RanchiMall/fcoin
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implement coin spent field.

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This commit is contained in:
Christopher Jeffrey 2016-07-02 17:20:46 -07:00
parent 6ce27b82f3
commit 5cb23020ff
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GPG Key ID: 8962AB9DE6666BBD
1 changed files with 28 additions and 12 deletions
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lib/bcoin/coins.js
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@ -177,9 +177,9 @@ Coins.prototype.getLength = function getLength() {
* Coins serialization:
* version: varint
* bits: varint ((height << 1) | coinbase-flag)
* spent-field: varint size | bitmap (0=unspent, 1=spent)
* outputs (repeated):
* prefix: 0xff = spent
* 0x00 = varint size | raw script
* prefix: 0x00 = varint size | raw script
* 0x01 = 20 byte pubkey hash
* 0x02 = 20 byte script hash
* 0x03 = 33 byte compressed key
@ -197,7 +197,7 @@ Coins.prototype.toRaw = function toRaw(writer) {
var p = new BufferWriter(writer);
var height = this.height;
var length = this.getLength();
var i, output, prefix, data, bits;
var i, output, prefix, data, bits, field, pos, bit, oct;
// Unfortunately, we don't have a compact
// way to store unconfirmed height.
@ -215,13 +215,25 @@ Coins.prototype.toRaw = function toRaw(writer) {
p.writeVarint(this.version);
p.writeVarint(bits);
field = new Buffer(Math.ceil(length / 8));
field.fill(0);
pos = 0;
for (i = 0; i < length; i++) {
output = this.outputs[i] ? 0 : 1;
bit = pos % 8;
oct = (pos - bit) / 8;
field[oct] |= output << (7 - bit);
pos++;
}
p.writeVarBytes(field);
for (i = 0; i < length; i++) {
output = this.outputs[i];
if (!output) {
p.writeU8(0xff);
if (!output)
continue;
}
if (output instanceof CompressedCoin) {
p.writeBytes(output.toRaw());
@ -280,7 +292,7 @@ Coins.prototype.toRaw = function toRaw(writer) {
Coins.prototype.fromRaw = function fromRaw(data, hash, index) {
var p = new BufferReader(data);
var i = 0;
var bits, coin, prefix, offset, size;
var bits, coin, prefix, offset, size, field, bit, oct, spent;
this.version = p.readVarint();
@ -293,14 +305,15 @@ Coins.prototype.fromRaw = function fromRaw(data, hash, index) {
if (this.height === 0x7fffffff)
this.height = -1;
field = p.readVarBytes(true);
while (p.left()) {
offset = p.start();
prefix = p.readU8();
bit = i % 8;
oct = (i - bit) / 8;
spent = (field[oct] >>> (7 - bit)) & 1;
// Already spent.
if (prefix === 0xff) {
p.end();
if (spent) {
// Don't bother pushing outputs on if
// we're seeking to a specific index.
if (index != null) {
@ -315,6 +328,9 @@ Coins.prototype.fromRaw = function fromRaw(data, hash, index) {
continue;
}
offset = p.start();
prefix = p.readU8();
// Skip past the compressed scripts.
switch (prefix & 3) {
case 0: