from buffer reader.
+   * @param {BufferReader} br
+   * @returns {Headers}
+   */
+
+  static fromReader(br) {
+    return new this().fromReader(br);
+  }
+
+  /**
+   * Instantiate headers from serialized data.
+   * @param {Buffer} data
+   * @param {String?} enc - Encoding, can be `'hex'` or null.
+   * @returns {Headers}
+   */
+
+  static fromRaw(data, enc) {
+    if (typeof data === 'string')
+      data = Buffer.from(data, enc);
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Instantiate headers from serialized data.
+   * @param {Buffer} data
+   * @param {String?} enc - Encoding, can be `'hex'` or null.
+   * @returns {Headers}
+   */
+
+  static fromHead(data, enc) {
+    if (typeof data === 'string')
+      data = Buffer.from(data, enc);
+    return new this().fromHead(data);
+  }
+
+  /**
+   * Instantiate headers from a chain entry.
+   * @param {ChainEntry} entry
+   * @returns {Headers}
+   */
+
+  static fromEntry(entry) {
+    const headers = new this();
+    headers.version = entry.version;
+    headers.prevBlock = entry.prevBlock;
+    headers.merkleRoot = entry.merkleRoot;
+    headers.time = entry.time;
+    headers.bits = entry.bits;
+    headers.nonce = entry.nonce;
+    headers._hash = Buffer.from(entry.hash, 'hex');
+    headers._hhash = entry.hash;
+    return headers;
+  }
+
+  /**
+   * Convert the block to a headers object.
+   * @returns {Headers}
+   */
+
+  toHeaders() {
+    return this;
+  }
+
+  /**
+   * Convert the block to a headers object.
+   * @param {Block|MerkleBlock} block
+   * @returns {Headers}
+   */
+
+  static fromBlock(block) {
+    const headers = new this(block);
+    headers._hash = block._hash;
+    headers._hhash = block._hhash;
+    return headers;
+  }
+
+  /**
+   * Convert the block to an object suitable
+   * for JSON serialization.
+   * @returns {Object}
+   */
+
+  toJSON() {
+    return this.getJSON();
+  }
+
+  /**
+   * Convert the block to an object suitable
+   * for JSON serialization. Note that the hashes
+   * will be reversed to abide by bitcoind's legacy
+   * of little-endian uint256s.
+   * @param {Network} network
+   * @param {CoinView} view
+   * @param {Number} height
+   * @returns {Object}
+   */
+
+  getJSON(network, view, height) {
+    return {
+      hash: this.rhash(),
+      height: height,
+      version: this.version,
+      prevBlock: encoding.revHex(this.prevBlock),
+      merkleRoot: encoding.revHex(this.merkleRoot),
+      time: this.time,
+      bits: this.bits,
+      nonce: this.nonce
+    };
+  }
+
+  /**
+   * Inject properties from json object.
+   * @private
+   * @param {Object} json
+   */
+
+  fromJSON(json) {
+    this.parseJSON(json);
+    return this;
+  }
+
+  /**
+   * Instantiate a merkle block from a jsonified block object.
+   * @param {Object} json - The jsonified block object.
+   * @returns {Headers}
+   */
+
+  static fromJSON(json) {
+    return new this().fromJSON(json);
+  }
+
+  /**
+   * Inspect the headers and return a more
+   * user-friendly representation of the data.
+   * @returns {Object}
+   */
+
+  inspect() {
+    return this.format();
+  }
+
+  /**
+   * Inspect the headers and return a more
+   * user-friendly representation of the data.
+   * @param {CoinView} view
+   * @param {Number} height
+   * @returns {Object}
+   */
+
+  format(view, height) {
+    return {
+      hash: this.rhash(),
+      height: height != null ? height : -1,
+      date: util.date(this.time),
+      version: this.version.toString(16),
+      prevBlock: encoding.revHex(this.prevBlock),
+      merkleRoot: encoding.revHex(this.merkleRoot),
+      time: this.time,
+      bits: this.bits,
+      nonce: this.nonce
+    };
+  }
+
+  /**
+   * Test an object to see if it is a Headers object.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
+
+  static isHeaders(obj) {
+    return obj instanceof Headers;
+  }
 }
 
-Object.setPrototypeOf(Headers.prototype, AbstractBlock.prototype);
-
-/**
- * Do non-contextual verification on the headers.
- * @param {Object?} ret - Return object, may be
- * set with properties `reason` and `score`.
- * @returns {Boolean}
- */
-
-Headers.prototype.verifyBody = function verifyBody(ret) {
-  return true;
-};
-
-/**
- * Get size of the headers.
- * @returns {Number}
- */
-
-Headers.prototype.getSize = function getSize() {
-  return 81;
-};
-
-/**
- * Serialize the headers to a buffer writer.
- * @param {BufferWriter} bw
- */
-
-Headers.prototype.toWriter = function toWriter(bw) {
-  this.writeHead(bw);
-  bw.writeVarint(0);
-  return bw;
-};
-
-/**
- * Serialize the headers.
- * @returns {Buffer|String}
- */
-
-Headers.prototype.toRaw = function toRaw() {
-  const size = this.getSize();
-  return this.toWriter(new StaticWriter(size)).render();
-};
-
-/**
- * Inject properties from buffer reader.
- * @private
- * @param {Buffer} data
- */
-
-Headers.prototype.fromReader = function fromReader(br) {
-  this.readHead(br);
-  br.readVarint();
-  return this;
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
-
-Headers.prototype.fromRaw = function fromRaw(data) {
-  return this.fromReader(new BufferReader(data));
-};
-
-/**
- * Instantiate headers from buffer reader.
- * @param {BufferReader} br
- * @returns {Headers}
- */
-
-Headers.fromReader = function fromReader(br) {
-  return new Headers().fromReader(br);
-};
-
-/**
- * Instantiate headers from serialized data.
- * @param {Buffer} data
- * @param {String?} enc - Encoding, can be `'hex'` or null.
- * @returns {Headers}
- */
-
-Headers.fromRaw = function fromRaw(data, enc) {
-  if (typeof data === 'string')
-    data = Buffer.from(data, enc);
-  return new Headers().fromRaw(data);
-};
-
-/**
- * Instantiate headers from serialized data.
- * @param {Buffer} data
- * @param {String?} enc - Encoding, can be `'hex'` or null.
- * @returns {Headers}
- */
-
-Headers.fromHead = function fromHead(data, enc) {
-  if (typeof data === 'string')
-    data = Buffer.from(data, enc);
-  return new Headers().fromHead(data);
-};
-
-/**
- * Instantiate headers from a chain entry.
- * @param {ChainEntry} entry
- * @returns {Headers}
- */
-
-Headers.fromEntry = function fromEntry(entry) {
-  const headers = new Headers();
-  headers.version = entry.version;
-  headers.prevBlock = entry.prevBlock;
-  headers.merkleRoot = entry.merkleRoot;
-  headers.time = entry.time;
-  headers.bits = entry.bits;
-  headers.nonce = entry.nonce;
-  headers._hash = Buffer.from(entry.hash, 'hex');
-  headers._hhash = entry.hash;
-  return headers;
-};
-
-/**
- * Convert the block to a headers object.
- * @returns {Headers}
- */
-
-Headers.prototype.toHeaders = function toHeaders() {
-  return this;
-};
-
-/**
- * Convert the block to a headers object.
- * @param {Block|MerkleBlock} block
- * @returns {Headers}
- */
-
-Headers.fromBlock = function fromBlock(block) {
-  const headers = new Headers(block);
-  headers._hash = block._hash;
-  headers._hhash = block._hhash;
-  return headers;
-};
-
-/**
- * Convert the block to an object suitable
- * for JSON serialization.
- * @returns {Object}
- */
-
-Headers.prototype.toJSON = function toJSON() {
-  return this.getJSON();
-};
-
-/**
- * Convert the block to an object suitable
- * for JSON serialization. Note that the hashes
- * will be reversed to abide by bitcoind's legacy
- * of little-endian uint256s.
- * @param {Network} network
- * @param {CoinView} view
- * @param {Number} height
- * @returns {Object}
- */
-
-Headers.prototype.getJSON = function getJSON(network, view, height) {
-  return {
-    hash: this.rhash(),
-    height: height,
-    version: this.version,
-    prevBlock: encoding.revHex(this.prevBlock),
-    merkleRoot: encoding.revHex(this.merkleRoot),
-    time: this.time,
-    bits: this.bits,
-    nonce: this.nonce
-  };
-};
-
-/**
- * Inject properties from json object.
- * @private
- * @param {Object} json
- */
-
-Headers.prototype.fromJSON = function fromJSON(json) {
-  this.parseJSON(json);
-  return this;
-};
-
-/**
- * Instantiate a merkle block from a jsonified block object.
- * @param {Object} json - The jsonified block object.
- * @returns {Headers}
- */
-
-Headers.fromJSON = function fromJSON(json) {
-  return new Headers().fromJSON(json);
-};
-
-/**
- * Inspect the headers and return a more
- * user-friendly representation of the data.
- * @returns {Object}
- */
-
-Headers.prototype.inspect = function inspect() {
-  return this.format();
-};
-
-/**
- * Inspect the headers and return a more
- * user-friendly representation of the data.
- * @param {CoinView} view
- * @param {Number} height
- * @returns {Object}
- */
-
-Headers.prototype.format = function format(view, height) {
-  return {
-    hash: this.rhash(),
-    height: height != null ? height : -1,
-    date: util.date(this.time),
-    version: this.version.toString(16),
-    prevBlock: encoding.revHex(this.prevBlock),
-    merkleRoot: encoding.revHex(this.merkleRoot),
-    time: this.time,
-    bits: this.bits,
-    nonce: this.nonce
-  };
-};
-
-/**
- * Test an object to see if it is a Headers object.
- * @param {Object} obj
- * @returns {Boolean}
- */
-
-Headers.isHeaders = function isHeaders(obj) {
-  return obj instanceof Headers;
-};
-
 /*
  * Expose
  */

lib/primitives/input.js

@@ -16,502 +16,507 @@ const StaticWriter = require('bufio/lib/staticwriter');
 const BufferReader = require('bufio/lib/reader');
 
 /**
+ * Input
  * Represents a transaction input.
  * @alias module:primitives.Input
- * @constructor
- * @param {NakedInput} options
  * @property {Outpoint} prevout - Outpoint.
  * @property {Script} script - Input script / scriptSig.
  * @property {Number} sequence - nSequence.
  * @property {Witness} witness - Witness (empty if not present).
  */
 
-function Input(options) {
-  if (!(this instanceof Input))
-    return new Input(options);
+class Input {
+  /**
+   * Create transaction input.
+   * @constructor
+   * @param {Object} options
+   */
 
-  this.prevout = new Outpoint();
-  this.script = new Script();
-  this.sequence = 0xffffffff;
-  this.witness = new Witness();
+  constructor(options) {
+    this.prevout = new Outpoint();
+    this.script = new Script();
+    this.sequence = 0xffffffff;
+    this.witness = new Witness();
 
-  if (options)
-    this.fromOptions(options);
-}
+    if (options)
+      this.fromOptions(options);
+  }
 
-/**
- * Inject properties from options object.
- * @private
- * @param {Object} options
- */
+  /**
+   * Inject properties from options object.
+   * @private
+   * @param {Object} options
+   */
 
-Input.prototype.fromOptions = function fromOptions(options) {
-  assert(options, 'Input data is required.');
+  fromOptions(options) {
+    assert(options, 'Input data is required.');
 
-  this.prevout.fromOptions(options.prevout);
+    this.prevout.fromOptions(options.prevout);
 
-  if (options.script)
-    this.script.fromOptions(options.script);
+    if (options.script)
+      this.script.fromOptions(options.script);
 
-  if (options.sequence != null) {
-    assert((options.sequence >>> 0) === options.sequence,
+    if (options.sequence != null) {
+      assert((options.sequence >>> 0) === options.sequence,
+        'Sequence must be a uint32.');
+      this.sequence = options.sequence;
+    }
+
+    if (options.witness)
+      this.witness.fromOptions(options.witness);
+
+    return this;
+  }
+
+  /**
+   * Instantiate an Input from options object.
+   * @param {NakedInput} options
+   * @returns {Input}
+   */
+
+  static fromOptions(options) {
+    return new this().fromOptions(options);
+  }
+
+  /**
+   * Clone the input.
+   * @returns {Input}
+   */
+
+  clone() {
+    const input = new this.constructor();
+    input.prevout = this.prevout;
+    input.script.inject(this.script);
+    input.sequence = this.sequence;
+    input.witness.inject(this.witness);
+    return input;
+  }
+
+  /**
+   * Test equality against another input.
+   * @param {Input} input
+   * @returns {Boolean}
+   */
+
+  equals(input) {
+    assert(Input.isInput(input));
+    return this.prevout.equals(input.prevout);
+  }
+
+  /**
+   * Compare against another input (BIP69).
+   * @param {Input} input
+   * @returns {Number}
+   */
+
+  compare(input) {
+    assert(Input.isInput(input));
+    return this.prevout.compare(input.prevout);
+  }
+
+  /**
+   * Get the previous output script type as a string.
+   * Will "guess" based on the input script and/or
+   * witness if coin is not available.
+   * @param {Coin?} coin
+   * @returns {ScriptType} type
+   */
+
+  getType(coin) {
+    if (this.isCoinbase())
+      return 'coinbase';
+
+    if (coin)
+      return coin.getType();
+
+    let type;
+
+    if (this.witness.items.length > 0)
+      type = this.witness.getInputType();
+    else
+      type = this.script.getInputType();
+
+    return Script.typesByVal[type].toLowerCase();
+  }
+
+  /**
+   * Get the redeem script. Will attempt to resolve nested
+   * redeem scripts if witnessscripthash is behind a scripthash.
+   * @param {Coin?} coin
+   * @returns {Script?} Redeem script.
+   */
+
+  getRedeem(coin) {
+    if (this.isCoinbase())
+      return null;
+
+    if (!coin) {
+      if (this.witness.isScripthashInput())
+        return this.witness.getRedeem();
+
+      if (this.script.isScripthashInput())
+        return this.script.getRedeem();
+
+      return null;
+    }
+
+    let prev = coin.script;
+    let redeem = null;
+
+    if (prev.isScripthash()) {
+      prev = this.script.getRedeem();
+      redeem = prev;
+    }
+
+    if (prev && prev.isWitnessScripthash()) {
+      prev = this.witness.getRedeem();
+      redeem = prev;
+    }
+
+    return redeem;
+  }
+
+  /**
+   * Get the redeem script type.
+   * @param {Coin?} coin
+   * @returns {String} subtype
+   */
+
+  getSubtype(coin) {
+    if (this.isCoinbase())
+      return null;
+
+    const redeem = this.getRedeem(coin);
+
+    if (!redeem)
+      return null;
+
+    const type = redeem.getType();
+
+    return Script.typesByVal[type].toLowerCase();
+  }
+
+  /**
+   * Get the previous output script's address. Will "guess"
+   * based on the input script and/or witness if coin
+   * is not available.
+   * @param {Coin?} coin
+   * @returns {Address?} addr
+   */
+
+  getAddress(coin) {
+    if (this.isCoinbase())
+      return null;
+
+    if (coin)
+      return coin.getAddress();
+
+    if (this.witness.items.length > 0)
+      return this.witness.getInputAddress();
+
+    return this.script.getInputAddress();
+  }
+
+  /**
+   * Get the address hash.
+   * @param {String?} enc
+   * @returns {Hash} hash
+   */
+
+  getHash(enc) {
+    const addr = this.getAddress();
+
+    if (!addr)
+      return null;
+
+    return addr.getHash(enc);
+  }
+
+  /**
+   * Test to see if nSequence is equal to uint32max.
+   * @returns {Boolean}
+   */
+
+  isFinal() {
+    return this.sequence === 0xffffffff;
+  }
+
+  /**
+   * Test to see if nSequence is less than 0xfffffffe.
+   * @returns {Boolean}
+   */
+
+  isRBF() {
+    return this.sequence < 0xfffffffe;
+  }
+
+  /**
+   * Test to see if outpoint is null.
+   * @returns {Boolean}
+   */
+
+  isCoinbase() {
+    return this.prevout.isNull();
+  }
+
+  /**
+   * Convert the input to a more user-friendly object.
+   * @returns {Object}
+   */
+
+  inspect() {
+    return this.format();
+  }
+
+  /**
+   * Convert the input to a more user-friendly object.
+   * @param {Coin?} coin
+   * @returns {Object}
+   */
+
+  format(coin) {
+    return {
+      type: this.getType(coin),
+      subtype: this.getSubtype(coin),
+      address: this.getAddress(coin),
+      script: this.script,
+      witness: this.witness,
+      redeem: this.getRedeem(coin),
+      sequence: this.sequence,
+      prevout: this.prevout,
+      coin: coin || null
+    };
+  }
+
+  /**
+   * Convert the input to an object suitable
+   * for JSON serialization.
+   * @returns {Object}
+   */
+
+  toJSON(network, coin) {
+    return this.getJSON();
+  }
+
+  /**
+   * Convert the input to an object suitable
+   * for JSON serialization. Note that the hashes
+   * will be reversed to abide by bitcoind's legacy
+   * of little-endian uint256s.
+   * @param {Network} network
+   * @param {Coin} coin
+   * @returns {Object}
+   */
+
+  getJSON(network, coin) {
+    network = Network.get(network);
+
+    let addr;
+    if (!coin) {
+      addr = this.getAddress();
+      if (addr)
+        addr = addr.toString(network);
+    }
+
+    return {
+      prevout: this.prevout.toJSON(),
+      script: this.script.toJSON(),
+      witness: this.witness.toJSON(),
+      sequence: this.sequence,
+      address: addr,
+      coin: coin ? coin.getJSON(network, true) : undefined
+    };
+  }
+
+  /**
+   * Inject properties from a JSON object.
+   * @private
+   * @param {Object} json
+   */
+
+  fromJSON(json) {
+    assert(json, 'Input data is required.');
+    assert((json.sequence >>> 0) === json.sequence,
       'Sequence must be a uint32.');
-    this.sequence = options.sequence;
+    this.prevout.fromJSON(json.prevout);
+    this.script.fromJSON(json.script);
+    this.witness.fromJSON(json.witness);
+    this.sequence = json.sequence;
+    return this;
   }
 
-  if (options.witness)
-    this.witness.fromOptions(options.witness);
+  /**
+   * Instantiate an Input from a jsonified input object.
+   * @param {Object} json - The jsonified input object.
+   * @returns {Input}
+   */
 
-  return this;
-};
-
-/**
- * Instantiate an Input from options object.
- * @param {NakedInput} options
- * @returns {Input}
- */
-
-Input.fromOptions = function fromOptions(options) {
-  return new Input().fromOptions(options);
-};
-
-/**
- * Clone the input.
- * @returns {Input}
- */
-
-Input.prototype.clone = function clone() {
-  const input = new Input();
-  input.prevout = this.prevout;
-  input.script.inject(this.script);
-  input.sequence = this.sequence;
-  input.witness.inject(this.witness);
-  return input;
-};
-
-/**
- * Test equality against another input.
- * @param {Input} input
- * @returns {Boolean}
- */
-
-Input.prototype.equals = function equals(input) {
-  assert(Input.isInput(input));
-  return this.prevout.equals(input.prevout);
-};
-
-/**
- * Compare against another input (BIP69).
- * @param {Input} input
- * @returns {Number}
- */
-
-Input.prototype.compare = function compare(input) {
-  assert(Input.isInput(input));
-  return this.prevout.compare(input.prevout);
-};
-
-/**
- * Get the previous output script type as a string.
- * Will "guess" based on the input script and/or
- * witness if coin is not available.
- * @param {Coin?} coin
- * @returns {ScriptType} type
- */
-
-Input.prototype.getType = function getType(coin) {
-  if (this.isCoinbase())
-    return 'coinbase';
-
-  if (coin)
-    return coin.getType();
-
-  let type;
-
-  if (this.witness.items.length > 0)
-    type = this.witness.getInputType();
-  else
-    type = this.script.getInputType();
-
-  return Script.typesByVal[type].toLowerCase();
-};
-
-/**
- * Get the redeem script. Will attempt to resolve nested
- * redeem scripts if witnessscripthash is behind a scripthash.
- * @param {Coin?} coin
- * @returns {Script?} Redeem script.
- */
-
-Input.prototype.getRedeem = function getRedeem(coin) {
-  if (this.isCoinbase())
-    return null;
-
-  if (!coin) {
-    if (this.witness.isScripthashInput())
-      return this.witness.getRedeem();
-
-    if (this.script.isScripthashInput())
-      return this.script.getRedeem();
-
-    return null;
+  static fromJSON(json) {
+    return new this().fromJSON(json);
   }
 
-  let prev = coin.script;
-  let redeem = null;
+  /**
+   * Calculate size of serialized input.
+   * @returns {Number}
+   */
 
-  if (prev.isScripthash()) {
-    prev = this.script.getRedeem();
-    redeem = prev;
+  getSize() {
+    return 40 + this.script.getVarSize();
   }
 
-  if (prev && prev.isWitnessScripthash()) {
-    prev = this.witness.getRedeem();
-    redeem = prev;
+  /**
+   * Serialize the input.
+   * @param {String?} enc - Encoding, can be `'hex'` or null.
+   * @returns {Buffer|String}
+   */
+
+  toRaw() {
+    const size = this.getSize();
+    return this.toWriter(new StaticWriter(size)).render();
   }
 
-  return redeem;
-};
+  /**
+   * Write the input to a buffer writer.
+   * @param {BufferWriter} bw
+   */
 
-/**
- * Get the redeem script type.
- * @param {Coin?} coin
- * @returns {String} subtype
- */
-
-Input.prototype.getSubtype = function getSubtype(coin) {
-  if (this.isCoinbase())
-    return null;
-
-  const redeem = this.getRedeem(coin);
-
-  if (!redeem)
-    return null;
-
-  const type = redeem.getType();
-
-  return Script.typesByVal[type].toLowerCase();
-};
-
-/**
- * Get the previous output script's address. Will "guess"
- * based on the input script and/or witness if coin
- * is not available.
- * @param {Coin?} coin
- * @returns {Address?} addr
- */
-
-Input.prototype.getAddress = function getAddress(coin) {
-  if (this.isCoinbase())
-    return null;
-
-  if (coin)
-    return coin.getAddress();
-
-  if (this.witness.items.length > 0)
-    return this.witness.getInputAddress();
-
-  return this.script.getInputAddress();
-};
-
-/**
- * Get the address hash.
- * @param {String?} enc
- * @returns {Hash} hash
- */
-
-Input.prototype.getHash = function getHash(enc) {
-  const addr = this.getAddress();
-
-  if (!addr)
-    return null;
-
-  return addr.getHash(enc);
-};
-
-/**
- * Test to see if nSequence is equal to uint32max.
- * @returns {Boolean}
- */
-
-Input.prototype.isFinal = function isFinal() {
-  return this.sequence === 0xffffffff;
-};
-
-/**
- * Test to see if nSequence is less than 0xfffffffe.
- * @returns {Boolean}
- */
-
-Input.prototype.isRBF = function isRBF() {
-  return this.sequence < 0xfffffffe;
-};
-
-/**
- * Test to see if outpoint is null.
- * @returns {Boolean}
- */
-
-Input.prototype.isCoinbase = function isCoinbase() {
-  return this.prevout.isNull();
-};
-
-/**
- * Convert the input to a more user-friendly object.
- * @returns {Object}
- */
-
-Input.prototype.inspect = function inspect() {
-  return this.format();
-};
-
-/**
- * Convert the input to a more user-friendly object.
- * @param {Coin?} coin
- * @returns {Object}
- */
-
-Input.prototype.format = function format(coin) {
-  return {
-    type: this.getType(coin),
-    subtype: this.getSubtype(coin),
-    address: this.getAddress(coin),
-    script: this.script,
-    witness: this.witness,
-    redeem: this.getRedeem(coin),
-    sequence: this.sequence,
-    prevout: this.prevout,
-    coin: coin || null
-  };
-};
-
-/**
- * Convert the input to an object suitable
- * for JSON serialization.
- * @returns {Object}
- */
-
-Input.prototype.toJSON = function toJSON(network, coin) {
-  return this.getJSON();
-};
-
-/**
- * Convert the input to an object suitable
- * for JSON serialization. Note that the hashes
- * will be reversed to abide by bitcoind's legacy
- * of little-endian uint256s.
- * @param {Network} network
- * @param {Coin} coin
- * @returns {Object}
- */
-
-Input.prototype.getJSON = function getJSON(network, coin) {
-  network = Network.get(network);
-
-  let addr;
-  if (!coin) {
-    addr = this.getAddress();
-    if (addr)
-      addr = addr.toString(network);
+  toWriter(bw) {
+    this.prevout.toWriter(bw);
+    bw.writeVarBytes(this.script.toRaw());
+    bw.writeU32(this.sequence);
+    return bw;
   }
 
-  return {
-    prevout: this.prevout.toJSON(),
-    script: this.script.toJSON(),
-    witness: this.witness.toJSON(),
-    sequence: this.sequence,
-    address: addr,
-    coin: coin ? coin.getJSON(network, true) : undefined
-  };
-};
+  /**
+   * Inject properties from buffer reader.
+   * @private
+   * @param {BufferReader} br
+   */
 
-/**
- * Inject properties from a JSON object.
- * @private
- * @param {Object} json
- */
+  fromReader(br) {
+    this.prevout.fromReader(br);
+    this.script.fromRaw(br.readVarBytes());
+    this.sequence = br.readU32();
+    return this;
+  }
 
-Input.prototype.fromJSON = function fromJSON(json) {
-  assert(json, 'Input data is required.');
-  assert((json.sequence >>> 0) === json.sequence, 'Sequence must be a uint32.');
-  this.prevout.fromJSON(json.prevout);
-  this.script.fromJSON(json.script);
-  this.witness.fromJSON(json.witness);
-  this.sequence = json.sequence;
-  return this;
-};
+  /**
+   * Inject properties from serialized data.
+   * @param {Buffer} data
+   */
 
-/**
- * Instantiate an Input from a jsonified input object.
- * @param {Object} json - The jsonified input object.
- * @returns {Input}
- */
+  fromRaw(data) {
+    return this.fromReader(new BufferReader(data));
+  }
 
-Input.fromJSON = function fromJSON(json) {
-  return new Input().fromJSON(json);
-};
+  /**
+   * Instantiate an input from a buffer reader.
+   * @param {BufferReader} br
+   * @returns {Input}
+   */
 
-/**
- * Calculate size of serialized input.
- * @returns {Number}
- */
+  static fromReader(br) {
+    return new this().fromReader(br);
+  }
 
-Input.prototype.getSize = function getSize() {
-  return 40 + this.script.getVarSize();
-};
+  /**
+   * Instantiate an input from a serialized Buffer.
+   * @param {Buffer} data
+   * @param {String?} enc - Encoding, can be `'hex'` or null.
+   * @returns {Input}
+   */
 
-/**
- * Serialize the input.
- * @param {String?} enc - Encoding, can be `'hex'` or null.
- * @returns {Buffer|String}
- */
+  static fromRaw(data, enc) {
+    if (typeof data === 'string')
+      data = Buffer.from(data, enc);
+    return new this().fromRaw(data);
+  }
 
-Input.prototype.toRaw = function toRaw() {
-  const size = this.getSize();
-  return this.toWriter(new StaticWriter(size)).render();
-};
+  /**
+   * Inject properties from outpoint.
+   * @private
+   * @param {Outpoint} outpoint
+   */
 
-/**
- * Write the input to a buffer writer.
- * @param {BufferWriter} bw
- */
+  fromOutpoint(outpoint) {
+    assert(typeof outpoint.hash === 'string');
+    assert(typeof outpoint.index === 'number');
+    this.prevout.hash = outpoint.hash;
+    this.prevout.index = outpoint.index;
+    return this;
+  }
 
-Input.prototype.toWriter = function toWriter(bw) {
-  this.prevout.toWriter(bw);
-  bw.writeVarBytes(this.script.toRaw());
-  bw.writeU32(this.sequence);
-  return bw;
-};
+  /**
+   * Instantiate input from outpoint.
+   * @param {Outpoint}
+   * @returns {Input}
+   */
 
-/**
- * Inject properties from buffer reader.
- * @private
- * @param {BufferReader} br
- */
+  static fromOutpoint(outpoint) {
+    return new this().fromOutpoint(outpoint);
+  }
 
-Input.prototype.fromReader = function fromReader(br) {
-  this.prevout.fromReader(br);
-  this.script.fromRaw(br.readVarBytes());
-  this.sequence = br.readU32();
-  return this;
-};
+  /**
+   * Inject properties from coin.
+   * @private
+   * @param {Coin} coin
+   */
 
-/**
- * Inject properties from serialized data.
- * @param {Buffer} data
- */
+  fromCoin(coin) {
+    assert(typeof coin.hash === 'string');
+    assert(typeof coin.index === 'number');
+    this.prevout.hash = coin.hash;
+    this.prevout.index = coin.index;
+    return this;
+  }
 
-Input.prototype.fromRaw = function fromRaw(data) {
-  return this.fromReader(new BufferReader(data));
-};
+  /**
+   * Instantiate input from coin.
+   * @param {Coin}
+   * @returns {Input}
+   */
 
-/**
- * Instantiate an input from a buffer reader.
- * @param {BufferReader} br
- * @returns {Input}
- */
+  static fromCoin(coin) {
+    return new this().fromCoin(coin);
+  }
 
-Input.fromReader = function fromReader(br) {
-  return new Input().fromReader(br);
-};
+  /**
+   * Inject properties from transaction.
+   * @private
+   * @param {TX} tx
+   * @param {Number} index
+   */
 
-/**
- * Instantiate an input from a serialized Buffer.
- * @param {Buffer} data
- * @param {String?} enc - Encoding, can be `'hex'` or null.
- * @returns {Input}
- */
+  fromTX(tx, index) {
+    assert(tx);
+    assert(typeof index === 'number');
+    assert(index >= 0 && index < tx.outputs.length);
+    this.prevout.hash = tx.hash('hex');
+    this.prevout.index = index;
+    return this;
+  }
 
-Input.fromRaw = function fromRaw(data, enc) {
-  if (typeof data === 'string')
-    data = Buffer.from(data, enc);
-  return new Input().fromRaw(data);
-};
+  /**
+   * Instantiate input from tx.
+   * @param {TX} tx
+   * @param {Number} index
+   * @returns {Input}
+   */
 
-/**
- * Inject properties from outpoint.
- * @private
- * @param {Outpoint} outpoint
- */
+  static fromTX(tx, index) {
+    return new this().fromTX(tx, index);
+  }
 
-Input.prototype.fromOutpoint = function fromOutpoint(outpoint) {
-  assert(typeof outpoint.hash === 'string');
-  assert(typeof outpoint.index === 'number');
-  this.prevout.hash = outpoint.hash;
-  this.prevout.index = outpoint.index;
-  return this;
-};
+  /**
+   * Test an object to see if it is an Input.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
 
-/**
- * Instantiate input from outpoint.
- * @param {Outpoint}
- * @returns {Input}
- */
-
-Input.fromOutpoint = function fromOutpoint(outpoint) {
-  return new Input().fromOutpoint(outpoint);
-};
-
-/**
- * Inject properties from coin.
- * @private
- * @param {Coin} coin
- */
-
-Input.prototype.fromCoin = function fromCoin(coin) {
-  assert(typeof coin.hash === 'string');
-  assert(typeof coin.index === 'number');
-  this.prevout.hash = coin.hash;
-  this.prevout.index = coin.index;
-  return this;
-};
-
-/**
- * Instantiate input from coin.
- * @param {Coin}
- * @returns {Input}
- */
-
-Input.fromCoin = function fromCoin(coin) {
-  return new Input().fromCoin(coin);
-};
-
-/**
- * Inject properties from transaction.
- * @private
- * @param {TX} tx
- * @param {Number} index
- */
-
-Input.prototype.fromTX = function fromTX(tx, index) {
-  assert(tx);
-  assert(typeof index === 'number');
-  assert(index >= 0 && index < tx.outputs.length);
-  this.prevout.hash = tx.hash('hex');
-  this.prevout.index = index;
-  return this;
-};
-
-/**
- * Instantiate input from tx.
- * @param {TX} tx
- * @param {Number} index
- * @returns {Input}
- */
-
-Input.fromTX = function fromTX(tx, index) {
-  return new Input().fromTX(tx, index);
-};
-
-/**
- * Test an object to see if it is an Input.
- * @param {Object} obj
- * @returns {Boolean}
- */
-
-Input.isInput = function isInput(obj) {
-  return obj instanceof Input;
-};
+  static isInput(obj) {
+    return obj instanceof Input;
+  }
+}
 
 /*
  * Expose

lib/primitives/invitem.js

@@ -15,18 +15,146 @@ const encoding = require('bufio/lib/encoding');
  * Inv Item
  * @alias module:primitives.InvItem
  * @constructor
- * @param {Number} type
- * @param {Hash} hash
  * @property {InvType} type
  * @property {Hash} hash
  */
 
-function InvItem(type, hash) {
-  if (!(this instanceof InvItem))
-    return new InvItem(type, hash);
+class InvItem {
+  /**
+   * Create an inv item.
+   * @constructor
+   * @param {Number} type
+   * @param {Hash} hash
+   */
 
-  this.type = type;
-  this.hash = hash;
+  constructor(type, hash) {
+    this.type = type;
+    this.hash = hash;
+  }
+
+  /**
+   * Write inv item to buffer writer.
+   * @param {BufferWriter} bw
+   */
+
+  getSize() {
+    return 36;
+  }
+
+  /**
+   * Write inv item to buffer writer.
+   * @param {BufferWriter} bw
+   */
+
+  toWriter(bw) {
+    bw.writeU32(this.type);
+    bw.writeHash(this.hash);
+    return bw;
+  }
+
+  /**
+   * Serialize inv item.
+   * @returns {Buffer}
+   */
+
+  toRaw() {
+    return this.toWriter(new StaticWriter(36)).render();
+  }
+
+  /**
+   * Inject properties from buffer reader.
+   * @private
+   * @param {BufferReader} br
+   */
+
+  fromReader(br) {
+    this.type = br.readU32();
+    this.hash = br.readHash('hex');
+    return this;
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @param {Buffer} data
+   */
+
+  fromRaw(data) {
+    return this.fromReader(new BufferReader(data));
+  }
+
+  /**
+   * Instantiate inv item from buffer reader.
+   * @param {BufferReader} br
+   * @returns {InvItem}
+   */
+
+  static fromReader(br) {
+    return new this().fromReader(br);
+  }
+
+  /**
+   * Instantiate inv item from serialized data.
+   * @param {Buffer} data
+   * @param {String?} enc
+   * @returns {InvItem}
+   */
+
+  static fromRaw(data, enc) {
+    if (typeof data === 'string')
+      data = Buffer.from(data, enc);
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Test whether the inv item is a block.
+   * @returns {Boolean}
+   */
+
+  isBlock() {
+    switch (this.type) {
+      case InvItem.types.BLOCK:
+      case InvItem.types.WITNESS_BLOCK:
+      case InvItem.types.FILTERED_BLOCK:
+      case InvItem.types.WITNESS_FILTERED_BLOCK:
+      case InvItem.types.CMPCT_BLOCK:
+        return true;
+      default:
+        return false;
+    }
+  }
+
+  /**
+   * Test whether the inv item is a tx.
+   * @returns {Boolean}
+   */
+
+  isTX() {
+    switch (this.type) {
+      case InvItem.types.TX:
+      case InvItem.types.WITNESS_TX:
+        return true;
+      default:
+        return false;
+    }
+  }
+
+  /**
+   * Test whether the inv item has the witness bit set.
+   * @returns {Boolean}
+   */
+
+  hasWitness() {
+    return (this.type & InvItem.WITNESS_FLAG) !== 0;
+  }
+
+  /**
+   * Get little-endian hash.
+   * @returns {Hash}
+   */
+
+  rhash() {
+    return encoding.revHex(this.hash);
+  }
 }
 
 /**
@@ -36,7 +164,6 @@ function InvItem(type, hash) {
  */
 
 InvItem.types = {
-  ERROR: 0,
   TX: 1,
   BLOCK: 2,
   FILTERED_BLOCK: 3,
@@ -52,7 +179,6 @@ InvItem.types = {
  */
 
 InvItem.typesByVal = {
-  0: 'ERROR',
   1: 'TX',
   2: 'BLOCK',
   3: 'FILTERED_BLOCK',
@@ -70,130 +196,6 @@ InvItem.typesByVal = {
 
 InvItem.WITNESS_FLAG = 1 << 30;
 
-/**
- * Write inv item to buffer writer.
- * @param {BufferWriter} bw
- */
-
-InvItem.prototype.getSize = function getSize() {
-  return 36;
-};
-
-/**
- * Write inv item to buffer writer.
- * @param {BufferWriter} bw
- */
-
-InvItem.prototype.toWriter = function toWriter(bw) {
-  bw.writeU32(this.type);
-  bw.writeHash(this.hash);
-  return bw;
-};
-
-/**
- * Serialize inv item.
- * @returns {Buffer}
- */
-
-InvItem.prototype.toRaw = function toRaw() {
-  return this.toWriter(new StaticWriter(36)).render();
-};
-
-/**
- * Inject properties from buffer reader.
- * @private
- * @param {BufferReader} br
- */
-
-InvItem.prototype.fromReader = function fromReader(br) {
-  this.type = br.readU32();
-  this.hash = br.readHash('hex');
-  return this;
-};
-
-/**
- * Inject properties from serialized data.
- * @param {Buffer} data
- */
-
-InvItem.prototype.fromRaw = function fromRaw(data) {
-  return this.fromReader(new BufferReader(data));
-};
-
-/**
- * Instantiate inv item from buffer reader.
- * @param {BufferReader} br
- * @returns {InvItem}
- */
-
-InvItem.fromReader = function fromReader(br) {
-  return new InvItem().fromReader(br);
-};
-
-/**
- * Instantiate inv item from serialized data.
- * @param {Buffer} data
- * @param {String?} enc
- * @returns {InvItem}
- */
-
-InvItem.fromRaw = function fromRaw(data, enc) {
-  if (typeof data === 'string')
-    data = Buffer.from(data, enc);
-  return new InvItem().fromRaw(data);
-};
-
-/**
- * Test whether the inv item is a block.
- * @returns {Boolean}
- */
-
-InvItem.prototype.isBlock = function isBlock() {
-  switch (this.type) {
-    case InvItem.types.BLOCK:
-    case InvItem.types.WITNESS_BLOCK:
-    case InvItem.types.FILTERED_BLOCK:
-    case InvItem.types.WITNESS_FILTERED_BLOCK:
-    case InvItem.types.CMPCT_BLOCK:
-      return true;
-    default:
-      return false;
-  }
-};
-
-/**
- * Test whether the inv item is a tx.
- * @returns {Boolean}
- */
-
-InvItem.prototype.isTX = function isTX() {
-  switch (this.type) {
-    case InvItem.types.TX:
-    case InvItem.types.WITNESS_TX:
-      return true;
-    default:
-      return false;
-  }
-};
-
-/**
- * Test whether the inv item has the witness bit set.
- * @returns {Boolean}
- */
-
-InvItem.prototype.hasWitness = function hasWitness() {
-  return (this.type & InvItem.WITNESS_FLAG) !== 0;
-};
-
-/**
- * Get little-endian hash.
- * @returns {Hash}
- */
-
-InvItem.prototype.rhash = function rhash() {
-  return encoding.revHex(this.hash);
-};
-
 /*
  * Expose
  */

lib/primitives/memblock.js

@@ -15,6 +15,7 @@ const BufferReader = require('bufio/lib/reader');
 const DUMMY = Buffer.alloc(0);
 
 /**
+ * Mem Block
  * A block object which is essentially a "placeholder"
  * for a full {@link Block} object. The v8 garbage
  * collector's head will explode if there is too much
@@ -31,189 +32,190 @@ const DUMMY = Buffer.alloc(0);
  * 500mb of blocks on the js heap would not be a good
  * thing.
  * @alias module:primitives.MemBlock
- * @constructor
- * @param {NakedBlock} options
+ * @extends AbstractBlock
  */
 
-function MemBlock() {
-  if (!(this instanceof MemBlock))
-    return new MemBlock();
+class MemBlock extends AbstractBlock {
+  /**
+   * Create a mem block.
+   * @constructor
+   */
 
-  AbstractBlock.call(this);
+  constructor() {
+    super();
 
-  this._raw = DUMMY;
+    this._raw = DUMMY;
+  }
+
+  /**
+   * Test whether the block is a memblock.
+   * @returns {Boolean}
+   */
+
+  isMemory() {
+    return true;
+  }
+
+  /**
+   * Serialize the block headers.
+   * @returns {Buffer}
+   */
+
+  toHead() {
+    return this._raw.slice(0, 80);
+  }
+
+  /**
+   * Get the full block size.
+   * @returns {Number}
+   */
+
+  getSize() {
+    return this._raw.length;
+  }
+
+  /**
+   * Verify the block.
+   * @returns {Boolean}
+   */
+
+  verifyBody() {
+    return true;
+  }
+
+  /**
+   * Retrieve the coinbase height
+   * from the coinbase input script.
+   * @returns {Number} height (-1 if not present).
+   */
+
+  getCoinbaseHeight() {
+    if (this.version < 2)
+      return -1;
+
+    try {
+      return this.parseCoinbaseHeight();
+    } catch (e) {
+      return -1;
+    }
+  }
+
+  /**
+   * Parse the coinbase height
+   * from the coinbase input script.
+   * @private
+   * @returns {Number} height (-1 if not present).
+   */
+
+  parseCoinbaseHeight() {
+    const br = new BufferReader(this._raw, true);
+
+    br.seek(80);
+
+    const txCount = br.readVarint();
+
+    if (txCount === 0)
+      return -1;
+
+    br.seek(4);
+
+    let inCount = br.readVarint();
+
+    if (inCount === 0) {
+      if (br.readU8() !== 0)
+        inCount = br.readVarint();
+    }
+
+    if (inCount === 0)
+      return -1;
+
+    br.seek(36);
+
+    const script = br.readVarBytes();
+
+    return Script.getCoinbaseHeight(script);
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromRaw(data) {
+    const br = new BufferReader(data, true);
+
+    this.readHead(br);
+
+    this._raw = br.data;
+
+    return this;
+  }
+
+  /**
+   * Insantiate a memblock from serialized data.
+   * @param {Buffer} data
+   * @returns {MemBlock}
+   */
+
+  static fromRaw(data) {
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Return serialized block data.
+   * @returns {Buffer}
+   */
+
+  toRaw() {
+    return this._raw;
+  }
+
+  /**
+   * Return serialized block data.
+   * @returns {Buffer}
+   */
+
+  toNormal() {
+    return this._raw;
+  }
+
+  /**
+   * Parse the serialized block data
+   * and create an actual {@link Block}.
+   * @returns {Block}
+   * @throws Parse error
+   */
+
+  toBlock() {
+    const block = Block.fromRaw(this._raw);
+
+    block._hash = this._hash;
+    block._hhash = this._hhash;
+
+    return block;
+  }
+
+  /**
+   * Convert the block to a headers object.
+   * @returns {Headers}
+   */
+
+  toHeaders() {
+    return Headers.fromBlock(this);
+  }
+
+  /**
+   * Test whether an object is a MemBlock.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
+
+  static isMemBlock(obj) {
+    return obj instanceof MemBlock;
+  }
 }
 
-Object.setPrototypeOf(MemBlock.prototype, AbstractBlock.prototype);
-
-/**
- * Test whether the block is a memblock.
- * @returns {Boolean}
- */
-
-MemBlock.prototype.isMemory = function isMemory() {
-  return true;
-};
-
-/**
- * Serialize the block headers.
- * @returns {Buffer}
- */
-
-MemBlock.prototype.toHead = function toHead() {
-  return this._raw.slice(0, 80);
-};
-
-/**
- * Get the full block size.
- * @returns {Number}
- */
-
-MemBlock.prototype.getSize = function getSize() {
-  return this._raw.length;
-};
-
-/**
- * Verify the block.
- * @returns {Boolean}
- */
-
-MemBlock.prototype.verifyBody = function verifyBody() {
-  return true;
-};
-
-/**
- * Retrieve the coinbase height
- * from the coinbase input script.
- * @returns {Number} height (-1 if not present).
- */
-
-MemBlock.prototype.getCoinbaseHeight = function getCoinbaseHeight() {
-  if (this.version < 2)
-    return -1;
-
-  try {
-    return this.parseCoinbaseHeight();
-  } catch (e) {
-    return -1;
-  }
-};
-
-/**
- * Parse the coinbase height
- * from the coinbase input script.
- * @private
- * @returns {Number} height (-1 if not present).
- */
-
-MemBlock.prototype.parseCoinbaseHeight = function parseCoinbaseHeight() {
-  const br = new BufferReader(this._raw, true);
-
-  br.seek(80);
-
-  const txCount = br.readVarint();
-
-  if (txCount === 0)
-    return -1;
-
-  br.seek(4);
-
-  let inCount = br.readVarint();
-
-  if (inCount === 0) {
-    if (br.readU8() !== 0)
-      inCount = br.readVarint();
-  }
-
-  if (inCount === 0)
-    return -1;
-
-  br.seek(36);
-
-  const script = br.readVarBytes();
-
-  return Script.getCoinbaseHeight(script);
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
-
-MemBlock.prototype.fromRaw = function fromRaw(data) {
-  const br = new BufferReader(data, true);
-
-  this.readHead(br);
-
-  this._raw = br.data;
-
-  return this;
-};
-
-/**
- * Insantiate a memblock from serialized data.
- * @param {Buffer} data
- * @returns {MemBlock}
- */
-
-MemBlock.fromRaw = function fromRaw(data) {
-  return new MemBlock().fromRaw(data);
-};
-
-/**
- * Return serialized block data.
- * @returns {Buffer}
- */
-
-MemBlock.prototype.toRaw = function toRaw() {
-  return this._raw;
-};
-
-/**
- * Return serialized block data.
- * @returns {Buffer}
- */
-
-MemBlock.prototype.toNormal = function toNormal() {
-  return this._raw;
-};
-
-/**
- * Parse the serialized block data
- * and create an actual {@link Block}.
- * @returns {Block}
- * @throws Parse error
- */
-
-MemBlock.prototype.toBlock = function toBlock() {
-  const block = Block.fromRaw(this._raw);
-
-  block._hash = this._hash;
-  block._hhash = this._hhash;
-
-  return block;
-};
-
-/**
- * Convert the block to a headers object.
- * @returns {Headers}
- */
-
-MemBlock.prototype.toHeaders = function toHeaders() {
-  return Headers.fromBlock(this);
-};
-
-/**
- * Test whether an object is a MemBlock.
- * @param {Object} obj
- * @returns {Boolean}
- */
-
-MemBlock.isMemBlock = function isMemBlock(obj) {
-  return obj instanceof MemBlock;
-};
-
 /*
  * Expose
  */

lib/primitives/netaddress.js

@@ -15,33 +15,455 @@ const StaticWriter = require('bufio/lib/staticwriter');
 const BufferReader = require('bufio/lib/reader');
 
 /**
+ * Net Address
  * Represents a network address.
  * @alias module:primitives.NetAddress
- * @constructor
- * @param {Object} options
- * @param {Number?} options.time - Timestamp.
- * @param {Number?} options.services - Service bits.
- * @param {String?} options.host - IP address (IPv6 or IPv4).
- * @param {Number?} options.port - Port.
  * @property {Host} host
  * @property {Number} port
  * @property {Number} services
  * @property {Number} time
  */
 
-function NetAddress(options) {
-  if (!(this instanceof NetAddress))
-    return new NetAddress(options);
+class NetAddress {
+  /**
+   * Create a network address.
+   * @constructor
+   * @param {Object} options
+   * @param {Number?} options.time - Timestamp.
+   * @param {Number?} options.services - Service bits.
+   * @param {String?} options.host - IP address (IPv6 or IPv4).
+   * @param {Number?} options.port - Port.
+   */
 
-  this.host = '0.0.0.0';
-  this.port = 0;
-  this.services = 0;
-  this.time = 0;
-  this.hostname = '0.0.0.0:0';
-  this.raw = IP.ZERO_IP;
+  constructor(options) {
+    this.host = '0.0.0.0';
+    this.port = 0;
+    this.services = 0;
+    this.time = 0;
+    this.hostname = '0.0.0.0:0';
+    this.raw = IP.ZERO_IP;
 
-  if (options)
-    this.fromOptions(options);
+    if (options)
+      this.fromOptions(options);
+  }
+
+  /**
+   * Inject properties from options object.
+   * @private
+   * @param {Object} options
+   */
+
+  fromOptions(options) {
+    assert(typeof options.host === 'string');
+    assert(typeof options.port === 'number');
+
+    this.raw = IP.toBuffer(options.host);
+    this.host = IP.toString(this.raw);
+    this.port = options.port;
+
+    if (options.services) {
+      assert(typeof options.services === 'number');
+      this.services = options.services;
+    }
+
+    if (options.time) {
+      assert(typeof options.time === 'number');
+      this.time = options.time;
+    }
+
+    this.hostname = IP.toHostname(this.host, this.port);
+
+    return this;
+  }
+
+  /**
+   * Instantiate network address from options.
+   * @param {Object} options
+   * @returns {NetAddress}
+   */
+
+  static fromOptions(options) {
+    return new this().fromOptions(options);
+  }
+
+  /**
+   * Test whether required services are available.
+   * @param {Number} services
+   * @returns {Boolean}
+   */
+
+  hasServices(services) {
+    return (this.services & services) === services;
+  }
+
+  /**
+   * Test whether the address is IPv4.
+   * @returns {Boolean}
+   */
+
+  static isIPv4() {
+    return IP.isIPv4(this.raw);
+  }
+
+  /**
+   * Test whether the address is IPv6.
+   * @returns {Boolean}
+   */
+
+  static isIPv6() {
+    return IP.isIPv6(this.raw);
+  }
+
+  /**
+   * Test whether the host is null.
+   * @returns {Boolean}
+   */
+
+  isNull() {
+    return IP.isNull(this.raw);
+  }
+
+  /**
+   * Test whether the host is a local address.
+   * @returns {Boolean}
+   */
+
+  isLocal() {
+    return IP.isLocal(this.raw);
+  }
+
+  /**
+   * Test whether the host is valid.
+   * @returns {Boolean}
+   */
+
+  isValid() {
+    return IP.isValid(this.raw);
+  }
+
+  /**
+   * Test whether the host is routable.
+   * @returns {Boolean}
+   */
+
+  isRoutable() {
+    return IP.isRoutable(this.raw);
+  }
+
+  /**
+   * Test whether the host is an onion address.
+   * @returns {Boolean}
+   */
+
+  isOnion() {
+    return IP.isOnion(this.raw);
+  }
+
+  /**
+   * Compare against another network address.
+   * @returns {Boolean}
+   */
+
+  equal(addr) {
+    return this.compare(addr) === 0;
+  }
+
+  /**
+   * Compare against another network address.
+   * @returns {Number}
+   */
+
+  compare(addr) {
+    const cmp = this.raw.compare(addr.raw);
+
+    if (cmp !== 0)
+      return cmp;
+
+    return this.port - addr.port;
+  }
+
+  /**
+   * Get reachable score to destination.
+   * @param {NetAddress} dest
+   * @returns {Number}
+   */
+
+  getReachability(dest) {
+    return IP.getReachability(this.raw, dest.raw);
+  }
+
+  /**
+   * Set null host.
+   */
+
+  setNull() {
+    this.raw = IP.ZERO_IP;
+    this.host = '0.0.0.0';
+    this.hostname = IP.toHostname(this.host, this.port);
+  }
+
+  /**
+   * Set host.
+   * @param {String} host
+   */
+
+  setHost(host) {
+    this.raw = IP.toBuffer(host);
+    this.host = IP.toString(this.raw);
+    this.hostname = IP.toHostname(this.host, this.port);
+  }
+
+  /**
+   * Set port.
+   * @param {Number} port
+   */
+
+  setPort(port) {
+    assert(port >= 0 && port <= 0xffff);
+    this.port = port;
+    this.hostname = IP.toHostname(this.host, port);
+  }
+
+  /**
+   * Inject properties from host, port, and network.
+   * @private
+   * @param {String} host
+   * @param {Number} port
+   * @param {(Network|NetworkType)?} network
+   */
+
+  fromHost(host, port, network) {
+    network = Network.get(network);
+
+    assert(port >= 0 && port <= 0xffff);
+
+    this.raw = IP.toBuffer(host);
+    this.host = IP.toString(this.raw);
+    this.port = port;
+    this.services = NetAddress.DEFAULT_SERVICES;
+    this.time = network.now();
+
+    this.hostname = IP.toHostname(this.host, this.port);
+
+    return this;
+  }
+
+  /**
+   * Instantiate a network address
+   * from a host and port.
+   * @param {String} host
+   * @param {Number} port
+   * @param {(Network|NetworkType)?} network
+   * @returns {NetAddress}
+   */
+
+  static fromHost(host, port, network) {
+    return new this().fromHost(host, port, network);
+  }
+
+  /**
+   * Inject properties from hostname and network.
+   * @private
+   * @param {String} hostname
+   * @param {(Network|NetworkType)?} network
+   */
+
+  fromHostname(hostname, network) {
+    network = Network.get(network);
+
+    const addr = IP.fromHostname(hostname, network.port);
+
+    return this.fromHost(addr.host, addr.port, network);
+  }
+
+  /**
+   * Instantiate a network address
+   * from a hostname (i.e. 127.0.0.1:8333).
+   * @param {String} hostname
+   * @param {(Network|NetworkType)?} network
+   * @returns {NetAddress}
+   */
+
+  static fromHostname(hostname, network) {
+    return new this().fromHostname(hostname, network);
+  }
+
+  /**
+   * Inject properties from socket.
+   * @private
+   * @param {net.Socket} socket
+   */
+
+  fromSocket(socket, network) {
+    const host = socket.remoteAddress;
+    const port = socket.remotePort;
+    assert(typeof host === 'string');
+    assert(typeof port === 'number');
+    return this.fromHost(IP.normalize(host), port, network);
+  }
+
+  /**
+   * Instantiate a network address
+   * from a socket.
+   * @param {net.Socket} socket
+   * @returns {NetAddress}
+   */
+
+  static fromSocket(hostname, network) {
+    return new this().fromSocket(hostname, network);
+  }
+
+  /**
+   * Inject properties from buffer reader.
+   * @private
+   * @param {BufferReader} br
+   * @param {Boolean?} full - Include timestamp.
+   */
+
+  fromReader(br, full) {
+    this.time = full ? br.readU32() : 0;
+    this.services = br.readU32();
+
+    // Note: hi service bits
+    // are currently unused.
+    br.readU32();
+
+    this.raw = br.readBytes(16);
+    this.host = IP.toString(this.raw);
+    this.port = br.readU16BE();
+    this.hostname = IP.toHostname(this.host, this.port);
+
+    return this;
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   * @param {Boolean?} full - Include timestamp.
+   */
+
+  fromRaw(data, full) {
+    return this.fromReader(new BufferReader(data), full);
+  }
+
+  /**
+   * Insantiate a network address from buffer reader.
+   * @param {BufferReader} br
+   * @param {Boolean?} full - Include timestamp.
+   * @returns {NetAddress}
+   */
+
+  static fromReader(br, full) {
+    return new this().fromReader(br, full);
+  }
+
+  /**
+   * Insantiate a network address from serialized data.
+   * @param {Buffer} data
+   * @param {Boolean?} full - Include timestamp.
+   * @returns {NetAddress}
+   */
+
+  static fromRaw(data, full) {
+    return new this().fromRaw(data, full);
+  }
+
+  /**
+   * Write network address to a buffer writer.
+   * @param {BufferWriter} bw
+   * @param {Boolean?} full - Include timestamp.
+   * @returns {Buffer}
+   */
+
+  toWriter(bw, full) {
+    if (full)
+      bw.writeU32(this.time);
+
+    bw.writeU32(this.services);
+    bw.writeU32(0);
+    bw.writeBytes(this.raw);
+    bw.writeU16BE(this.port);
+
+    return bw;
+  }
+
+  /**
+   * Calculate serialization size of address.
+   * @returns {Number}
+   */
+
+  getSize(full) {
+    return 26 + (full ? 4 : 0);
+  }
+
+  /**
+   * Serialize network address.
+   * @param {Boolean?} full - Include timestamp.
+   * @returns {Buffer}
+   */
+
+  toRaw(full) {
+    const size = this.getSize(full);
+    return this.toWriter(new StaticWriter(size), full).render();
+  }
+
+  /**
+   * Convert net address to json-friendly object.
+   * @returns {Object}
+   */
+
+  toJSON() {
+    return {
+      host: this.host,
+      port: this.port,
+      services: this.services,
+      time: this.time
+    };
+  }
+
+  /**
+   * Inject properties from json object.
+   * @private
+   * @param {Object} json
+   * @returns {NetAddress}
+   */
+
+  fromJSON(json) {
+    assert((json.port & 0xffff) === json.port);
+    assert((json.services >>> 0) === json.services);
+    assert((json.time >>> 0) === json.time);
+    this.raw = IP.toBuffer(json.host);
+    this.host = json.host;
+    this.port = json.port;
+    this.services = json.services;
+    this.time = json.time;
+    this.hostname = IP.toHostname(this.host, this.port);
+    return this;
+  }
+
+  /**
+   * Instantiate net address from json object.
+   * @param {Object} json
+   * @returns {NetAddress}
+   */
+
+  static fromJSON(json) {
+    return new this().fromJSON(json);
+  }
+
+  /**
+   * Inspect the network address.
+   * @returns {Object}
+   */
+
+  inspect() {
+    return '<NetAddress:'
+      + ` hostname=${this.hostname}`
+      + ` services=${this.services.toString(2)}`
+      + ` date=${util.date(this.time)}`
+      + '>';
+  }
 }
 
 /**
@@ -56,424 +478,6 @@ NetAddress.DEFAULT_SERVICES = 0
   | common.services.WITNESS
   | common.services.BLOOM;
 
-/**
- * Inject properties from options object.
- * @private
- * @param {Object} options
- */
-
-NetAddress.prototype.fromOptions = function fromOptions(options) {
-  assert(typeof options.host === 'string');
-  assert(typeof options.port === 'number');
-
-  this.raw = IP.toBuffer(options.host);
-  this.host = IP.toString(this.raw);
-  this.port = options.port;
-
-  if (options.services) {
-    assert(typeof options.services === 'number');
-    this.services = options.services;
-  }
-
-  if (options.time) {
-    assert(typeof options.time === 'number');
-    this.time = options.time;
-  }
-
-  this.hostname = IP.toHostname(this.host, this.port);
-
-  return this;
-};
-
-/**
- * Instantiate network address from options.
- * @param {Object} options
- * @returns {NetAddress}
- */
-
-NetAddress.fromOptions = function fromOptions(options) {
-  return new NetAddress().fromOptions(options);
-};
-
-/**
- * Test whether required services are available.
- * @param {Number} services
- * @returns {Boolean}
- */
-
-NetAddress.prototype.hasServices = function hasServices(services) {
-  return (this.services & services) === services;
-};
-
-/**
- * Test whether the address is IPv4.
- * @returns {Boolean}
- */
-
-NetAddress.isIPv4 = function isIPv4() {
-  return IP.isIPv4(this.raw);
-};
-
-/**
- * Test whether the address is IPv6.
- * @returns {Boolean}
- */
-
-NetAddress.isIPv6 = function isIPv6() {
-  return IP.isIPv6(this.raw);
-};
-
-/**
- * Test whether the host is null.
- * @returns {Boolean}
- */
-
-NetAddress.prototype.isNull = function isNull() {
-  return IP.isNull(this.raw);
-};
-
-/**
- * Test whether the host is a local address.
- * @returns {Boolean}
- */
-
-NetAddress.prototype.isLocal = function isLocal() {
-  return IP.isLocal(this.raw);
-};
-
-/**
- * Test whether the host is valid.
- * @returns {Boolean}
- */
-
-NetAddress.prototype.isValid = function isValid() {
-  return IP.isValid(this.raw);
-};
-
-/**
- * Test whether the host is routable.
- * @returns {Boolean}
- */
-
-NetAddress.prototype.isRoutable = function isRoutable() {
-  return IP.isRoutable(this.raw);
-};
-
-/**
- * Test whether the host is an onion address.
- * @returns {Boolean}
- */
-
-NetAddress.prototype.isOnion = function isOnion() {
-  return IP.isOnion(this.raw);
-};
-
-/**
- * Compare against another network address.
- * @returns {Boolean}
- */
-
-NetAddress.prototype.equal = function equal(addr) {
-  return this.compare(addr) === 0;
-};
-
-/**
- * Compare against another network address.
- * @returns {Number}
- */
-
-NetAddress.prototype.compare = function compare(addr) {
-  const cmp = this.raw.compare(addr.raw);
-
-  if (cmp !== 0)
-    return cmp;
-
-  return this.port - addr.port;
-};
-
-/**
- * Get reachable score to destination.
- * @param {NetAddress} dest
- * @returns {Number}
- */
-
-NetAddress.prototype.getReachability = function getReachability(dest) {
-  return IP.getReachability(this.raw, dest.raw);
-};
-
-/**
- * Set null host.
- */
-
-NetAddress.prototype.setNull = function setNull() {
-  this.raw = IP.ZERO_IP;
-  this.host = '0.0.0.0';
-  this.hostname = IP.toHostname(this.host, this.port);
-};
-
-/**
- * Set host.
- * @param {String} host
- */
-
-NetAddress.prototype.setHost = function setHost(host) {
-  this.raw = IP.toBuffer(host);
-  this.host = IP.toString(this.raw);
-  this.hostname = IP.toHostname(this.host, this.port);
-};
-
-/**
- * Set port.
- * @param {Number} port
- */
-
-NetAddress.prototype.setPort = function setPort(port) {
-  assert(port >= 0 && port <= 0xffff);
-  this.port = port;
-  this.hostname = IP.toHostname(this.host, port);
-};
-
-/**
- * Inject properties from host, port, and network.
- * @private
- * @param {String} host
- * @param {Number} port
- * @param {(Network|NetworkType)?} network
- */
-
-NetAddress.prototype.fromHost = function fromHost(host, port, network) {
-  network = Network.get(network);
-
-  assert(port >= 0 && port <= 0xffff);
-
-  this.raw = IP.toBuffer(host);
-  this.host = IP.toString(this.raw);
-  this.port = port;
-  this.services = NetAddress.DEFAULT_SERVICES;
-  this.time = network.now();
-
-  this.hostname = IP.toHostname(this.host, this.port);
-
-  return this;
-};
-
-/**
- * Instantiate a network address
- * from a host and port.
- * @param {String} host
- * @param {Number} port
- * @param {(Network|NetworkType)?} network
- * @returns {NetAddress}
- */
-
-NetAddress.fromHost = function fromHost(host, port, network) {
-  return new NetAddress().fromHost(host, port, network);
-};
-
-/**
- * Inject properties from hostname and network.
- * @private
- * @param {String} hostname
- * @param {(Network|NetworkType)?} network
- */
-
-NetAddress.prototype.fromHostname = function fromHostname(hostname, network) {
-  network = Network.get(network);
-
-  const addr = IP.fromHostname(hostname, network.port);
-
-  return this.fromHost(addr.host, addr.port, network);
-};
-
-/**
- * Instantiate a network address
- * from a hostname (i.e. 127.0.0.1:8333).
- * @param {String} hostname
- * @param {(Network|NetworkType)?} network
- * @returns {NetAddress}
- */
-
-NetAddress.fromHostname = function fromHostname(hostname, network) {
-  return new NetAddress().fromHostname(hostname, network);
-};
-
-/**
- * Inject properties from socket.
- * @private
- * @param {net.Socket} socket
- */
-
-NetAddress.prototype.fromSocket = function fromSocket(socket, network) {
-  const host = socket.remoteAddress;
-  const port = socket.remotePort;
-  assert(typeof host === 'string');
-  assert(typeof port === 'number');
-  return this.fromHost(IP.normalize(host), port, network);
-};
-
-/**
- * Instantiate a network address
- * from a socket.
- * @param {net.Socket} socket
- * @returns {NetAddress}
- */
-
-NetAddress.fromSocket = function fromSocket(hostname, network) {
-  return new NetAddress().fromSocket(hostname, network);
-};
-
-/**
- * Inject properties from buffer reader.
- * @private
- * @param {BufferReader} br
- * @param {Boolean?} full - Include timestamp.
- */
-
-NetAddress.prototype.fromReader = function fromReader(br, full) {
-  this.time = full ? br.readU32() : 0;
-  this.services = br.readU32();
-
-  // Note: hi service bits
-  // are currently unused.
-  br.readU32();
-
-  this.raw = br.readBytes(16);
-  this.host = IP.toString(this.raw);
-  this.port = br.readU16BE();
-  this.hostname = IP.toHostname(this.host, this.port);
-
-  return this;
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- * @param {Boolean?} full - Include timestamp.
- */
-
-NetAddress.prototype.fromRaw = function fromRaw(data, full) {
-  return this.fromReader(new BufferReader(data), full);
-};
-
-/**
- * Insantiate a network address from buffer reader.
- * @param {BufferReader} br
- * @param {Boolean?} full - Include timestamp.
- * @returns {NetAddress}
- */
-
-NetAddress.fromReader = function fromReader(br, full) {
-  return new NetAddress().fromReader(br, full);
-};
-
-/**
- * Insantiate a network address from serialized data.
- * @param {Buffer} data
- * @param {Boolean?} full - Include timestamp.
- * @returns {NetAddress}
- */
-
-NetAddress.fromRaw = function fromRaw(data, full) {
-  return new NetAddress().fromRaw(data, full);
-};
-
-/**
- * Write network address to a buffer writer.
- * @param {BufferWriter} bw
- * @param {Boolean?} full - Include timestamp.
- * @returns {Buffer}
- */
-
-NetAddress.prototype.toWriter = function toWriter(bw, full) {
-  if (full)
-    bw.writeU32(this.time);
-
-  bw.writeU32(this.services);
-  bw.writeU32(0);
-  bw.writeBytes(this.raw);
-  bw.writeU16BE(this.port);
-
-  return bw;
-};
-
-/**
- * Calculate serialization size of address.
- * @returns {Number}
- */
-
-NetAddress.prototype.getSize = function getSize(full) {
-  return 26 + (full ? 4 : 0);
-};
-
-/**
- * Serialize network address.
- * @param {Boolean?} full - Include timestamp.
- * @returns {Buffer}
- */
-
-NetAddress.prototype.toRaw = function toRaw(full) {
-  const size = this.getSize(full);
-  return this.toWriter(new StaticWriter(size), full).render();
-};
-
-/**
- * Convert net address to json-friendly object.
- * @returns {Object}
- */
-
-NetAddress.prototype.toJSON = function toJSON() {
-  return {
-    host: this.host,
-    port: this.port,
-    services: this.services,
-    time: this.time
-  };
-};
-
-/**
- * Inject properties from json object.
- * @private
- * @param {Object} json
- * @returns {NetAddress}
- */
-
-NetAddress.prototype.fromJSON = function fromJSON(json) {
-  assert((json.port & 0xffff) === json.port);
-  assert((json.services >>> 0) === json.services);
-  assert((json.time >>> 0) === json.time);
-  this.raw = IP.toBuffer(json.host);
-  this.host = json.host;
-  this.port = json.port;
-  this.services = json.services;
-  this.time = json.time;
-  this.hostname = IP.toHostname(this.host, this.port);
-  return this;
-};
-
-/**
- * Instantiate net address from json object.
- * @param {Object} json
- * @returns {NetAddress}
- */
-
-NetAddress.fromJSON = function fromJSON(json) {
-  return new NetAddress().fromJSON(json);
-};
-
-/**
- * Inspect the network address.
- * @returns {Object}
- */
-
-NetAddress.prototype.inspect = function inspect() {
-  return '<NetAddress:'
-    + ` hostname=${this.hostname}`
-    + ` services=${this.services.toString(2)}`
-    + ` date=${util.date(this.time)}`
-    + '>';
-};
-
 /*
  * Expose
  */

lib/primitives/outpoint.js

@@ -12,330 +12,334 @@ const BufferReader = require('bufio/lib/reader');
 const encoding = require('bufio/lib/encoding');
 
 /**
+ * Outpoint
  * Represents a COutPoint.
  * @alias module:primitives.Outpoint
- * @constructor
- * @param {Hash?} hash
- * @param {Number?} index
  * @property {Hash} hash
  * @property {Number} index
  */
 
-function Outpoint(hash, index) {
-  if (!(this instanceof Outpoint))
-    return new Outpoint(hash, index);
+class Outpoint {
+  /**
+   * Create an outpoint.
+   * @constructor
+   * @param {Hash?} hash
+   * @param {Number?} index
+   */
 
-  this.hash = encoding.NULL_HASH;
-  this.index = 0xffffffff;
+  constructor(hash, index) {
+    this.hash = encoding.NULL_HASH;
+    this.index = 0xffffffff;
 
-  if (hash != null) {
-    assert(typeof hash === 'string', 'Hash must be a string.');
-    assert((index >>> 0) === index, 'Index must be a uint32.');
-    this.hash = hash;
+    if (hash != null) {
+      assert(typeof hash === 'string', 'Hash must be a string.');
+      assert((index >>> 0) === index, 'Index must be a uint32.');
+      this.hash = hash;
+      this.index = index;
+    }
+  }
+
+  /**
+   * Inject properties from options object.
+   * @private
+   * @param {Object} options
+   */
+
+  fromOptions(options) {
+    assert(options, 'Outpoint data is required.');
+    assert(typeof options.hash === 'string', 'Hash must be a string.');
+    assert((options.index >>> 0) === options.index, 'Index must be a uint32.');
+    this.hash = options.hash;
+    this.index = options.index;
+    return this;
+  }
+
+  /**
+   * Instantate outpoint from options object.
+   * @param {Object} options
+   * @returns {Outpoint}
+   */
+
+  static fromOptions(options) {
+    return new this().fromOptions(options);
+  }
+
+  /**
+   * Clone the outpoint.
+   * @returns {Outpoint}
+   */
+
+  clone() {
+    const outpoint = new this.constructor();
+    outpoint.hash = this.value;
+    outpoint.index = this.index;
+    return outpoint;
+  }
+
+  /**
+   * Test equality against another outpoint.
+   * @param {Outpoint} prevout
+   * @returns {Boolean}
+   */
+
+  equals(prevout) {
+    assert(Outpoint.isOutpoint(prevout));
+    return this.hash === prevout.hash
+      && this.index === prevout.index;
+  }
+
+  /**
+   * Compare against another outpoint (BIP69).
+   * @param {Outpoint} prevout
+   * @returns {Number}
+   */
+
+  compare(prevout) {
+    assert(Outpoint.isOutpoint(prevout));
+
+    const cmp = strcmp(this.txid(), prevout.txid());
+
+    if (cmp !== 0)
+      return cmp;
+
+    return this.index - prevout.index;
+  }
+
+  /**
+   * Test whether the outpoint is null (hash of zeroes
+   * with max-u32 index). Used to detect coinbases.
+   * @returns {Boolean}
+   */
+
+  isNull() {
+    return this.index === 0xffffffff && this.hash === encoding.NULL_HASH;
+  }
+
+  /**
+   * Get little-endian hash.
+   * @returns {Hash}
+   */
+
+  rhash() {
+    return encoding.revHex(this.hash);
+  }
+
+  /**
+   * Get little-endian hash.
+   * @returns {Hash}
+   */
+
+  txid() {
+    return this.rhash();
+  }
+
+  /**
+   * Serialize outpoint to a key
+   * suitable for a hash table.
+   * @returns {String}
+   */
+
+  toKey() {
+    return Outpoint.toKey(this.hash, this.index);
+  }
+
+  /**
+   * Inject properties from hash table key.
+   * @private
+   * @param {String} key
+   * @returns {Outpoint}
+   */
+
+  fromKey(key) {
+    assert(key.length > 64);
+    this.hash = key.slice(0, 64);
+    this.index = parseInt(key.slice(64), 10);
+    return this;
+  }
+
+  /**
+   * Instantiate outpoint from hash table key.
+   * @param {String} key
+   * @returns {Outpoint}
+   */
+
+  static fromKey(key) {
+    return new this().fromKey(key);
+  }
+
+  /**
+   * Write outpoint to a buffer writer.
+   * @param {BufferWriter} bw
+   */
+
+  toWriter(bw) {
+    bw.writeHash(this.hash);
+    bw.writeU32(this.index);
+    return bw;
+  }
+
+  /**
+   * Calculate size of outpoint.
+   * @returns {Number}
+   */
+
+  getSize() {
+    return 36;
+  }
+
+  /**
+   * Serialize outpoint.
+   * @returns {Buffer}
+   */
+
+  toRaw() {
+    return this.toWriter(new StaticWriter(36)).render();
+  }
+
+  /**
+   * Inject properties from buffer reader.
+   * @private
+   * @param {BufferReader} br
+   */
+
+  fromReader(br) {
+    this.hash = br.readHash('hex');
+    this.index = br.readU32();
+    return this;
+  }
+
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromRaw(data) {
+    return this.fromReader(new BufferReader(data));
+  }
+
+  /**
+   * Instantiate outpoint from a buffer reader.
+   * @param {BufferReader} br
+   * @returns {Outpoint}
+   */
+
+  static fromReader(br) {
+    return new this().fromReader(br);
+  }
+
+  /**
+   * Instantiate outpoint from serialized data.
+   * @param {Buffer} data
+   * @returns {Outpoint}
+   */
+
+  static fromRaw(data) {
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Inject properties from json object.
+   * @private
+   * @params {Object} json
+   */
+
+  fromJSON(json) {
+    assert(json, 'Outpoint data is required.');
+    assert(typeof json.hash === 'string', 'Hash must be a string.');
+    assert((json.index >>> 0) === json.index, 'Index must be a uint32.');
+    this.hash = encoding.revHex(json.hash);
+    this.index = json.index;
+    return this;
+  }
+
+  /**
+   * Convert the outpoint to an object suitable
+   * for JSON serialization. Note that the hash
+   * will be reversed to abide by bitcoind's legacy
+   * of little-endian uint256s.
+   * @returns {Object}
+   */
+
+  toJSON() {
+    return {
+      hash: encoding.revHex(this.hash),
+      index: this.index
+    };
+  }
+
+  /**
+   * Instantiate outpoint from json object.
+   * @param {Object} json
+   * @returns {Outpoint}
+   */
+
+  static fromJSON(json) {
+    return new this().fromJSON(json);
+  }
+
+  /**
+   * Inject properties from tx.
+   * @private
+   * @param {TX} tx
+   * @param {Number} index
+   */
+
+  fromTX(tx, index) {
+    assert(tx);
+    assert(typeof index === 'number');
+    assert(index >= 0);
+    this.hash = tx.hash('hex');
     this.index = index;
+    return this;
+  }
+
+  /**
+   * Instantiate outpoint from tx.
+   * @param {TX} tx
+   * @param {Number} index
+   * @returns {Outpoint}
+   */
+
+  static fromTX(tx, index) {
+    return new this().fromTX(tx, index);
+  }
+
+  /**
+   * Serialize outpoint to a key
+   * suitable for a hash table.
+   * @param {Hash} hash
+   * @param {Number} index
+   * @returns {String}
+   */
+
+  static toKey(hash, index) {
+    assert(typeof hash === 'string');
+    assert(hash.length === 64);
+    assert(index >= 0);
+    return hash + index;
+  }
+
+  /**
+   * Convert the outpoint to a user-friendly string.
+   * @returns {String}
+   */
+
+  inspect() {
+    return `<Outpoint: ${this.rhash()}/${this.index}>`;
+  }
+
+  /**
+   * Test an object to see if it is an outpoint.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
+
+  static isOutpoint(obj) {
+    return obj instanceof Outpoint;
   }
 }
 
-/**
- * Inject properties from options object.
- * @private
- * @param {Object} options
- */
-
-Outpoint.prototype.fromOptions = function fromOptions(options) {
-  assert(options, 'Outpoint data is required.');
-  assert(typeof options.hash === 'string', 'Hash must be a string.');
-  assert((options.index >>> 0) === options.index, 'Index must be a uint32.');
-  this.hash = options.hash;
-  this.index = options.index;
-  return this;
-};
-
-/**
- * Instantate outpoint from options object.
- * @param {Object} options
- * @returns {Outpoint}
- */
-
-Outpoint.fromOptions = function fromOptions(options) {
-  return new Outpoint().fromOptions(options);
-};
-
-/**
- * Clone the outpoint.
- * @returns {Outpoint}
- */
-
-Outpoint.prototype.clone = function clone() {
-  const outpoint = new Outpoint();
-  outpoint.hash = this.value;
-  outpoint.index = this.index;
-  return outpoint;
-};
-
-/**
- * Test equality against another outpoint.
- * @param {Outpoint} prevout
- * @returns {Boolean}
- */
-
-Outpoint.prototype.equals = function equals(prevout) {
-  assert(Outpoint.isOutpoint(prevout));
-  return this.hash === prevout.hash
-    && this.index === prevout.index;
-};
-
-/**
- * Compare against another outpoint (BIP69).
- * @param {Outpoint} prevout
- * @returns {Number}
- */
-
-Outpoint.prototype.compare = function compare(prevout) {
-  assert(Outpoint.isOutpoint(prevout));
-
-  const cmp = strcmp(this.txid(), prevout.txid());
-
-  if (cmp !== 0)
-    return cmp;
-
-  return this.index - prevout.index;
-};
-
-/**
- * Test whether the outpoint is null (hash of zeroes
- * with max-u32 index). Used to detect coinbases.
- * @returns {Boolean}
- */
-
-Outpoint.prototype.isNull = function isNull() {
-  return this.index === 0xffffffff && this.hash === encoding.NULL_HASH;
-};
-
-/**
- * Get little-endian hash.
- * @returns {Hash}
- */
-
-Outpoint.prototype.rhash = function rhash() {
-  return encoding.revHex(this.hash);
-};
-
-/**
- * Get little-endian hash.
- * @returns {Hash}
- */
-
-Outpoint.prototype.txid = function txid() {
-  return this.rhash();
-};
-
-/**
- * Serialize outpoint to a key
- * suitable for a hash table.
- * @returns {String}
- */
-
-Outpoint.prototype.toKey = function toKey() {
-  return Outpoint.toKey(this.hash, this.index);
-};
-
-/**
- * Inject properties from hash table key.
- * @private
- * @param {String} key
- * @returns {Outpoint}
- */
-
-Outpoint.prototype.fromKey = function fromKey(key) {
-  assert(key.length > 64);
-  this.hash = key.slice(0, 64);
-  this.index = parseInt(key.slice(64), 10);
-  return this;
-};
-
-/**
- * Instantiate outpoint from hash table key.
- * @param {String} key
- * @returns {Outpoint}
- */
-
-Outpoint.fromKey = function fromKey(key) {
-  return new Outpoint().fromKey(key);
-};
-
-/**
- * Write outpoint to a buffer writer.
- * @param {BufferWriter} bw
- */
-
-Outpoint.prototype.toWriter = function toWriter(bw) {
-  bw.writeHash(this.hash);
-  bw.writeU32(this.index);
-  return bw;
-};
-
-/**
- * Calculate size of outpoint.
- * @returns {Number}
- */
-
-Outpoint.prototype.getSize = function getSize() {
-  return 36;
-};
-
-/**
- * Serialize outpoint.
- * @returns {Buffer}
- */
-
-Outpoint.prototype.toRaw = function toRaw() {
-  return this.toWriter(new StaticWriter(36)).render();
-};
-
-/**
- * Inject properties from buffer reader.
- * @private
- * @param {BufferReader} br
- */
-
-Outpoint.prototype.fromReader = function fromReader(br) {
-  this.hash = br.readHash('hex');
-  this.index = br.readU32();
-  return this;
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
-
-Outpoint.prototype.fromRaw = function fromRaw(data) {
-  return this.fromReader(new BufferReader(data));
-};
-
-/**
- * Instantiate outpoint from a buffer reader.
- * @param {BufferReader} br
- * @returns {Outpoint}
- */
-
-Outpoint.fromReader = function fromReader(br) {
-  return new Outpoint().fromReader(br);
-};
-
-/**
- * Instantiate outpoint from serialized data.
- * @param {Buffer} data
- * @returns {Outpoint}
- */
-
-Outpoint.fromRaw = function fromRaw(data) {
-  return new Outpoint().fromRaw(data);
-};
-
-/**
- * Inject properties from json object.
- * @private
- * @params {Object} json
- */
-
-Outpoint.prototype.fromJSON = function fromJSON(json) {
-  assert(json, 'Outpoint data is required.');
-  assert(typeof json.hash === 'string', 'Hash must be a string.');
-  assert((json.index >>> 0) === json.index, 'Index must be a uint32.');
-  this.hash = encoding.revHex(json.hash);
-  this.index = json.index;
-  return this;
-};
-
-/**
- * Convert the outpoint to an object suitable
- * for JSON serialization. Note that the hash
- * will be reversed to abide by bitcoind's legacy
- * of little-endian uint256s.
- * @returns {Object}
- */
-
-Outpoint.prototype.toJSON = function toJSON() {
-  return {
-    hash: encoding.revHex(this.hash),
-    index: this.index
-  };
-};
-
-/**
- * Instantiate outpoint from json object.
- * @param {Object} json
- * @returns {Outpoint}
- */
-
-Outpoint.fromJSON = function fromJSON(json) {
-  return new Outpoint().fromJSON(json);
-};
-
-/**
- * Inject properties from tx.
- * @private
- * @param {TX} tx
- * @param {Number} index
- */
-
-Outpoint.prototype.fromTX = function fromTX(tx, index) {
-  assert(tx);
-  assert(typeof index === 'number');
-  assert(index >= 0);
-  this.hash = tx.hash('hex');
-  this.index = index;
-  return this;
-};
-
-/**
- * Instantiate outpoint from tx.
- * @param {TX} tx
- * @param {Number} index
- * @returns {Outpoint}
- */
-
-Outpoint.fromTX = function fromTX(tx, index) {
-  return new Outpoint().fromTX(tx, index);
-};
-
-/**
- * Serialize outpoint to a key
- * suitable for a hash table.
- * @param {Hash} hash
- * @param {Number} index
- * @returns {String}
- */
-
-Outpoint.toKey = function toKey(hash, index) {
-  assert(typeof hash === 'string');
-  assert(hash.length === 64);
-  assert(index >= 0);
-  return hash + index;
-};
-
-/**
- * Convert the outpoint to a user-friendly string.
- * @returns {String}
- */
-
-Outpoint.prototype.inspect = function inspect() {
-  return `<Outpoint: ${this.rhash()}/${this.index}>`;
-};
-
-/**
- * Test an object to see if it is an outpoint.
- * @param {Object} obj
- * @returns {Boolean}
- */
-
-Outpoint.isOutpoint = function isOutpoint(obj) {
-  return obj instanceof Outpoint;
-};
-
 /*
  * Helpers
  */

lib/primitives/output.js

@@ -20,357 +20,360 @@ const policy = require('../protocol/policy');
 /**
  * Represents a transaction output.
  * @alias module:primitives.Output
- * @constructor
- * @param {NakedOutput} options
- * @property {Amount} value - Value in satoshis.
+ * @property {Amount} value
  * @property {Script} script
  */
 
-function Output(options) {
-  if (!(this instanceof Output))
-    return new Output(options);
+class Output {
+  /**
+   * Create an output.
+   * @constructor
+   * @param {Object?} options
+   */
 
-  this.value = 0;
-  this.script = new Script();
+  constructor(options) {
+    this.value = 0;
+    this.script = new Script();
 
-  if (options)
-    this.fromOptions(options);
-}
+    if (options)
+      this.fromOptions(options);
+  }
 
-/**
- * Inject properties from options object.
- * @private
- * @param {NakedOutput} options
- */
+  /**
+   * Inject properties from options object.
+   * @private
+   * @param {NakedOutput} options
+   */
 
-Output.prototype.fromOptions = function fromOptions(options) {
-  assert(options, 'Output data is required.');
+  fromOptions(options) {
+    assert(options, 'Output data is required.');
 
-  if (options.value) {
-    assert(Number.isSafeInteger(options.value) && options.value >= 0,
+    if (options.value) {
+      assert(Number.isSafeInteger(options.value) && options.value >= 0,
+        'Value must be a uint64.');
+      this.value = options.value;
+    }
+
+    if (options.script)
+      this.script.fromOptions(options.script);
+
+    if (options.address)
+      this.script.fromAddress(options.address);
+
+    return this;
+  }
+
+  /**
+   * Instantiate output from options object.
+   * @param {NakedOutput} options
+   * @returns {Output}
+   */
+
+  static fromOptions(options) {
+    return new this().fromOptions(options);
+  }
+
+  /**
+   * Inject properties from script/value pair.
+   * @private
+   * @param {Script|Address} script
+   * @param {Amount} value
+   * @returns {Output}
+   */
+
+  fromScript(script, value) {
+    if (typeof script === 'string')
+      script = Address.fromString(script);
+
+    if (script instanceof Address)
+      script = Script.fromAddress(script);
+
+    assert(script instanceof Script, 'Script must be a Script.');
+    assert(Number.isSafeInteger(value) && value >= 0, 'Value must be a uint64.');
+
+    this.script = script;
+    this.value = value;
+
+    return this;
+  }
+
+  /**
+   * Instantiate output from script/value pair.
+   * @param {Script|Address} script
+   * @param {Amount} value
+   * @returns {Output}
+   */
+
+  static fromScript(script, value) {
+    return new this().fromScript(script, value);
+  }
+
+  /**
+   * Clone the output.
+   * @returns {Output}
+   */
+
+  clone() {
+    const output = new this.constructor();
+    output.value = this.value;
+    output.script.inject(this.script);
+    return output;
+  }
+
+  /**
+   * Test equality against another output.
+   * @param {Output} output
+   * @returns {Boolean}
+   */
+
+  equals(output) {
+    assert(Output.isOutput(output));
+    return this.value === output.value
+      && this.script.equals(output.script);
+  }
+
+  /**
+   * Compare against another output (BIP69).
+   * @param {Output} output
+   * @returns {Number}
+   */
+
+  compare(output) {
+    assert(Output.isOutput(output));
+
+    const cmp = this.value - output.value;
+
+    if (cmp !== 0)
+      return cmp;
+
+    return this.script.compare(output.script);
+  }
+
+  /**
+   * Get the script type as a string.
+   * @returns {ScriptType} type
+   */
+
+  getType() {
+    return Script.typesByVal[this.script.getType()].toLowerCase();
+  }
+
+  /**
+   * Get the address.
+   * @returns {Address} address
+   */
+
+  getAddress() {
+    return this.script.getAddress();
+  }
+
+  /**
+   * Get the address hash.
+   * @param {String?} enc
+   * @returns {Hash} hash
+   */
+
+  getHash(enc) {
+    const addr = this.getAddress();
+
+    if (!addr)
+      return null;
+
+    return addr.getHash(enc);
+  }
+
+  /**
+   * Convert the input to a more user-friendly object.
+   * @returns {Object}
+   */
+
+  inspect() {
+    return {
+      type: this.getType(),
+      value: Amount.btc(this.value),
+      script: this.script,
+      address: this.getAddress()
+    };
+  }
+
+  /**
+   * Convert the output to an object suitable
+   * for JSON serialization.
+   * @returns {Object}
+   */
+
+  toJSON() {
+    return this.getJSON();
+  }
+
+  /**
+   * Convert the output to an object suitable
+   * for JSON serialization.
+   * @param {Network} network
+   * @returns {Object}
+   */
+
+  getJSON(network) {
+    let addr = this.getAddress();
+
+    network = Network.get(network);
+
+    if (addr)
+      addr = addr.toString(network);
+
+    return {
+      value: this.value,
+      script: this.script.toJSON(),
+      address: addr
+    };
+  }
+
+  /**
+   * Calculate the dust threshold for this
+   * output, based on serialize size and rate.
+   * @param {Rate?} rate
+   * @returns {Amount}
+   */
+
+  getDustThreshold(rate) {
+    const scale = consensus.WITNESS_SCALE_FACTOR;
+
+    if (this.script.isUnspendable())
+      return 0;
+
+    let size = this.getSize();
+
+    if (this.script.isProgram()) {
+      // 75% segwit discount applied to script size.
+      size += 32 + 4 + 1 + (107 / scale | 0) + 4;
+    } else {
+      size += 32 + 4 + 1 + 107 + 4;
+    }
+
+    return 3 * policy.getMinFee(size, rate);
+  }
+
+  /**
+   * Calculate size of serialized output.
+   * @returns {Number}
+   */
+
+  getSize() {
+    return 8 + this.script.getVarSize();
+  }
+
+  /**
+   * Test whether the output should be considered dust.
+   * @param {Rate?} rate
+   * @returns {Boolean}
+   */
+
+  isDust(rate) {
+    return this.value < this.getDustThreshold(rate);
+  }
+
+  /**
+   * Inject properties from a JSON object.
+   * @private
+   * @param {Object} json
+   */
+
+  fromJSON(json) {
+    assert(json, 'Output data is required.');
+    assert(Number.isSafeInteger(json.value) && json.value >= 0,
       'Value must be a uint64.');
-    this.value = options.value;
+    this.value = json.value;
+    this.script.fromJSON(json.script);
+    return this;
   }
 
-  if (options.script)
-    this.script.fromOptions(options.script);
+  /**
+   * Instantiate an Output from a jsonified output object.
+   * @param {Object} json - The jsonified output object.
+   * @returns {Output}
+   */
 
-  if (options.address)
-    this.script.fromAddress(options.address);
-
-  return this;
-};
-
-/**
- * Instantiate output from options object.
- * @param {NakedOutput} options
- * @returns {Output}
- */
-
-Output.fromOptions = function fromOptions(options) {
-  return new Output().fromOptions(options);
-};
-
-/**
- * Inject properties from script/value pair.
- * @private
- * @param {Script|Address} script
- * @param {Amount} value
- * @returns {Output}
- */
-
-Output.prototype.fromScript = function fromScript(script, value) {
-  if (typeof script === 'string')
-    script = Address.fromString(script);
-
-  if (script instanceof Address)
-    script = Script.fromAddress(script);
-
-  assert(script instanceof Script, 'Script must be a Script.');
-  assert(Number.isSafeInteger(value) && value >= 0, 'Value must be a uint64.');
-
-  this.script = script;
-  this.value = value;
-
-  return this;
-};
-
-/**
- * Instantiate output from script/value pair.
- * @param {Script|Address} script
- * @param {Amount} value
- * @returns {Output}
- */
-
-Output.fromScript = function fromScript(script, value) {
-  return new Output().fromScript(script, value);
-};
-
-/**
- * Clone the output.
- * @returns {Output}
- */
-
-Output.prototype.clone = function clone() {
-  const output = new Output();
-  output.value = this.value;
-  output.script.inject(this.script);
-  return output;
-};
-
-/**
- * Test equality against another output.
- * @param {Output} output
- * @returns {Boolean}
- */
-
-Output.prototype.equals = function equals(output) {
-  assert(Output.isOutput(output));
-  return this.value === output.value
-    && this.script.equals(output.script);
-};
-
-/**
- * Compare against another output (BIP69).
- * @param {Output} output
- * @returns {Number}
- */
-
-Output.prototype.compare = function compare(output) {
-  assert(Output.isOutput(output));
-
-  const cmp = this.value - output.value;
-
-  if (cmp !== 0)
-    return cmp;
-
-  return this.script.compare(output.script);
-};
-
-/**
- * Get the script type as a string.
- * @returns {ScriptType} type
- */
-
-Output.prototype.getType = function getType() {
-  return Script.typesByVal[this.script.getType()].toLowerCase();
-};
-
-/**
- * Get the address.
- * @returns {Address} address
- */
-
-Output.prototype.getAddress = function getAddress() {
-  return this.script.getAddress();
-};
-
-/**
- * Get the address hash.
- * @param {String?} enc
- * @returns {Hash} hash
- */
-
-Output.prototype.getHash = function getHash(enc) {
-  const addr = this.getAddress();
-
-  if (!addr)
-    return null;
-
-  return addr.getHash(enc);
-};
-
-/**
- * Convert the input to a more user-friendly object.
- * @returns {Object}
- */
-
-Output.prototype.inspect = function inspect() {
-  return {
-    type: this.getType(),
-    value: Amount.btc(this.value),
-    script: this.script,
-    address: this.getAddress()
-  };
-};
-
-/**
- * Convert the output to an object suitable
- * for JSON serialization.
- * @returns {Object}
- */
-
-Output.prototype.toJSON = function toJSON() {
-  return this.getJSON();
-};
-
-/**
- * Convert the output to an object suitable
- * for JSON serialization.
- * @param {Network} network
- * @returns {Object}
- */
-
-Output.prototype.getJSON = function getJSON(network) {
-  let addr = this.getAddress();
-
-  network = Network.get(network);
-
-  if (addr)
-    addr = addr.toString(network);
-
-  return {
-    value: this.value,
-    script: this.script.toJSON(),
-    address: addr
-  };
-};
-
-/**
- * Calculate the dust threshold for this
- * output, based on serialize size and rate.
- * @param {Rate?} rate
- * @returns {Amount}
- */
-
-Output.prototype.getDustThreshold = function getDustThreshold(rate) {
-  const scale = consensus.WITNESS_SCALE_FACTOR;
-
-  if (this.script.isUnspendable())
-    return 0;
-
-  let size = this.getSize();
-
-  if (this.script.isProgram()) {
-    // 75% segwit discount applied to script size.
-    size += 32 + 4 + 1 + (107 / scale | 0) + 4;
-  } else {
-    size += 32 + 4 + 1 + 107 + 4;
+  static fromJSON(json) {
+    return new this().fromJSON(json);
   }
 
-  return 3 * policy.getMinFee(size, rate);
-};
+  /**
+   * Write the output to a buffer writer.
+   * @param {BufferWriter} bw
+   */
 
-/**
- * Calculate size of serialized output.
- * @returns {Number}
- */
+  toWriter(bw) {
+    bw.writeI64(this.value);
+    bw.writeVarBytes(this.script.toRaw());
+    return bw;
+  }
 
-Output.prototype.getSize = function getSize() {
-  return 8 + this.script.getVarSize();
-};
+  /**
+   * Serialize the output.
+   * @param {String?} enc - Encoding, can be `'hex'` or null.
+   * @returns {Buffer|String}
+   */
 
-/**
- * Test whether the output should be considered dust.
- * @param {Rate?} rate
- * @returns {Boolean}
- */
+  toRaw() {
+    const size = this.getSize();
+    return this.toWriter(new StaticWriter(size)).render();
+  }
 
-Output.prototype.isDust = function isDust(rate) {
-  return this.value < this.getDustThreshold(rate);
-};
+  /**
+   * Inject properties from buffer reader.
+   * @private
+   * @param {BufferReader} br
+   */
 
-/**
- * Inject properties from a JSON object.
- * @private
- * @param {Object} json
- */
+  fromReader(br) {
+    this.value = br.readI64();
+    this.script.fromRaw(br.readVarBytes());
+    return this;
+  }
 
-Output.prototype.fromJSON = function fromJSON(json) {
-  assert(json, 'Output data is required.');
-  assert(Number.isSafeInteger(json.value) && json.value >= 0,
-    'Value must be a uint64.');
-  this.value = json.value;
-  this.script.fromJSON(json.script);
-  return this;
-};
+  /**
+   * Inject properties from serialized data.
+   * @private
+   * @param {Buffer} data
+   */
 
-/**
- * Instantiate an Output from a jsonified output object.
- * @param {Object} json - The jsonified output object.
- * @returns {Output}
- */
+  fromRaw(data) {
+    return this.fromReader(new BufferReader(data));
+  }
 
-Output.fromJSON = function fromJSON(json) {
-  return new Output().fromJSON(json);
-};
+  /**
+   * Instantiate an output from a buffer reader.
+   * @param {BufferReader} br
+   * @returns {Output}
+   */
 
-/**
- * Write the output to a buffer writer.
- * @param {BufferWriter} bw
- */
+  static fromReader(br) {
+    return new this().fromReader(br);
+  }
 
-Output.prototype.toWriter = function toWriter(bw) {
-  bw.writeI64(this.value);
-  bw.writeVarBytes(this.script.toRaw());
-  return bw;
-};
+  /**
+   * Instantiate an output from a serialized Buffer.
+   * @param {Buffer} data
+   * @param {String?} enc - Encoding, can be `'hex'` or null.
+   * @returns {Output}
+   */
 
-/**
- * Serialize the output.
- * @param {String?} enc - Encoding, can be `'hex'` or null.
- * @returns {Buffer|String}
- */
+  static fromRaw(data, enc) {
+    if (typeof data === 'string')
+      data = Buffer.from(data, enc);
+    return new this().fromRaw(data);
+  }
 
-Output.prototype.toRaw = function toRaw() {
-  const size = this.getSize();
-  return this.toWriter(new StaticWriter(size)).render();
-};
+  /**
+   * Test an object to see if it is an Output.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
 
-/**
- * Inject properties from buffer reader.
- * @private
- * @param {BufferReader} br
- */
-
-Output.prototype.fromReader = function fromReader(br) {
-  this.value = br.readI64();
-  this.script.fromRaw(br.readVarBytes());
-  return this;
-};
-
-/**
- * Inject properties from serialized data.
- * @private
- * @param {Buffer} data
- */
-
-Output.prototype.fromRaw = function fromRaw(data) {
-  return this.fromReader(new BufferReader(data));
-};
-
-/**
- * Instantiate an output from a buffer reader.
- * @param {BufferReader} br
- * @returns {Output}
- */
-
-Output.fromReader = function fromReader(br) {
-  return new Output().fromReader(br);
-};
-
-/**
- * Instantiate an output from a serialized Buffer.
- * @param {Buffer} data
- * @param {String?} enc - Encoding, can be `'hex'` or null.
- * @returns {Output}
- */
-
-Output.fromRaw = function fromRaw(data, enc) {
-  if (typeof data === 'string')
-    data = Buffer.from(data, enc);
-  return new Output().fromRaw(data);
-};
-
-/**
- * Test an object to see if it is an Output.
- * @param {Object} obj
- * @returns {Boolean}
- */
-
-Output.isOutput = function isOutput(obj) {
-  return obj instanceof Output;
-};
+  static isOutput(obj) {
+    return obj instanceof Output;
+  }
+}
 
 /*
  * Expose

lib/primitives/txmeta.js

@@ -14,293 +14,297 @@ const BufferReader = require('bufio/lib/reader');
 const encoding = require('bufio/lib/encoding');
 
 /**
+ * TXMeta
  * An extended transaction object.
  * @alias module:primitives.TXMeta
- * @constructor
- * @param {Object} options
  */
 
-function TXMeta(options) {
-  if (!(this instanceof TXMeta))
-    return new TXMeta(options);
+class TXMeta {
+  /**
+   * Create an extended transaction.
+   * @constructor
+   * @param {Object?} options
+   */
 
-  this.tx = new TX();
-  this.mtime = util.now();
-  this.height = -1;
-  this.block = null;
-  this.time = 0;
-  this.index = -1;
+  constructor(options) {
+    this.tx = new TX();
+    this.mtime = util.now();
+    this.height = -1;
+    this.block = null;
+    this.time = 0;
+    this.index = -1;
 
-  if (options)
-    this.fromOptions(options);
+    if (options)
+      this.fromOptions(options);
+  }
+
+  /**
+   * Inject properties from options object.
+   * @private
+   * @param {Object} options
+   */
+
+  fromOptions(options) {
+    if (options.tx) {
+      assert(options.tx instanceof TX);
+      this.tx = options.tx;
+    }
+
+    if (options.mtime != null) {
+      assert((options.mtime >>> 0) === options.mtime);
+      this.mtime = options.mtime;
+    }
+
+    if (options.height != null) {
+      assert(Number.isSafeInteger(options.height));
+      this.height = options.height;
+    }
+
+    if (options.block !== undefined) {
+      assert(options.block === null || typeof options.block === 'string');
+      this.block = options.block;
+    }
+
+    if (options.time != null) {
+      assert((options.time >>> 0) === options.time);
+      this.time = options.time;
+    }
+
+    if (options.index != null) {
+      assert(Number.isSafeInteger(options.index));
+      this.index = options.index;
+    }
+
+    return this;
+  }
+
+  /**
+   * Instantiate TXMeta from options.
+   * @param {Object} options
+   * @returns {TXMeta}
+   */
+
+  static fromOptions(options) {
+    return new this().fromOptions(options);
+  }
+
+  /**
+   * Inject properties from options object.
+   * @private
+   * @param {Object} options
+   */
+
+  fromTX(tx, entry, index) {
+    this.tx = tx;
+    if (entry) {
+      this.height = entry.height;
+      this.block = entry.hash;
+      this.time = entry.time;
+      this.index = index;
+    }
+    return this;
+  }
+
+  /**
+   * Instantiate TXMeta from options.
+   * @param {Object} options
+   * @returns {TXMeta}
+   */
+
+  static fromTX(tx, entry, index) {
+    return new this().fromTX(tx, entry, index);
+  }
+
+  /**
+   * Inspect the transaction.
+   * @returns {Object}
+   */
+
+  inspect() {
+    return this.format();
+  }
+
+  /**
+   * Inspect the transaction.
+   * @returns {Object}
+   */
+
+  format(view) {
+    const data = this.tx.format(view, null, this.index);
+    data.mtime = this.mtime;
+    data.height = this.height;
+    data.block = this.block ? encoding.revHex(this.block) : null;
+    data.time = this.time;
+    return data;
+  }
+
+  /**
+   * Convert transaction to JSON.
+   * @returns {Object}
+   */
+
+  toJSON() {
+    return this.getJSON();
+  }
+
+  /**
+   * Convert the transaction to an object suitable
+   * for JSON serialization.
+   * @param {Network} network
+   * @param {CoinView} view
+   * @returns {Object}
+   */
+
+  getJSON(network, view, chainHeight) {
+    const json = this.tx.getJSON(network, view, null, this.index);
+    json.mtime = this.mtime;
+    json.height = this.height;
+    json.block = this.block ? encoding.revHex(this.block) : null;
+    json.time = this.time;
+    json.confirmations = 0;
+
+    if (chainHeight != null)
+      json.confirmations = chainHeight - this.height + 1;
+
+    return json;
+  }
+
+  /**
+   * Inject properties from a json object.
+   * @private
+   * @param {Object} json
+   */
+
+  fromJSON(json) {
+    this.tx.fromJSON(json);
+
+    assert((json.mtime >>> 0) === json.mtime);
+    assert(Number.isSafeInteger(json.height));
+    assert(!json.block || typeof json.block === 'string');
+    assert((json.time >>> 0) === json.time);
+    assert(Number.isSafeInteger(json.index));
+
+    this.mtime = json.mtime;
+    this.height = json.height;
+    this.block = encoding.revHex(json.block);
+    this.index = json.index;
+
+    return this;
+  }
+
+  /**
+   * Instantiate a transaction from a
+   * jsonified transaction object.
+   * @param {Object} json - The jsonified transaction object.
+   * @returns {TX}
+   */
+
+  static fromJSON(json) {
+    return new this().fromJSON(JSON);
+  }
+
+  /**
+   * Calculate serialization size.
+   * @returns {Number}
+   */
+
+  getSize() {
+    let size = 0;
+
+    size += this.tx.getSize();
+    size += 4;
+
+    if (this.block) {
+      size += 1;
+      size += 32;
+      size += 4 * 3;
+    } else {
+      size += 1;
+    }
+
+    return size;
+  }
+
+  /**
+   * Serialize a transaction to "extended format".
+   * This is the serialization format bcoin uses internally
+   * to store transactions in the database. The extended
+   * serialization includes the height, block hash, index,
+   * timestamp, and pending-since time.
+   * @returns {Buffer}
+   */
+
+  toRaw() {
+    const size = this.getSize();
+    const bw = new StaticWriter(size);
+
+    this.tx.toWriter(bw);
+
+    bw.writeU32(this.mtime);
+
+    if (this.block) {
+      bw.writeU8(1);
+      bw.writeHash(this.block);
+      bw.writeU32(this.height);
+      bw.writeU32(this.time);
+      bw.writeU32(this.index);
+    } else {
+      bw.writeU8(0);
+    }
+
+    return bw.render();
+  }
+
+  /**
+   * Inject properties from "extended" serialization format.
+   * @private
+   * @param {Buffer} data
+   */
+
+  fromRaw(data) {
+    const br = new BufferReader(data);
+
+    this.tx.fromReader(br);
+
+    this.mtime = br.readU32();
+
+    if (br.readU8() === 1) {
+      this.block = br.readHash('hex');
+      this.height = br.readU32();
+      this.time = br.readU32();
+      this.index = br.readU32();
+      if (this.index === 0x7fffffff)
+        this.index = -1;
+    }
+
+    return this;
+  }
+
+  /**
+   * Instantiate a transaction from a Buffer
+   * in "extended" serialization format.
+   * @param {Buffer} data
+   * @param {String?} enc - One of `"hex"` or `null`.
+   * @returns {TX}
+   */
+
+  static fromRaw(data, enc) {
+    if (typeof data === 'string')
+      data = Buffer.from(data, enc);
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Test whether an object is an TXMeta.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
+
+  static isTXMeta(obj) {
+    return obj instanceof TXMeta;
+  }
 }
 
-/**
- * Inject properties from options object.
- * @private
- * @param {Object} options
- */
-
-TXMeta.prototype.fromOptions = function fromOptions(options) {
-  if (options.tx) {
-    assert(options.tx instanceof TX);
-    this.tx = options.tx;
-  }
-
-  if (options.mtime != null) {
-    assert((options.mtime >>> 0) === options.mtime);
-    this.mtime = options.mtime;
-  }
-
-  if (options.height != null) {
-    assert(Number.isSafeInteger(options.height));
-    this.height = options.height;
-  }
-
-  if (options.block !== undefined) {
-    assert(options.block === null || typeof options.block === 'string');
-    this.block = options.block;
-  }
-
-  if (options.time != null) {
-    assert((options.time >>> 0) === options.time);
-    this.time = options.time;
-  }
-
-  if (options.index != null) {
-    assert(Number.isSafeInteger(options.index));
-    this.index = options.index;
-  }
-
-  return this;
-};
-
-/**
- * Instantiate TXMeta from options.
- * @param {Object} options
- * @returns {TXMeta}
- */
-
-TXMeta.fromOptions = function fromOptions(options) {
-  return new TXMeta().fromOptions(options);
-};
-
-/**
- * Inject properties from options object.
- * @private
- * @param {Object} options
- */
-
-TXMeta.prototype.fromTX = function fromTX(tx, entry, index) {
-  this.tx = tx;
-  if (entry) {
-    this.height = entry.height;
-    this.block = entry.hash;
-    this.time = entry.time;
-    this.index = index;
-  }
-  return this;
-};
-
-/**
- * Instantiate TXMeta from options.
- * @param {Object} options
- * @returns {TXMeta}
- */
-
-TXMeta.fromTX = function fromTX(tx, entry, index) {
-  return new TXMeta().fromTX(tx, entry, index);
-};
-
-/**
- * Inspect the transaction.
- * @returns {Object}
- */
-
-TXMeta.prototype.inspect = function inspect() {
-  return this.format();
-};
-
-/**
- * Inspect the transaction.
- * @returns {Object}
- */
-
-TXMeta.prototype.format = function format(view) {
-  const data = this.tx.format(view, null, this.index);
-  data.mtime = this.mtime;
-  data.height = this.height;
-  data.block = this.block ? encoding.revHex(this.block) : null;
-  data.time = this.time;
-  return data;
-};
-
-/**
- * Convert transaction to JSON.
- * @returns {Object}
- */
-
-TXMeta.prototype.toJSON = function toJSON() {
-  return this.getJSON();
-};
-
-/**
- * Convert the transaction to an object suitable
- * for JSON serialization.
- * @param {Network} network
- * @param {CoinView} view
- * @returns {Object}
- */
-
-TXMeta.prototype.getJSON = function getJSON(network, view, chainHeight) {
-  const json = this.tx.getJSON(network, view, null, this.index);
-  json.mtime = this.mtime;
-  json.height = this.height;
-  json.block = this.block ? encoding.revHex(this.block) : null;
-  json.time = this.time;
-  json.confirmations = 0;
-
-  if (chainHeight != null)
-    json.confirmations = chainHeight - this.height + 1;
-
-  return json;
-};
-
-/**
- * Inject properties from a json object.
- * @private
- * @param {Object} json
- */
-
-TXMeta.prototype.fromJSON = function fromJSON(json) {
-  this.tx.fromJSON(json);
-
-  assert((json.mtime >>> 0) === json.mtime);
-  assert(Number.isSafeInteger(json.height));
-  assert(!json.block || typeof json.block === 'string');
-  assert((json.time >>> 0) === json.time);
-  assert(Number.isSafeInteger(json.index));
-
-  this.mtime = json.mtime;
-  this.height = json.height;
-  this.block = encoding.revHex(json.block);
-  this.index = json.index;
-
-  return this;
-};
-
-/**
- * Instantiate a transaction from a
- * jsonified transaction object.
- * @param {Object} json - The jsonified transaction object.
- * @returns {TX}
- */
-
-TXMeta.fromJSON = function fromJSON(json) {
-  return new TXMeta().fromJSON(JSON);
-};
-
-/**
- * Calculate serialization size.
- * @returns {Number}
- */
-
-TXMeta.prototype.getSize = function getSize() {
-  let size = 0;
-
-  size += this.tx.getSize();
-  size += 4;
-
-  if (this.block) {
-    size += 1;
-    size += 32;
-    size += 4 * 3;
-  } else {
-    size += 1;
-  }
-
-  return size;
-};
-
-/**
- * Serialize a transaction to "extended format".
- * This is the serialization format bcoin uses internally
- * to store transactions in the database. The extended
- * serialization includes the height, block hash, index,
- * timestamp, and pending-since time.
- * @returns {Buffer}
- */
-
-TXMeta.prototype.toRaw = function toRaw() {
-  const size = this.getSize();
-  const bw = new StaticWriter(size);
-
-  this.tx.toWriter(bw);
-
-  bw.writeU32(this.mtime);
-
-  if (this.block) {
-    bw.writeU8(1);
-    bw.writeHash(this.block);
-    bw.writeU32(this.height);
-    bw.writeU32(this.time);
-    bw.writeU32(this.index);
-  } else {
-    bw.writeU8(0);
-  }
-
-  return bw.render();
-};
-
-/**
- * Inject properties from "extended" serialization format.
- * @private
- * @param {Buffer} data
- */
-
-TXMeta.prototype.fromRaw = function fromRaw(data) {
-  const br = new BufferReader(data);
-
-  this.tx.fromReader(br);
-
-  this.mtime = br.readU32();
-
-  if (br.readU8() === 1) {
-    this.block = br.readHash('hex');
-    this.height = br.readU32();
-    this.time = br.readU32();
-    this.index = br.readU32();
-    if (this.index === 0x7fffffff)
-      this.index = -1;
-  }
-
-  return this;
-};
-
-/**
- * Instantiate a transaction from a Buffer
- * in "extended" serialization format.
- * @param {Buffer} data
- * @param {String?} enc - One of `"hex"` or `null`.
- * @returns {TX}
- */
-
-TXMeta.fromRaw = function fromRaw(data, enc) {
-  if (typeof data === 'string')
-    data = Buffer.from(data, enc);
-  return new TXMeta().fromRaw(data);
-};
-
-/**
- * Test whether an object is an TXMeta.
- * @param {Object} obj
- * @returns {Boolean}
- */
-
-TXMeta.isTXMeta = function isTXMeta(obj) {
-  return obj instanceof TXMeta;
-};
-
 /*
  * Expose
  */

lib/wallet/walletkey.js

@@ -12,273 +12,276 @@ const KeyRing = require('../primitives/keyring');
 const Path = require('./path');
 
 /**
+ * Wallet Key
  * Represents a key ring which amounts to an address.
  * @alias module:wallet.WalletKey
- * @constructor
- * @param {Object} options
+ * @extends KeyRing
  */
 
-function WalletKey(options) {
-  if (!(this instanceof WalletKey))
-    return new WalletKey(options);
+class WalletKey extends KeyRing {
+  /**
+   * Create a wallet key.
+   * @constructor
+   * @param {Object?} options
+   */
 
-  KeyRing.call(this, options);
+  constructor(options) {
+    super(options);
 
-  this.keyType = Path.types.HD;
+    this.keyType = Path.types.HD;
 
-  this.name = null;
-  this.account = -1;
-  this.branch = -1;
-  this.index = -1;
-}
-
-Object.setPrototypeOf(WalletKey.prototype, KeyRing.prototype);
-
-/**
- * Instantiate key ring from options.
- * @param {Object} options
- * @returns {WalletKey}
- */
-
-WalletKey.fromOptions = function fromOptions(options) {
-  return new WalletKey().fromOptions(options);
-};
-
-/**
- * Instantiate wallet key from a private key.
- * @param {Buffer} key
- * @param {Boolean?} compressed
- * @returns {WalletKey}
- */
-
-WalletKey.fromPrivate = function fromPrivate(key, compressed) {
-  return new WalletKey().fromPrivate(key, compressed);
-};
-
-/**
- * Generate a wallet key.
- * @param {Boolean?} compressed
- * @returns {WalletKey}
- */
-
-WalletKey.generate = function generate(compressed) {
-  return new WalletKey().generate(compressed);
-};
-
-/**
- * Instantiate wallet key from a public key.
- * @param {Buffer} publicKey
- * @returns {WalletKey}
- */
-
-WalletKey.fromPublic = function fromPublic(key) {
-  return new WalletKey().fromPublic(key);
-};
-
-/**
- * Instantiate wallet key from a public key.
- * @param {Buffer} publicKey
- * @returns {WalletKey}
- */
-
-WalletKey.fromKey = function fromKey(key, compressed) {
-  return new WalletKey().fromKey(key, compressed);
-};
-
-/**
- * Instantiate wallet key from script.
- * @param {Buffer} key
- * @param {Script} script
- * @returns {WalletKey}
- */
-
-WalletKey.fromScript = function fromScript(key, script, compressed) {
-  return new WalletKey().fromScript(key, script, compressed);
-};
-
-/**
- * Instantiate a wallet key from a serialized CBitcoinSecret.
- * @param {Base58String} secret
- * @param {Network?} network
- * @returns {WalletKey}
- */
-
-WalletKey.fromSecret = function fromSecret(data, network) {
-  return new WalletKey().fromSecret(data, network);
-};
-
-/**
- * Convert an WalletKey to a more json-friendly object.
- * @returns {Object}
- */
-
-WalletKey.prototype.toJSON = function toJSON(network) {
-  return {
-    name: this.name,
-    account: this.account,
-    branch: this.branch,
-    index: this.index,
-    witness: this.witness,
-    nested: this.nested,
-    publicKey: this.publicKey.toString('hex'),
-    script: this.script ? this.script.toRaw().toString('hex') : null,
-    program: this.witness ? this.getProgram().toRaw().toString('hex') : null,
-    type: Address.typesByVal[this.getType()].toLowerCase(),
-    address: this.getAddress('string', network)
-  };
-};
-
-/**
- * Instantiate an WalletKey from a jsonified transaction object.
- * @param {Object} json - The jsonified transaction object.
- * @returns {WalletKey}
- */
-
-WalletKey.fromJSON = function fromJSON(json) {
-  return new WalletKey().fromJSON(json);
-};
-
-/**
- * Instantiate a wallet key from serialized data.
- * @param {Buffer} data
- * @returns {WalletKey}
- */
-
-WalletKey.fromRaw = function fromRaw(data) {
-  return new WalletKey().fromRaw(data);
-};
-
-/**
- * Inject properties from hd key.
- * @private
- * @param {Account} account
- * @param {HDPrivateKey|HDPublicKey} key
- * @param {Number} branch
- * @param {Number} index
- * @returns {WalletKey}
- */
-
-WalletKey.prototype.fromHD = function fromHD(account, key, branch, index) {
-  this.keyType = Path.types.HD;
-  this.name = account.name;
-  this.account = account.accountIndex;
-  this.branch = branch;
-  this.index = index;
-  this.witness = account.witness;
-  this.nested = branch === 2;
-
-  if (key.privateKey)
-    return this.fromPrivate(key.privateKey);
-
-  return this.fromPublic(key.publicKey);
-};
-
-/**
- * Instantiate a wallet key from hd key.
- * @param {Account} account
- * @param {HDPrivateKey|HDPublicKey} key
- * @param {Number} branch
- * @param {Number} index
- * @returns {WalletKey}
- */
-
-WalletKey.fromHD = function fromHD(account, key, branch, index) {
-  return new WalletKey().fromHD(account, key, branch, index);
-};
-
-/**
- * Inject properties from imported data.
- * @private
- * @param {Account} account
- * @param {Buffer} data
- * @returns {WalletKey}
- */
-
-WalletKey.prototype.fromImport = function fromImport(account, data) {
-  this.keyType = Path.types.KEY;
-  this.name = account.name;
-  this.account = account.accountIndex;
-  this.witness = account.witness;
-  return this.fromRaw(data);
-};
-
-/**
- * Instantiate a wallet key from imported data.
- * @param {Account} account
- * @param {Buffer} data
- * @returns {WalletKey}
- */
-
-WalletKey.fromImport = function fromImport(account, data) {
-  return new WalletKey().fromImport(account, data);
-};
-
-/**
- * Inject properties from key.
- * @private
- * @param {Account} account
- * @param {KeyRing} ring
- * @returns {WalletKey}
- */
-
-WalletKey.prototype.fromRing = function fromRing(account, ring) {
-  this.keyType = Path.types.KEY;
-  this.name = account.name;
-  this.account = account.accountIndex;
-  this.witness = account.witness;
-  return this.fromOptions(ring);
-};
-
-/**
- * Instantiate a wallet key from regular key.
- * @param {Account} account
- * @param {KeyRing} ring
- * @returns {WalletKey}
- */
-
-WalletKey.fromRing = function fromRing(account, ring) {
-  return new WalletKey().fromRing(account, ring);
-};
-
-/**
- * Convert wallet key to a path.
- * @returns {Path}
- */
-
-WalletKey.prototype.toPath = function toPath() {
-  const path = new Path();
-
-  path.name = this.name;
-  path.account = this.account;
-
-  switch (this.keyType) {
-    case Path.types.HD:
-      path.branch = this.branch;
-      path.index = this.index;
-      break;
-    case Path.types.KEY:
-      path.data = this.toRaw();
-      break;
+    this.name = null;
+    this.account = -1;
+    this.branch = -1;
+    this.index = -1;
   }
 
-  path.keyType = this.keyType;
+  /**
+   * Instantiate key ring from options.
+   * @param {Object} options
+   * @returns {WalletKey}
+   */
 
-  path.version = this.getVersion();
-  path.type = this.getType();
-  path.hash = this.getHash('hex');
+  static fromOptions(options) {
+    return new this().fromOptions(options);
+  }
 
-  return path;
-};
+  /**
+   * Instantiate wallet key from a private key.
+   * @param {Buffer} key
+   * @param {Boolean?} compressed
+   * @returns {WalletKey}
+   */
 
-/**
- * Test whether an object is a WalletKey.
- * @param {Object} obj
- * @returns {Boolean}
- */
+  static fromPrivate(key, compressed) {
+    return new this().fromPrivate(key, compressed);
+  }
 
-WalletKey.isWalletKey = function isWalletKey(obj) {
-  return obj instanceof WalletKey;
-};
+  /**
+   * Generate a wallet key.
+   * @param {Boolean?} compressed
+   * @returns {WalletKey}
+   */
+
+  static generate(compressed) {
+    return new this().generate(compressed);
+  }
+
+  /**
+   * Instantiate wallet key from a public key.
+   * @param {Buffer} publicKey
+   * @returns {WalletKey}
+   */
+
+  static fromPublic(key) {
+    return new this().fromPublic(key);
+  }
+
+  /**
+   * Instantiate wallet key from a public key.
+   * @param {Buffer} publicKey
+   * @returns {WalletKey}
+   */
+
+  static fromKey(key, compressed) {
+    return new this().fromKey(key, compressed);
+  }
+
+  /**
+   * Instantiate wallet key from script.
+   * @param {Buffer} key
+   * @param {Script} script
+   * @returns {WalletKey}
+   */
+
+  static fromScript(key, script, compressed) {
+    return new this().fromScript(key, script, compressed);
+  }
+
+  /**
+   * Instantiate a wallet key from a serialized CBitcoinSecret.
+   * @param {Base58String} secret
+   * @param {Network?} network
+   * @returns {WalletKey}
+   */
+
+  static fromSecret(data, network) {
+    return new this().fromSecret(data, network);
+  }
+
+  /**
+   * Convert an WalletKey to a more json-friendly object.
+   * @returns {Object}
+   */
+
+  toJSON(network) {
+    return {
+      name: this.name,
+      account: this.account,
+      branch: this.branch,
+      index: this.index,
+      witness: this.witness,
+      nested: this.nested,
+      publicKey: this.publicKey.toString('hex'),
+      script: this.script ? this.script.toRaw().toString('hex') : null,
+      program: this.witness ? this.getProgram().toRaw().toString('hex') : null,
+      type: Address.typesByVal[this.getType()].toLowerCase(),
+      address: this.getAddress('string', network)
+    };
+  }
+
+  /**
+   * Instantiate an WalletKey from a jsonified transaction object.
+   * @param {Object} json - The jsonified transaction object.
+   * @returns {WalletKey}
+   */
+
+  static fromJSON(json) {
+    return new this().fromJSON(json);
+  }
+
+  /**
+   * Instantiate a wallet key from serialized data.
+   * @param {Buffer} data
+   * @returns {WalletKey}
+   */
+
+  static fromRaw(data) {
+    return new this().fromRaw(data);
+  }
+
+  /**
+   * Inject properties from hd key.
+   * @private
+   * @param {Account} account
+   * @param {HDPrivateKey|HDPublicKey} key
+   * @param {Number} branch
+   * @param {Number} index
+   * @returns {WalletKey}
+   */
+
+  fromHD(account, key, branch, index) {
+    this.keyType = Path.types.HD;
+    this.name = account.name;
+    this.account = account.accountIndex;
+    this.branch = branch;
+    this.index = index;
+    this.witness = account.witness;
+    this.nested = branch === 2;
+
+    if (key.privateKey)
+      return this.fromPrivate(key.privateKey);
+
+    return this.fromPublic(key.publicKey);
+  }
+
+  /**
+   * Instantiate a wallet key from hd key.
+   * @param {Account} account
+   * @param {HDPrivateKey|HDPublicKey} key
+   * @param {Number} branch
+   * @param {Number} index
+   * @returns {WalletKey}
+   */
+
+  static fromHD(account, key, branch, index) {
+    return new this().fromHD(account, key, branch, index);
+  }
+
+  /**
+   * Inject properties from imported data.
+   * @private
+   * @param {Account} account
+   * @param {Buffer} data
+   * @returns {WalletKey}
+   */
+
+  fromImport(account, data) {
+    this.keyType = Path.types.KEY;
+    this.name = account.name;
+    this.account = account.accountIndex;
+    this.witness = account.witness;
+    return this.fromRaw(data);
+  }
+
+  /**
+   * Instantiate a wallet key from imported data.
+   * @param {Account} account
+   * @param {Buffer} data
+   * @returns {WalletKey}
+   */
+
+  static fromImport(account, data) {
+    return new this().fromImport(account, data);
+  }
+
+  /**
+   * Inject properties from key.
+   * @private
+   * @param {Account} account
+   * @param {KeyRing} ring
+   * @returns {WalletKey}
+   */
+
+  fromRing(account, ring) {
+    this.keyType = Path.types.KEY;
+    this.name = account.name;
+    this.account = account.accountIndex;
+    this.witness = account.witness;
+    return this.fromOptions(ring);
+  }
+
+  /**
+   * Instantiate a wallet key from regular key.
+   * @param {Account} account
+   * @param {KeyRing} ring
+   * @returns {WalletKey}
+   */
+
+  static fromRing(account, ring) {
+    return new this().fromRing(account, ring);
+  }
+
+  /**
+   * Convert wallet key to a path.
+   * @returns {Path}
+   */
+
+  toPath() {
+    const path = new Path();
+
+    path.name = this.name;
+    path.account = this.account;
+
+    switch (this.keyType) {
+      case Path.types.HD:
+        path.branch = this.branch;
+        path.index = this.index;
+        break;
+      case Path.types.KEY:
+        path.data = this.toRaw();
+        break;
+    }
+
+    path.keyType = this.keyType;
+
+    path.version = this.getVersion();
+    path.type = this.getType();
+    path.hash = this.getHash('hex');
+
+    return path;
+  }
+
+  /**
+   * Test whether an object is a WalletKey.
+   * @param {Object} obj
+   * @returns {Boolean}
+   */
+
+  static isWalletKey(obj) {
+    return obj instanceof WalletKey;
+  }
+}
 
 /*
  * Expose

test/util/memwallet.js

@@ -168,7 +168,7 @@ MemWallet.prototype.getUndo = function getUndo(key) {
 };
 
 MemWallet.prototype.addCoin = function addCoin(coin) {
-  const op = Outpoint(coin.hash, coin.index);
+  const op = new Outpoint(coin.hash, coin.index);
   const key = op.toKey();
 
   this.filter.add(op.toRaw());
@@ -301,7 +301,7 @@ MemWallet.prototype.removeTX = function removeTX(tx, height) {
     return false;
 
   for (let i = 0; i < tx.outputs.length; i++) {
-    const op = Outpoint(hash, i).toKey();
+    const op = new Outpoint(hash, i).toKey();
     const coin = this.getCoin(op);
 
     if (!coin)