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Add note on borrowed code used for transaction decoding

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natsoni 2024-11-28 12:07:05 +01:00
parent 025b0585b4
commit 722eaa3e96
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1 changed files with 9 additions and 0 deletions
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9
frontend/src/app/shared/transaction.utils.ts
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@ -590,6 +590,8 @@ export function identifyPrioritizedTransactions(transactions: TransactionStrippe
return { prioritized, deprioritized };
}
// Adapted from mempool backend https://github.com/mempool/mempool/blob/14e49126c3ca8416a8d7ad134a95c5e090324d69/backend/src/api/transaction-utils.ts#L254
// Converts hex bitcoin script to ASM
function convertScriptSigAsm(hex: string): string {
const buf = new Uint8Array(hex.length / 2);
@ -655,6 +657,7 @@ function convertScriptSigAsm(hex: string): string {
return b.join(' ');
}
// Copied from mempool backend https://github.com/mempool/mempool/blob/14e49126c3ca8416a8d7ad134a95c5e090324d69/backend/src/api/transaction-utils.ts#L327
/**
* This function must only be called when we know the witness we are parsing
* is a taproot witness.
@ -679,6 +682,8 @@ function witnessToP2TRScript(witness: string[]): string | null {
return witness[positionOfScript];
}
// Copied from mempool backend https://github.com/mempool/mempool/blob/14e49126c3ca8416a8d7ad134a95c5e090324d69/backend/src/api/transaction-utils.ts#L227
// Fills inner_redeemscript_asm and inner_witnessscript_asm fields of fetched prevouts for decoded transactions
export function addInnerScriptsToVin(vin: Vin): void {
if (!vin.prevout) {
return;
@ -706,6 +711,8 @@ export function addInnerScriptsToVin(vin: Vin): void {
}
}
// Adapted from bitcoinjs-lib at https://github.com/bitcoinjs/bitcoinjs-lib/blob/32e08aa57f6a023e995d8c4f0c9fbdc5f11d1fa0/ts_src/transaction.ts#L78
// Reads buffer of raw transaction data
function fromBuffer(buffer: Uint8Array, network: string): Transaction {
let offset = 0;
@ -910,6 +917,7 @@ function txid(tx: Transaction): string {
return uint8ArrayToHexString(hash2.reverse());
}
// Copied from mempool backend https://github.com/mempool/mempool/blob/14e49126c3ca8416a8d7ad134a95c5e090324d69/backend/src/api/transaction-utils.ts#L177
export function countSigops(transaction: Transaction): number {
let sigops = 0;
@ -1213,6 +1221,7 @@ function varIntToBytes(value: number | bigint): number[] {
return bytes;
}
// Inversed the opcodes object from https://github.com/mempool/mempool/blob/14e49126c3ca8416a8d7ad134a95c5e090324d69/backend/src/utils/bitcoin-script.ts#L1
const opcodes = {
0: 'OP_0',
76: 'OP_PUSHDATA1',