@ledgerhq/hw-app-btc
Version:
Ledger Hardware Wallet Bitcoin Application API
103 lines • 4.54 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getTrustedInput = exports.getTrustedInputRaw = void 0;
const invariant_1 = __importDefault(require("invariant"));
const constants_1 = require("./constants");
const varint_1 = require("./varint");
async function getTrustedInputRaw(transport, transactionData, indexLookup) {
let data;
let firstRound = false;
if (typeof indexLookup === "number") {
firstRound = true;
const prefix = Buffer.alloc(4);
prefix.writeUInt32BE(indexLookup, 0);
data = Buffer.concat([prefix, transactionData], transactionData.length + 4);
}
else {
data = transactionData;
}
const trustedInput = await transport.send(0xe0, 0x42, firstRound ? 0x00 : 0x80, 0x00, data);
const res = trustedInput.slice(0, trustedInput.length - 2).toString("hex");
return res;
}
exports.getTrustedInputRaw = getTrustedInputRaw;
async function getTrustedInput(transport, indexLookup, transaction, additionals = []) {
const { inputs, outputs, locktime, nExpiryHeight, extraData } = transaction;
if (!outputs || !locktime) {
throw new Error("getTrustedInput: locktime & outputs is expected");
}
const isDecred = additionals.includes("decred");
const processScriptBlocks = async (script, sequence) => {
const seq = sequence || Buffer.alloc(0);
const scriptBlocks = [];
let offset = 0;
while (offset !== script.length) {
const blockSize = script.length - offset > constants_1.MAX_SCRIPT_BLOCK ? constants_1.MAX_SCRIPT_BLOCK : script.length - offset;
if (offset + blockSize !== script.length) {
scriptBlocks.push(script.slice(offset, offset + blockSize));
}
else {
scriptBlocks.push(Buffer.concat([script.slice(offset, offset + blockSize), seq]));
}
offset += blockSize;
}
// Handle case when no script length: we still want to pass the sequence
// relatable: https://github.com/LedgerHQ/ledger-live-desktop/issues/1386
if (script.length === 0) {
scriptBlocks.push(seq);
}
let res;
for (const scriptBlock of scriptBlocks) {
res = await getTrustedInputRaw(transport, scriptBlock);
}
return res;
};
const processWholeScriptBlock = block => getTrustedInputRaw(transport, block);
await getTrustedInputRaw(transport, Buffer.concat([
transaction.version,
transaction.timestamp || Buffer.alloc(0),
transaction.nVersionGroupId || Buffer.alloc(0),
(0, varint_1.createVarint)(inputs.length),
]), indexLookup);
for (const input of inputs) {
const treeField = isDecred ? input.tree || Buffer.from([0x00]) : Buffer.alloc(0);
const data = Buffer.concat([input.prevout, treeField, (0, varint_1.createVarint)(input.script.length)]);
await getTrustedInputRaw(transport, data);
// iteration (eachSeries) ended
// TODO notify progress
// deferred.notify("input");
await (isDecred
? processWholeScriptBlock(Buffer.concat([input.script, input.sequence]))
: processScriptBlocks(input.script, input.sequence));
}
await getTrustedInputRaw(transport, (0, varint_1.createVarint)(outputs.length));
for (const output of outputs) {
const data = Buffer.concat([
output.amount,
isDecred ? Buffer.from([0x00, 0x00]) : Buffer.alloc(0), //Version script
(0, varint_1.createVarint)(output.script.length),
output.script,
]);
await getTrustedInputRaw(transport, data);
}
const endData = [];
if (nExpiryHeight && nExpiryHeight.length > 0) {
endData.push(nExpiryHeight);
}
if (extraData && extraData.length > 0) {
endData.push(extraData);
}
let extraPart;
if (endData.length) {
const data = Buffer.concat(endData);
extraPart = isDecred ? data : Buffer.concat([(0, varint_1.createVarint)(data.length), data]);
}
const res = await processScriptBlocks(Buffer.concat([locktime, extraPart || Buffer.alloc(0)]));
(0, invariant_1.default)(res, "missing result in processScriptBlocks");
return res;
}
exports.getTrustedInput = getTrustedInput;
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