@ledgerhq/hw-app-btc/lib/signTransaction.js

Ledger Hardware Wallet Bitcoin Application API

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.signTransaction = signTransaction;
const bip32_1 = require("./bip32");
function signTransaction(transport, path, lockTime, sigHashType, expiryHeight, additionals = []) {
    const isDecred = additionals.includes("decred");
    const pathsBuffer = (0, bip32_1.bip32asBuffer)(path);
    const lockTimeBuffer = Buffer.alloc(4);
    lockTimeBuffer.writeUInt32BE(lockTime, 0);
    let buffer = isDecred
        ? Buffer.concat([
            pathsBuffer,
            lockTimeBuffer,
            expiryHeight || Buffer.from([0x00, 0x00, 0x00, 0x00]),
            Buffer.from([sigHashType]),
        ])
        : Buffer.concat([pathsBuffer, Buffer.from([0x00]), lockTimeBuffer, Buffer.from([sigHashType])]);
    if (expiryHeight && !isDecred) {
        buffer = Buffer.concat([buffer, expiryHeight]);
    }
    return transport.send(0xe0, 0x48, 0x00, 0x00, buffer).then(result => {
        if (result.length > 0) {
            result[0] = 0x30;
            return result.slice(0, result.length - 2);
        }
        return result;
    });
}
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