@vbyte/btc-dev/dist/lib/tx/parse.js

Batteries-included toolset for plebian bitcoin development

import { Assert } from '@vbyte/micro-lib/assert';
import { decode_tx } from './decode.js';
import { assert_tx_template } from './validate.js';
import { create_tx, create_tx_output } from './create.js';
export function parse_tx(txdata, prevouts) {
    let tx;
    if (typeof txdata === 'string' || txdata instanceof Uint8Array) {
        tx = decode_tx(txdata);
    }
    else {
        assert_tx_template(txdata);
        tx = create_tx(txdata);
    }
    if (prevouts) {
        Assert.has_items(prevouts, 'prevouts must be a non-empty array');
        for (const [idx, vin] of tx.vin.entries()) {
            const prevout = prevouts.at(idx);
            Assert.exists(prevout, 'prevout not found for input index: ' + idx);
            vin.prevout = create_tx_output(prevout);
        }
    }
    return tx;
}
export function serialize_tx(txdata) {
    const tx = parse_tx(txdata);
    const version = tx.version;
    const locktime = tx.locktime;
    const vin = [];
    const vout = [];
    for (const e of tx.vin) {
        if (e.prevout !== null) {
            vin.push({
                script_pk: e.prevout.script_pk,
                value: Number(e.prevout.value)
            });
        }
    }
    for (const e of tx.vout) {
        vout.push({
            script_pk: e.script_pk,
            value: Number(e.value)
        });
    }
    return { version, locktime, vin, vout };
}