diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index 0f7c93c8..3dd56179 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -593,7 +593,8 @@ Chain.prototype._verify = function _verify(block, prev, callback) {
  * @private
  * @param {Block} block
  * @param {ChainBlock} prev
- * @param {Function} callback - Returns [{@link VerifyError}, Object].
+ * @param {Function} callback - Returns
+ * [{@link VerifyError}, {@link DeploymentState}].
  */
 
 Chain.prototype._checkDeployments = function _checkDeployments(block, prev, callback) {
diff --git a/lib/bcoin/mtx.js b/lib/bcoin/mtx.js
index 95affd97..52bfe319 100644
--- a/lib/bcoin/mtx.js
+++ b/lib/bcoin/mtx.js
@@ -1046,12 +1046,7 @@ MTX.prototype.maxSize = function maxSize(options, force) {
  * @param {BN?} options.fee - Use a hard fee rather than calculating one.
  * @param {Number|Boolean} options.subtractFee - Whether to subtract the
  * fee from * existing outputs rather than adding more inputs.
- * @returns {Object} {
- *   chosen: {@link Coin}[],
- *   change: {@link BN},
- *   fee: {@link BN},
- *   total: {@link BN}
- * }
+ * @returns {CoinSelection}
  * @throws on not enough funds available.
  * @throws on unable to subtract fee.
  */
@@ -1099,7 +1094,7 @@ MTX.prototype.selectCoins = function selectCoins(coins, options) {
     var coin;
 
     while (index < coins.length) {
-      coin = coins[index];
+      coin = coins[index++];
 
       if (options.confirmed && coin.height === -1)
         continue;
@@ -1114,7 +1109,6 @@ MTX.prototype.selectCoins = function selectCoins(coins, options) {
       // and fee.
       tx.addInput(coin);
       chosen.push(coin);
-      index++;
 
       if (options.selection === 'all')
         continue;
diff --git a/lib/bcoin/types.js b/lib/bcoin/types.js
index e0b6ee2f..e617d831 100644
--- a/lib/bcoin/types.js
+++ b/lib/bcoin/types.js
@@ -1,126 +1,126 @@
 /**
  * An inverse enum. Retrieves key by value.
- * @global
  * @typedef {Object} RevMap
+ * @global
  */
 
 /**
  * @typedef {Object} InvItem
- * @global
  * @property {Number|String} type - Inv type. See {@link constants.inv}.
  * @property {Hash|Buffer} hash
+ * @global
  */
 
 /**
  * @typedef {Object} Outpoint
- * @global
  * @property {Hash} hash
  * @property {Number} index
+ * @global
  */
 
 /**
  * Can be `pubkeyhash`, `scripthash`, `witnesspubkeyhash`,
  * or `witnessscripthash`, or an address prefix
  * (see {@link network.address}).
- * @global
  * @typedef {String|Number} AddressType
+ * @global
  */
 
 /**
  * @typedef {Object} ParsedAddress
- * @global
  * @property {Number?} version - Witness program version (-1 if not present).
  * @property {AddressType} type
  * @property {Buffer} hash
+ * @global
  */
 
 /**
  * A bitfield containing locktime flags.
- * @global
  * @typedef {Number} LockFlags
+ * @global
  */
 
 /**
  * @typedef {Object} Seed
- * @global
  * @property {String} host
  * @property {Number} port
+ * @global
  */
 
 /**
  * @typedef {EventEmitter} BroadcastPromise
- * @global
  * @emits BroadcastPromise#ack
  * @emits BroadcastPromise#timeout
  * @emits BroadcastPromise#reject
+ * @global
  */
 
 /**
  * @typedef {Object} ParsedURI
- * @global
  * @property {Base58Address} address
  * @property {BN?} amount? - Amount in satoshis.
  * @property {String?} label
  * @property {String?} message
  * @property {String?} request - Payment request URL.
+ * @global
  */
 
 /**
  * Wallet ID
- * @global
  * @typedef {String} WalletID
+ * @global
  */
 
 /**
  * Base58 string.
- * @global
  * @typedef {String} Base58String
+ * @global
  */
 
 /**
  * Base58 address.
- * @global
  * @typedef {String} Base58Address
+ * @global
  */
 
 /**
  * Hex-string hash.
- * @global
  * @typedef {String} Hash
+ * @global
  */
 
 /**
  * Reversed hex-string hash (uint256le).
- * @global
  * @typedef {String} ReversedHash
+ * @global
  */
 
 /**
  * Signature hash type. One of `all`, `single`, `none`, or
  * one of {@link constants.hashType}.
- * @global
  * @typedef {String|Number} SighashType
+ * @global
  */
 
 /**
  * Wallet balance.
- * @global
  * @typedef {Object} Balance
  * @property {BN} confirmed
  * @property {BN} unconfirmed
  * @property {BN} total
+ * @global
  */
 
 /**
  * A big number (bn.js)
- * @global
  * @typedef {Object} BN
+ * @global
  */
 
 /**
  * A bitfield containing script verify flags.
- * @global
  * @typedef {Number} VerifyFlags
+ * @global
  */
 
 /**
@@ -130,63 +130,76 @@
  * version (treated as anyone-can-spend). Otherwise one of `witnesspubkeyhash`
  * or `witnessscripthash`.
  * @property {Buffer} data - Usually the hash.
+ * @global
  */
 
 /**
  * @typedef {Object} Orphan
  * @property {Hash} hash - Orphan TX hash.
  * @property {Number} index - Orphan input index.
+ * @global
+ */
+
+/**
+ * @typedef {Object} CoinSelection
+ * @property {Coin[]?} chosen - Selected coins.
+ * @property {BN} change - Amount of change to add.
+ * @property {BN} fee - Estimated fee.
+ * @property {BN} total - Total value.
+ * @global
+ */
+
+/**
+ * @typedef {Object} DeploymentState
+ * @property {VerifyFlags} flags
+ * @property {LockFlags} lockFlags
+ * @property {Boolean} coinbaseHeight - Whether coinbase height is enforced.
+ * @property {Boolean} segwit
+ * @property {Boolean} csv
+ * @global
  */
 
 /**
  * @typedef {Object} SubmitOrderPacket
- * @global
  * @property {Hash} hash
  * @property {NakedTX} tx
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} ReplyPacket
- * @global
  * @property {Hash} hash
  * @property {Number} code
  * @property {Buffer} publicKey
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} FilterLoadPacket
- * @global
  * @see Bloom
  * @property {Buffer} filter - Serialized bloom filter.
  * @property {Number} n - Number of hash functions.
  * @property {Number} tweak - Bloom filter seed.
  * @property {String|Number} update (See {@link constants.filterFlags}).
- * @property {Number} _size
+ * @global
  */
 
-
 /**
  * @typedef {Object} FilterAddPacket
- * @global
  * @see Bloom
  * @property {Buffer} data - Data to add to filter.
- * @property {Number} _size
+ * @global
  */
 
-
 /**
  * @typedef {Object} GetUTXOsPacket
- * @global
  * @property {Boolean} mempool - Check mempool.
  * @property {Outpoint[]} prevout - Outpoints.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedCoin
- * @global
  * @property {Number} version - Transaction version.
  * @property {Number} height - Transaction height (-1 if unconfirmed).
  * @property {BN} value - Output value in satoshis.
@@ -195,30 +208,28 @@
  * transaction is a coinbase.
  * @property {Hash} hash - Transaction hash.
  * @property {Number} index - Output index.
+ * @global
  */
 
 /**
  * @typedef {Object} UTXOsPacket
- * @global
  * @property {Array?} data.hits - Hits (array of
  * 1s and 0s representing a bit mask).
  * @property {Buffer?} data.map - Hit map.
  * @property {Object} data.height - Chain height.
  * @property {Hash} data.tip - Chain tip hash.
  * @property {NakedCoin[]} data.coins
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} PingPacket
- * @global
  * @property {BN} nonce
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NetworkAddress
- * @global
  * @property {Number?} ts - Timestamp.
  * @property {Number?} services - Service bits.
  * @property {Buffer?} ipv4 - IPv4 address.
@@ -228,12 +239,11 @@
  * @property {Boolean?} getutxo - Whether peer supports getutxos.
  * @property {Boolean?} bloom - Whether peer supports serving FILTERED_BLOCKs.
  * @property {Boolean?} witness - Whether peer supports segwit.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} VersionPacket
- * @global
  * @property {Number} version - Protocol version.
  * @property {Number} services - Service bits.
  * @property {Number} ts - Timestamp of discovery.
@@ -244,21 +254,19 @@
  * @property {Number} height - Chain height.
  * @property {Boolean} relay - Whether transactions
  * should be relayed immediately.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} GetBlocksPacket
- * @global
  * @property {Number} version - Protocol version.
  * @property {Hash[]} locator - Chain locator.
  * @property {Hash} stop - Hash to stop at.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedBlock
- * @global
  * @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.
@@ -273,30 +281,27 @@
  * @property {Hash[]?} hashes - Only present on merkleblocks.
  * @property {Buffer?} flags - Only present on merkleblocks.
  * @property {Number?} coinbaseHeight - Only present on compactblocks.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedInput
- * @global
  * @property {Outpoint} prevout
  * @property {NakedScript} script - Input script.
  * @property {Number} sequence - nSequence.
  * @property {NakedWitness} witness - Witness.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedOutput
- * @global
  * @property {BN} value - Value in satoshis.
  * @property {NakedScript} script - Output script.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedCoin
- * @global
  * @property {Number} version - Transaction version.
  * @property {Number} height - Transaction height (-1 if unconfirmed).
  * @property {BN} value - Output value in satoshis.
@@ -305,49 +310,44 @@
  * transaction is a coinbase.
  * @property {Hash} hash - Transaction hash.
  * @property {Number} index - Output index.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedTX
- * @global
  * @property {Number} version
  * @property {Number} flag
  * @property {NakedInput[]} inputs
  * @property {NakedOutput[]} outputs
  * @property {Number} locktime
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedScript
- * @global
  * @property {Buffer} raw - Raw code.
  * @property {Array} code - Parsed code.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} NakedWitness
- * @global
  * @param {Buffer[]} items - Stack items.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} RejectPacket
- * @global
  * @param {(Number|String)?} ccode - Code
  * (see {@link constants.reject}).
  * @param {String?} msg - Message.
  * @param {String?} reason - Reason.
  * @param {(Hash|Buffer)?} data - Transaction or block hash.
- * @property {Number} _size
+ * @global
  */
 
 /**
  * @typedef {Object} AlertPacket
- * @global
  * @property {Number} version
  * @property {Number} relayUntil
  * @property {Number} expiration
@@ -364,5 +364,192 @@
  * @property {Buffer?} payload - Payload.
  * @property {Buffer?} signature - Payload signature.
  * @property {Buffer?} key - Private key to sign with.
- * @property {Number} _size
+ * @global
+ */
+
+/*
+ * Callbacks & Events
+ */
+
+/**
+ * @callback TXCallback
+ * @param {Error?} err
+ * @param {TX} tx
+ * @global
+ */
+
+/**
+ * @callback TXSCallback
+ * @param {Error?} err
+ * @param {TX[]} txs
+ * @global
+ */
+
+/**
+ * @callback MTXCallback
+ * @param {Error?} err
+ * @param {MTX} tx
+ * @global
+ */
+
+/**
+ * @callback MTXSCallback
+ * @param {Error?} err
+ * @param {MTX[]} txs
+ * @global
+ */
+
+/**
+ * @callback CoinCallback
+ * @param {Error?} err
+ * @param {Coin} tx
+ * @global
+ */
+
+/**
+ * @callback CoinsCallback
+ * @param {Error?} err
+ * @param {Coin[]} tx
+ * @global
+ */
+
+/**
+ * @callback VerifyCallback
+ * @param {VerifyError?} err
+ * @global
+ */
+
+/**
+ * @callback BlockCallback
+ * @param {Error?} err
+ * @param {Block} block
+ * @global
+ */
+
+/**
+ * @callback EntryCallback
+ * @param {Error?} err
+ * @param {ChainBlock} entry
+ * @global
+ */
+
+/**
+ * @callback EntriesCallback
+ * @param {Error?} err
+ * @param {ChainBlock[]} entry
+ * @global
+ */
+
+/**
+ * @callback BalanceCallback
+ * @param {Error?} err
+ * @param {Balance} balance
+ * @global
+ */
+
+/**
+ * @callback BooleanCallback
+ * @param {Error?} err
+ * @param {Boolean} result
+ * @global
+ */
+
+/**
+ * @callback NumberCallback
+ * @param {Error?} err
+ * @param {Number} result
+ * @global
+ */
+
+/**
+ * @callback HashCallback
+ * @param {Error?} err
+ * @param {Hash} hash
+ * @global
+ */
+
+/**
+ * @callback HashesCallback
+ * @param {Error?} err
+ * @param {Hash[]} hash
+ * @global
+ */
+
+/**
+ * @callback WalletCallback
+ * @param {Error?} err
+ * @param {Wallet|NakedWallet} wallet
+ * @global
+ */
+
+/**
+ * @callback BufferCallback
+ * @param {Error?} err
+ * @param {Buffer} data
+ * @global
+ */
+
+/**
+ * @callback ObjectCallback
+ * @param {Error?} err
+ * @param {Object} obj
+ * @global
+ */
+
+/**
+ * @callback DeploymentCallback
+ * @param {(Error|VerifyError)?} err
+ * @param {DeploymentState} state
+ * @global
+ */
+
+/**
+ * @callback MinerBlockCallback
+ * @param {Error?} err
+ * @param {MinerBlock} block
+ * @global
+ */
+
+/**
+ * @callback AddressMapCallback
+ * @param {Error?} err
+ * @param {AddressMap} map
+ * @global
+ */
+
+/**
+ * @callback AddressTableCallback
+ * @param {Error?} err
+ * @param {AddressTable} table
+ * @global
+ */
+
+/**
+ * @callback OrphanCallback
+ * @param {Error?} err
+ * @param {Orphan} orphan
+ * @global
+ */
+
+/**
+ * @callback TSHeightCallback
+ * @param {Error?} err
+ * @param {Number} ts
+ * @param {Number} height
+ * @global
+ */
+
+/**
+ * @callback ConfidenceCallback
+ * @param {Error?} err
+ * @param {Confidence} confidence
+ * @global
+ */
+
+/**
+ * @callback HashHeightCallback
+ * @param {Error?} err
+ * @param {Hash} hash
+ * @param {Number} height
+ * @global
  */