@ledgerhq/hw-app-btc/lib/getTrustedInputBIP143.js

Ledger Hardware Wallet Bitcoin Application API

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getTrustedInputBIP143 = void 0;
const sha_js_1 = __importDefault(require("sha.js"));
const serializeTransaction_1 = require("./serializeTransaction");
function getTrustedInputBIP143(transport, indexLookup, transaction, additionals = []) {
    if (!transaction) {
        throw new Error("getTrustedInputBIP143: missing tx");
    }
    const isDecred = additionals.includes("decred");
    if (isDecred) {
        throw new Error("Decred does not implement BIP143");
    }
    let hash = (0, sha_js_1.default)("sha256")
        .update((0, sha_js_1.default)("sha256").update((0, serializeTransaction_1.serializeTransaction)(transaction, true)).digest())
        .digest();
    const data = Buffer.alloc(4);
    data.writeUInt32LE(indexLookup, 0);
    const { outputs, locktime } = transaction;
    if (!outputs || !locktime) {
        throw new Error("getTrustedInputBIP143: locktime & outputs is expected");
    }
    if (!outputs[indexLookup]) {
        throw new Error("getTrustedInputBIP143: wrong index");
    }
    hash = Buffer.concat([hash, data, outputs[indexLookup].amount]);
    return hash.toString("hex");
}
exports.getTrustedInputBIP143 = getTrustedInputBIP143;
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