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block height script

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This commit is contained in:
Ben Wilson 2023-06-30 11:36:31 -04:00
parent f19063ac0c
commit 057fbe785f
1 changed files with 7 additions and 5 deletions
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12
src/models/MiningJob.ts
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@ -32,13 +32,17 @@ export class MiningJob {
this.block.transactions = blockTemplate.transactions.map(t => bitcoinjs.Transaction.fromHex(t.data));
const coinbaseTransaction = this.createCoinbaseTransaction(payoutInformation, this.blockTemplate.height, this.blockTemplate.coinbasevalue);
const coinbaseTransaction = this.createCoinbaseTransaction(payoutInformation, this.blockTemplate.coinbasevalue);
this.block.transactions.unshift(coinbaseTransaction);
this.block.witnessCommit = bitcoinjs.Block.calculateMerkleRoot(this.block.transactions, true);
this.block.merkleRoot = bitcoinjs.Block.calculateMerkleRoot(this.block.transactions, false);
// https://github.com/bitcoin/bips/blob/master/bip-0034.mediawiki
const blockHeightScript = Buffer.from(`03${this.blockTemplate.height.toString(16).padStart(8, '0')}`, 'hex');
//The commitment is recorded in a scriptPubKey of the coinbase transaction. It must be at least 38 bytes, with the first 6-byte of 0x6a24aa21a9ed, that is:
// 1-byte - OP_RETURN (0x6a)
// 1-byte - Push the following 36 bytes (0x24)
@ -47,7 +51,7 @@ export class MiningJob {
// 32-byte - Commitment hash: Double-SHA256(witness root hash|witness reserved value)
const commitmentHash = this.sha256(this.sha256(this.block.witnessCommit));
// 39th byte onwards: Optional data with no consensus meaning
coinbaseTransaction.ins[0].script = bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.concat([segwitMagicBits, commitmentHash, Buffer.from('00000000' + '00000000', 'hex')])]);
coinbaseTransaction.ins[0].script = bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.concat([blockHeightScript, segwitMagicBits, commitmentHash, Buffer.from('00000000' + '00000000', 'hex')])]);
// get the non-witness coinbase tx
//@ts-ignore
@ -55,7 +59,6 @@ export class MiningJob {
const inputScript = coinbaseTransaction.ins[0].script.toString('hex');
const partOneIndex = serializedCoinbaseTx.indexOf(inputScript) + inputScript.length;
const coinbasePart1 = serializedCoinbaseTx.slice(0, partOneIndex);
@ -119,7 +122,7 @@ export class MiningJob {
}
private createCoinbaseTransaction(addresses: AddressObject[], blockHeight: number, reward: number): bitcoinjs.Transaction {
private createCoinbaseTransaction(addresses: AddressObject[], reward: number): bitcoinjs.Transaction {
// Part 1
const coinbaseTransaction = new bitcoinjs.Transaction();
@ -127,7 +130,6 @@ export class MiningJob {
coinbaseTransaction.version = 2;
// const inputScript = bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.from('00000000' + '00000000', 'hex')])
// Add the coinbase input (input with no previous output)
coinbaseTransaction.addInput(Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex'), 0xffffffff, 0xffffffff);