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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/@bitgo/abstract-utxo/dist/src/recovery
Просмотр файла: backupKeyRecovery.js
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.backupKeyRecovery = backupKeyRecovery;
exports.v1BackupKeyRecovery = v1BackupKeyRecovery;
exports.v1Sweep = v1Sweep;
const assert_1 = __importDefault(require("assert"));
const lodash_1 = __importDefault(require("lodash"));
const utxolib = __importStar(require("@bitgo/utxo-lib"));
const unspents_1 = require("@bitgo/unspents");
const sdk_core_1 = require("@bitgo/sdk-core");
const utxo_lib_1 = require("@bitgo/utxo-lib");
const sign_1 = require("../sign");
const RecoveryProvider_1 = require("./RecoveryProvider");
const mempoolApi_1 = require("./mempoolApi");
const coingeckoApi_1 = require("./coingeckoApi");
const { getInternalChainCode, scriptTypeForChain, outputScripts, getExternalChainCode } = utxolib.bitgo;
/**
* This transforms the txInfo from recover into the format that offline-signing-tool expects
* @param coinName
* @param txInfo
* @param txHex
* @returns {{txHex: *, txInfo: {unspents: *}, feeInfo: {}, coin: void}}
*/
function formatForOfflineVault(coinName, txInfo, txHex) {
return {
txHex,
txInfo: {
unspents: txInfo.inputs.map((input) => {
(0, assert_1.default)(input.valueString);
return { ...input, valueString: input.valueString };
}),
},
feeInfo: {},
coin: coinName,
};
}
/**
* Get the current market price from a third party to be used for recovery
* This function is only intended for non-bitgo recovery transactions, when it is necessary
* to calculate the rough fee needed to pay to Keyternal. We are okay with approximating,
* because the resulting price of this function only has less than 1 dollar influence on the
* fee that needs to be paid to Keyternal.
*
* See calculateFeeAmount function: return Math.round(feeAmountUsd / currentPrice * self.getBaseFactor());
*
* This end function should not be used as an accurate endpoint, since some coins' prices are missing from the provider
*/
async function getRecoveryMarketPrice(coin) {
return await new coingeckoApi_1.CoingeckoApi().getUSDPrice(coin.getFamily());
}
/**
* Calculates the amount (in base units) to pay a KRS provider when building a recovery transaction
* @param coin
* @param params
* @param params.provider {String} the KRS provider that holds the backup key
* @returns {*}
*/
async function calculateFeeAmount(coin, params) {
const krsProvider = sdk_core_1.krsProviders[params.provider];
if (krsProvider === undefined) {
throw new Error(`no fee structure specified for provider ${params.provider}`);
}
if (krsProvider.feeType === 'flatUsd') {
const feeAmountUsd = krsProvider.feeAmount;
const currentPrice = await getRecoveryMarketPrice(coin);
return Math.round((feeAmountUsd / currentPrice) * coin.getBaseFactor());
}
else {
// we can add more fee structures here as needed for different providers, such as percentage of recovery amount
throw new Error('Fee structure not implemented');
}
}
function getFormattedAddress(coin, address) {
// Blockchair uses cashaddr format when querying the API for address information. Convert legacy addresses to cashaddr
// before querying the API.
return coin.getChain() === 'bch' || coin.getChain() === 'bcha'
? coin.canonicalAddress(address.address, 'cashaddr').split(':')[1]
: address.address;
}
async function queryBlockchainUnspentsPath(coin, params, walletKeys, chain) {
const scriptType = scriptTypeForChain(chain);
const fetchPrevTx = !utxolib.bitgo.outputScripts.hasWitnessData(scriptType) && (0, utxo_lib_1.getMainnet)(coin.network) !== utxo_lib_1.networks.zcash;
const recoveryProvider = params.recoveryProvider ?? (0, RecoveryProvider_1.forCoin)(coin.getChain(), params.apiKey);
const MAX_SEQUENTIAL_ADDRESSES_WITHOUT_TXS = params.scan || 20;
let numSequentialAddressesWithoutTxs = 0;
const prevTxCache = new Map();
async function getPrevTx(txid) {
let prevTxHex = prevTxCache.get(txid);
if (!prevTxHex) {
prevTxHex = await recoveryProvider.getTransactionHex(txid);
prevTxCache.set(txid, prevTxHex);
}
return prevTxHex;
}
async function gatherUnspents(addrIndex) {
const walletKeysForUnspent = walletKeys.deriveForChainAndIndex(chain, addrIndex);
const address = coin.createMultiSigAddress(scriptType, 2, walletKeysForUnspent.publicKeys);
const formattedAddress = getFormattedAddress(coin, address);
const addrInfo = await recoveryProvider.getAddressInfo(formattedAddress);
// we use txCount here because it implies usage - having tx'es means the addr was generated and used
if (addrInfo.txCount === 0) {
numSequentialAddressesWithoutTxs++;
}
else {
numSequentialAddressesWithoutTxs = 0;
if (addrInfo.balance > 0) {
console.log(`Found an address with balance: ${address.address} with balance ${addrInfo.balance}`);
const addressUnspents = await recoveryProvider.getUnspentsForAddresses([formattedAddress]);
const processedUnspents = await Promise.all(addressUnspents.map(async (u) => {
const { txid, vout } = utxolib.bitgo.parseOutputId(u.id);
let val = BigInt(u.value);
if (coin.amountType === 'bigint') {
// blockchair returns the number with the correct precision, but in number format
// json parse won't parse it correctly, so we requery the txid for the tx hex to decode here
if (!Number.isSafeInteger(u.value)) {
const txHex = await getPrevTx(txid);
const tx = coin.createTransactionFromHex(txHex);
val = tx.outs[vout].value;
}
}
// the api may return cashaddr's instead of legacy for BCH and BCHA
// downstream processes's only expect legacy addresses
u = { ...u, address: coin.canonicalAddress(u.address) };
return {
...u,
value: val,
chain: chain,
index: addrIndex,
prevTx: fetchPrevTx ? Buffer.from(await getPrevTx(txid), 'hex') : undefined,
};
}));
walletUnspents.push(...processedUnspents);
}
}
if (numSequentialAddressesWithoutTxs >= MAX_SEQUENTIAL_ADDRESSES_WITHOUT_TXS) {
// stop searching for addresses with unspents in them, we've found ${MAX_SEQUENTIAL_ADDRESSES_WITHOUT_TXS} in a row with none
// we are done
return;
}
return gatherUnspents(addrIndex + 1);
}
// get unspents for these addresses
const walletUnspents = [];
// This will populate walletAddresses
await gatherUnspents(0);
if (walletUnspents.length === 0) {
// Couldn't find any addresses with funds
return [];
}
return walletUnspents;
}
async function getRecoveryFeePerBytes(coin, { defaultValue }) {
try {
return await mempoolApi_1.MempoolApi.forCoin(coin.getChain()).getRecoveryFeePerBytes();
}
catch (e) {
console.dir(e);
return defaultValue;
}
}
/**
* Builds a funds recovery transaction without BitGo.
*
* Returns transaction hex in legacy format for unsigned sweep transaction, half signed backup recovery transaction with KRS provider (only keyternal),
* fully signed backup recovery transaction without a KRS provider.
*
* Returns PSBT hex for half signed backup recovery transaction with KRS provider (excluding keyternal)
* For PSBT hex cases, Unspents are not required in response.
*
* @param coin
* @param bitgo
* @param params
* - userKey: [encrypted] xprv, or xpub
* - backupKey: [encrypted] xprv, or xpub if the xprv is held by a KRS provider
* - walletPassphrase: necessary if one of the xprvs is encrypted
* - bitgoKey: xpub
* - krsProvider: necessary if backup key is held by KRS
* - recoveryDestination: target address to send recovered funds to
* - scan: the amount of consecutive addresses without unspents to scan through before stopping
* - ignoreAddressTypes: (optional) scripts to ignore
* for example: ['p2shP2wsh', 'p2wsh'] will prevent code from checking for wrapped-segwit and native-segwit chains on the public block explorers
*/
async function backupKeyRecovery(coin, bitgo, params) {
if (lodash_1.default.isUndefined(params.userKey)) {
throw new Error('missing userKey');
}
if (lodash_1.default.isUndefined(params.backupKey)) {
throw new Error('missing backupKey');
}
if (lodash_1.default.isUndefined(params.recoveryDestination) ||
!coin.isValidAddress(params.recoveryDestination, { anyFormat: true })) {
throw new Error('invalid recoveryDestination');
}
if (!lodash_1.default.isUndefined(params.scan) && (!lodash_1.default.isInteger(params.scan) || params.scan < 0)) {
throw new Error('scan must be a positive integer');
}
if (params.feeRate !== undefined && (!Number.isFinite(params.feeRate) || params.feeRate <= 0)) {
throw new Error('feeRate must be a positive number');
}
const isKrsRecovery = (0, sdk_core_1.getIsKrsRecovery)(params);
const isUnsignedSweep = (0, sdk_core_1.getIsUnsignedSweep)(params);
const responseTxFormat = isUnsignedSweep || !isKrsRecovery || params.krsProvider === 'keyternal' ? 'legacy' : 'psbt';
const krsProvider = isKrsRecovery ? (0, sdk_core_1.getKrsProvider)(coin, params.krsProvider) : undefined;
// check whether key material and password authenticate the users and return parent keys of all three keys of the wallet
const keys = (0, sdk_core_1.getBip32Keys)(bitgo, params, { requireBitGoXpub: true });
if (!(0, sdk_core_1.isTriple)(keys)) {
throw new Error(`expected key triple`);
}
const walletKeys = new utxolib.bitgo.RootWalletKeys(keys, [
params.userKeyPath || utxolib.bitgo.RootWalletKeys.defaultPrefix,
utxolib.bitgo.RootWalletKeys.defaultPrefix,
utxolib.bitgo.RootWalletKeys.defaultPrefix,
]);
const unspents = (await Promise.all(outputScripts.scriptTypes2Of3
.filter((addressType) => coin.supportsAddressType(addressType) && !params.ignoreAddressTypes?.includes(addressType))
.reduce((queries, addressType) => [
...queries,
queryBlockchainUnspentsPath(coin, params, walletKeys, getExternalChainCode(addressType)),
queryBlockchainUnspentsPath(coin, params, walletKeys, getInternalChainCode(addressType)),
], []))).flat();
// Execute the queries and gather the unspents
const totalInputAmount = utxolib.bitgo.unspentSum(unspents, 'bigint');
if (totalInputAmount <= BigInt(0)) {
throw new sdk_core_1.ErrorNoInputToRecover();
}
// Build the psbt
const psbt = utxolib.bitgo.createPsbtForNetwork({ network: coin.network });
// xpubs can become handy for many things.
utxolib.bitgo.addXpubsToPsbt(psbt, walletKeys);
const txInfo = {};
const feePerByte = params.feeRate !== undefined ? params.feeRate : await getRecoveryFeePerBytes(coin, { defaultValue: 50 });
// KRS recovery transactions have a 2nd output to pay the recovery fee, like paygo fees.
const dimensions = unspents_1.Dimensions.fromPsbt(psbt).plus(isKrsRecovery ? unspents_1.Dimensions.SingleOutput.p2wsh : unspents_1.Dimensions.ZERO);
const approximateFee = BigInt(dimensions.getVSize() * feePerByte);
txInfo.inputs =
responseTxFormat === 'legacy'
? unspents.map((u) => ({ ...u, value: Number(u.value), valueString: u.value.toString(), prevTx: undefined }))
: undefined;
unspents.forEach((unspent) => {
utxolib.bitgo.addWalletUnspentToPsbt(psbt, unspent, walletKeys, 'user', 'backup');
});
let krsFee = BigInt(0);
if (isKrsRecovery && params.krsProvider) {
try {
krsFee = BigInt(await calculateFeeAmount(coin, { provider: params.krsProvider }));
}
catch (err) {
// Don't let this error block the recovery -
console.dir(err);
}
}
const recoveryAmount = totalInputAmount - approximateFee - krsFee;
if (recoveryAmount < BigInt(0)) {
throw new Error(`this wallet\'s balance is too low to pay the fees specified by the KRS provider.
Existing balance on wallet: ${totalInputAmount.toString()}. Estimated network fee for the recovery transaction
: ${approximateFee.toString()}, KRS fee to pay: ${krsFee.toString()}. After deducting fees, your total
recoverable balance is ${recoveryAmount.toString()}`);
}
const recoveryOutputScript = utxolib.address.toOutputScript(params.recoveryDestination, coin.network);
psbt.addOutput({ script: recoveryOutputScript, value: recoveryAmount });
if (krsProvider && krsFee > BigInt(0)) {
if (!krsProvider.feeAddresses) {
throw new Error(`keyProvider must define feeAddresses`);
}
const krsFeeAddress = krsProvider.feeAddresses[coin.getChain()];
if (!krsFeeAddress) {
throw new Error('this KRS provider has not configured their fee structure yet - recovery cannot be completed');
}
const krsFeeOutputScript = utxolib.address.toOutputScript(krsFeeAddress, coin.network);
psbt.addOutput({ script: krsFeeOutputScript, value: krsFee });
}
if (isUnsignedSweep) {
// TODO BTC-317 - When ready to PSBTify OVC, send psbt hex and skip unspents in response.
const txHex = psbt.getUnsignedTx().toBuffer().toString('hex');
return formatForOfflineVault(coin.getChain(), txInfo, txHex);
}
else {
(0, sign_1.signAndVerifyPsbt)(psbt, walletKeys.user, { isLastSignature: false });
if (isKrsRecovery) {
// The KRS provider keyternal solely supports P2SH, P2WSH, and P2SH-P2WSH input script types.
// It currently uses an outdated BitGoJS SDK, which relies on a legacy transaction builder for cosigning.
// Unfortunately, upgrading the keyternal code presents challenges,
// which hinders the integration of the latest BitGoJS SDK with PSBT signing support.
txInfo.transactionHex =
params.krsProvider === 'keyternal'
? utxolib.bitgo.extractP2msOnlyHalfSignedTx(psbt).toBuffer().toString('hex')
: psbt.toHex();
}
else {
const tx = (0, sign_1.signAndVerifyPsbt)(psbt, walletKeys.backup, { isLastSignature: true });
txInfo.transactionHex = tx.toBuffer().toString('hex');
}
}
if (isKrsRecovery) {
txInfo.coin = coin.getChain();
txInfo.backupKey = params.backupKey;
txInfo.recoveryAmount = Number(recoveryAmount);
txInfo.recoveryAmountString = recoveryAmount.toString();
}
return txInfo;
}
async function v1BackupKeyRecovery(coin, bitgo, params) {
if (lodash_1.default.isUndefined(params.recoveryDestination) ||
!coin.isValidAddress(params.recoveryDestination, { anyFormat: true })) {
throw new Error('invalid recoveryDestination');
}
const recoveryFeePerByte = await getRecoveryFeePerBytes(coin, { defaultValue: 50 });
const v1wallet = await bitgo.wallets().get({ id: params.walletId });
return await v1wallet.recover({
...params,
feeRate: recoveryFeePerByte,
});
}
async function v1Sweep(coin, bitgo, params) {
if (lodash_1.default.isUndefined(params.recoveryDestination) ||
!coin.isValidAddress(params.recoveryDestination, { anyFormat: true })) {
throw new Error('invalid recoveryDestination');
}
let recoveryFeePerByte = 100;
if (bitgo.env === 'prod') {
recoveryFeePerByte = await getRecoveryFeePerBytes(coin, { defaultValue: 100 });
}
const v1wallet = await bitgo.wallets().get({ id: params.walletId });
return await v1wallet.sweep({
...params,
feeRate: recoveryFeePerByte,
});
}
//# 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assert from 'assert';\n\nimport _ from 'lodash';\nimport * as utxolib from '@bitgo/utxo-lib';\nimport { Dimensions } from '@bitgo/unspents';\nimport {\n  BitGoBase,\n  ErrorNoInputToRecover,\n  getKrsProvider,\n  getBip32Keys,\n  getIsKrsRecovery,\n  getIsUnsignedSweep,\n  isTriple,\n  krsProviders,\n} from '@bitgo/sdk-core';\nimport { getMainnet, networks } from '@bitgo/utxo-lib';\n\nimport { AbstractUtxoCoin, MultiSigAddress } from '../abstractUtxoCoin';\nimport { signAndVerifyPsbt } from '../sign';\n\nimport { forCoin, RecoveryProvider } from './RecoveryProvider';\nimport { MempoolApi } from './mempoolApi';\nimport { CoingeckoApi } from './coingeckoApi';\n\ntype ScriptType2Of3 = utxolib.bitgo.outputScripts.ScriptType2Of3;\ntype ChainCode = utxolib.bitgo.ChainCode;\ntype RootWalletKeys = utxolib.bitgo.RootWalletKeys;\ntype WalletUnspent<TNumber extends number | bigint> = utxolib.bitgo.WalletUnspent<TNumber>;\ntype WalletUnspentJSON = utxolib.bitgo.WalletUnspent & {\n  valueString: string;\n};\n\nconst { getInternalChainCode, scriptTypeForChain, outputScripts, getExternalChainCode } = utxolib.bitgo;\n\nexport interface OfflineVaultTxInfo {\n  inputs: WalletUnspentJSON[];\n}\n\nexport interface FormattedOfflineVaultTxInfo {\n  txInfo: {\n    unspents: WalletUnspentJSON[];\n  };\n  txHex: string;\n  feeInfo: Record<string, never>;\n  coin: string;\n}\n\n/**\n * This transforms the txInfo from recover into the format that offline-signing-tool expects\n * @param coinName\n * @param txInfo\n * @param txHex\n * @returns {{txHex: *, txInfo: {unspents: *}, feeInfo: {}, coin: void}}\n */\nfunction formatForOfflineVault(\n  coinName: string,\n  txInfo: OfflineVaultTxInfo,\n  txHex: string\n): FormattedOfflineVaultTxInfo {\n  return {\n    txHex,\n    txInfo: {\n      unspents: txInfo.inputs.map((input) => {\n        assert(input.valueString);\n        return { ...input, valueString: input.valueString };\n      }),\n    },\n    feeInfo: {},\n    coin: coinName,\n  };\n}\n\n/**\n * Get the current market price from a third party to be used for recovery\n * This function is only intended for non-bitgo recovery transactions, when it is necessary\n * to calculate the rough fee needed to pay to Keyternal. We are okay with approximating,\n * because the resulting price of this function only has less than 1 dollar influence on the\n * fee that needs to be paid to Keyternal.\n *\n * See calculateFeeAmount function:  return Math.round(feeAmountUsd / currentPrice * self.getBaseFactor());\n *\n * This end function should not be used as an accurate endpoint, since some coins' prices are missing from the provider\n */\nasync function getRecoveryMarketPrice(coin: AbstractUtxoCoin): Promise<number> {\n  return await new CoingeckoApi().getUSDPrice(coin.getFamily());\n}\n\n/**\n * Calculates the amount (in base units) to pay a KRS provider when building a recovery transaction\n * @param coin\n * @param params\n * @param params.provider {String} the KRS provider that holds the backup key\n * @returns {*}\n */\nasync function calculateFeeAmount(coin: AbstractUtxoCoin, params: { provider: string }): Promise<number> {\n  const krsProvider = krsProviders[params.provider];\n\n  if (krsProvider === undefined) {\n    throw new Error(`no fee structure specified for provider ${params.provider}`);\n  }\n\n  if (krsProvider.feeType === 'flatUsd') {\n    const feeAmountUsd = krsProvider.feeAmount;\n    const currentPrice: number = await getRecoveryMarketPrice(coin);\n\n    return Math.round((feeAmountUsd / currentPrice) * coin.getBaseFactor());\n  } else {\n    // we can add more fee structures here as needed for different providers, such as percentage of recovery amount\n    throw new Error('Fee structure not implemented');\n  }\n}\n\nexport interface RecoverParams {\n  scan?: number;\n  userKey: string;\n  backupKey: string;\n  bitgoKey: string;\n  recoveryDestination: string;\n  krsProvider?: string;\n  ignoreAddressTypes: ScriptType2Of3[];\n  walletPassphrase?: string;\n  apiKey?: string;\n  userKeyPath?: string;\n  recoveryProvider?: RecoveryProvider;\n  feeRate?: number;\n}\n\nfunction getFormattedAddress(coin: AbstractUtxoCoin, address: MultiSigAddress) {\n  // Blockchair uses cashaddr format when querying the API for address information. Convert legacy addresses to cashaddr\n  // before querying the API.\n  return coin.getChain() === 'bch' || coin.getChain() === 'bcha'\n    ? coin.canonicalAddress(address.address, 'cashaddr').split(':')[1]\n    : address.address;\n}\n\nasync function queryBlockchainUnspentsPath(\n  coin: AbstractUtxoCoin,\n  params: RecoverParams,\n  walletKeys: RootWalletKeys,\n  chain: ChainCode\n): Promise<WalletUnspent<bigint>[]> {\n  const scriptType = scriptTypeForChain(chain);\n  const fetchPrevTx =\n    !utxolib.bitgo.outputScripts.hasWitnessData(scriptType) && getMainnet(coin.network) !== networks.zcash;\n  const recoveryProvider = params.recoveryProvider ?? forCoin(coin.getChain(), params.apiKey);\n  const MAX_SEQUENTIAL_ADDRESSES_WITHOUT_TXS = params.scan || 20;\n  let numSequentialAddressesWithoutTxs = 0;\n  const prevTxCache = new Map<string, string>();\n\n  async function getPrevTx(txid: string): Promise<string> {\n    let prevTxHex = prevTxCache.get(txid);\n    if (!prevTxHex) {\n      prevTxHex = await recoveryProvider.getTransactionHex(txid);\n      prevTxCache.set(txid, prevTxHex);\n    }\n    return prevTxHex;\n  }\n\n  async function gatherUnspents(addrIndex: number) {\n    const walletKeysForUnspent = walletKeys.deriveForChainAndIndex(chain, addrIndex);\n    const address = coin.createMultiSigAddress(scriptType, 2, walletKeysForUnspent.publicKeys);\n\n    const formattedAddress = getFormattedAddress(coin, address);\n    const addrInfo = await recoveryProvider.getAddressInfo(formattedAddress);\n    // we use txCount here because it implies usage - having tx'es means the addr was generated and used\n    if (addrInfo.txCount === 0) {\n      numSequentialAddressesWithoutTxs++;\n    } else {\n      numSequentialAddressesWithoutTxs = 0;\n\n      if (addrInfo.balance > 0) {\n        console.log(`Found an address with balance: ${address.address} with balance ${addrInfo.balance}`);\n        const addressUnspents = await recoveryProvider.getUnspentsForAddresses([formattedAddress]);\n        const processedUnspents = await Promise.all(\n          addressUnspents.map(async (u): Promise<WalletUnspent<bigint>> => {\n            const { txid, vout } = utxolib.bitgo.parseOutputId(u.id);\n            let val = BigInt(u.value);\n            if (coin.amountType === 'bigint') {\n              // blockchair returns the number with the correct precision, but in number format\n              // json parse won't parse it correctly, so we requery the txid for the tx hex to decode here\n              if (!Number.isSafeInteger(u.value)) {\n                const txHex = await getPrevTx(txid);\n                const tx = coin.createTransactionFromHex<bigint>(txHex);\n                val = tx.outs[vout].value;\n              }\n            }\n            // the api may return cashaddr's instead of legacy for BCH and BCHA\n            // downstream processes's only expect legacy addresses\n            u = { ...u, address: coin.canonicalAddress(u.address) };\n            return {\n              ...u,\n              value: val,\n              chain: chain,\n              index: addrIndex,\n              prevTx: fetchPrevTx ? Buffer.from(await getPrevTx(txid), 'hex') : undefined,\n            } as WalletUnspent<bigint>;\n          })\n        );\n\n        walletUnspents.push(...processedUnspents);\n      }\n    }\n\n    if (numSequentialAddressesWithoutTxs >= MAX_SEQUENTIAL_ADDRESSES_WITHOUT_TXS) {\n      // stop searching for addresses with unspents in them, we've found ${MAX_SEQUENTIAL_ADDRESSES_WITHOUT_TXS} in a row with none\n      // we are done\n      return;\n    }\n\n    return gatherUnspents(addrIndex + 1);\n  }\n\n  // get unspents for these addresses\n\n  const walletUnspents: WalletUnspent<bigint>[] = [];\n  // This will populate walletAddresses\n  await gatherUnspents(0);\n\n  if (walletUnspents.length === 0) {\n    // Couldn't find any addresses with funds\n    return [];\n  }\n\n  return walletUnspents;\n}\n\nasync function getRecoveryFeePerBytes(\n  coin: AbstractUtxoCoin,\n  { defaultValue }: { defaultValue: number }\n): Promise<number> {\n  try {\n    return await MempoolApi.forCoin(coin.getChain()).getRecoveryFeePerBytes();\n  } catch (e) {\n    console.dir(e);\n    return defaultValue;\n  }\n}\n\nexport type BackupKeyRecoveryTransansaction = {\n  inputs?: WalletUnspentJSON[];\n  transactionHex: string;\n  coin: string;\n  backupKey: string;\n  recoveryAmount: number;\n  recoveryAmountString: string;\n};\n\n/**\n * Builds a funds recovery transaction without BitGo.\n *\n * Returns transaction hex in legacy format for unsigned sweep transaction, half signed backup recovery transaction with KRS provider (only keyternal),\n * fully signed backup recovery transaction without a KRS provider.\n *\n * Returns PSBT hex for half signed backup recovery transaction with KRS provider (excluding keyternal)\n * For PSBT hex cases, Unspents are not required in response.\n *\n * @param coin\n * @param bitgo\n * @param params\n * - userKey: [encrypted] xprv, or xpub\n * - backupKey: [encrypted] xprv, or xpub if the xprv is held by a KRS provider\n * - walletPassphrase: necessary if one of the xprvs is encrypted\n * - bitgoKey: xpub\n * - krsProvider: necessary if backup key is held by KRS\n * - recoveryDestination: target address to send recovered funds to\n * - scan: the amount of consecutive addresses without unspents to scan through before stopping\n * - ignoreAddressTypes: (optional) scripts to ignore\n *        for example: ['p2shP2wsh', 'p2wsh'] will prevent code from checking for wrapped-segwit and native-segwit chains on the public block explorers\n */\nexport async function backupKeyRecovery(\n  coin: AbstractUtxoCoin,\n  bitgo: BitGoBase,\n  params: RecoverParams\n): Promise<BackupKeyRecoveryTransansaction | FormattedOfflineVaultTxInfo> {\n  if (_.isUndefined(params.userKey)) {\n    throw new Error('missing userKey');\n  }\n\n  if (_.isUndefined(params.backupKey)) {\n    throw new Error('missing backupKey');\n  }\n\n  if (\n    _.isUndefined(params.recoveryDestination) ||\n    !coin.isValidAddress(params.recoveryDestination, { anyFormat: true })\n  ) {\n    throw new Error('invalid recoveryDestination');\n  }\n\n  if (!_.isUndefined(params.scan) && (!_.isInteger(params.scan) || params.scan < 0)) {\n    throw new Error('scan must be a positive integer');\n  }\n\n  if (params.feeRate !== undefined && (!Number.isFinite(params.feeRate) || params.feeRate <= 0)) {\n    throw new Error('feeRate must be a positive number');\n  }\n\n  const isKrsRecovery = getIsKrsRecovery(params);\n  const isUnsignedSweep = getIsUnsignedSweep(params);\n  const responseTxFormat = isUnsignedSweep || !isKrsRecovery || params.krsProvider === 'keyternal' ? 'legacy' : 'psbt';\n\n  const krsProvider = isKrsRecovery ? getKrsProvider(coin, params.krsProvider) : undefined;\n\n  // check whether key material and password authenticate the users and return parent keys of all three keys of the wallet\n  const keys = getBip32Keys(bitgo, params, { requireBitGoXpub: true });\n  if (!isTriple(keys)) {\n    throw new Error(`expected key triple`);\n  }\n  const walletKeys = new utxolib.bitgo.RootWalletKeys(keys, [\n    params.userKeyPath || utxolib.bitgo.RootWalletKeys.defaultPrefix,\n    utxolib.bitgo.RootWalletKeys.defaultPrefix,\n    utxolib.bitgo.RootWalletKeys.defaultPrefix,\n  ]);\n\n  const unspents: WalletUnspent<bigint>[] = (\n    await Promise.all(\n      outputScripts.scriptTypes2Of3\n        .filter(\n          (addressType) => coin.supportsAddressType(addressType) && !params.ignoreAddressTypes?.includes(addressType)\n        )\n        .reduce(\n          (queries, addressType) => [\n            ...queries,\n            queryBlockchainUnspentsPath(coin, params, walletKeys, getExternalChainCode(addressType)),\n            queryBlockchainUnspentsPath(coin, params, walletKeys, getInternalChainCode(addressType)),\n          ],\n          [] as Promise<WalletUnspent<bigint>[]>[]\n        )\n    )\n  ).flat();\n\n  // Execute the queries and gather the unspents\n  const totalInputAmount = utxolib.bitgo.unspentSum(unspents, 'bigint');\n  if (totalInputAmount <= BigInt(0)) {\n    throw new ErrorNoInputToRecover();\n  }\n\n  // Build the psbt\n  const psbt = utxolib.bitgo.createPsbtForNetwork({ network: coin.network });\n  // xpubs can become handy for many things.\n  utxolib.bitgo.addXpubsToPsbt(psbt, walletKeys);\n  const txInfo = {} as BackupKeyRecoveryTransansaction;\n  const feePerByte: number =\n    params.feeRate !== undefined ? params.feeRate : await getRecoveryFeePerBytes(coin, { defaultValue: 50 });\n\n  // KRS recovery transactions have a 2nd output to pay the recovery fee, like paygo fees.\n  const dimensions = Dimensions.fromPsbt(psbt).plus(isKrsRecovery ? Dimensions.SingleOutput.p2wsh : Dimensions.ZERO);\n  const approximateFee = BigInt(dimensions.getVSize() * feePerByte);\n\n  txInfo.inputs =\n    responseTxFormat === 'legacy'\n      ? unspents.map((u) => ({ ...u, value: Number(u.value), valueString: u.value.toString(), prevTx: undefined }))\n      : undefined;\n\n  unspents.forEach((unspent) => {\n    utxolib.bitgo.addWalletUnspentToPsbt(psbt, unspent, walletKeys, 'user', 'backup');\n  });\n\n  let krsFee = BigInt(0);\n  if (isKrsRecovery && params.krsProvider) {\n    try {\n      krsFee = BigInt(await calculateFeeAmount(coin, { provider: params.krsProvider }));\n    } catch (err) {\n      // Don't let this error block the recovery -\n      console.dir(err);\n    }\n  }\n\n  const recoveryAmount = totalInputAmount - approximateFee - krsFee;\n\n  if (recoveryAmount < BigInt(0)) {\n    throw new Error(`this wallet\\'s balance is too low to pay the fees specified by the KRS provider. \n          Existing balance on wallet: ${totalInputAmount.toString()}. Estimated network fee for the recovery transaction\n          : ${approximateFee.toString()}, KRS fee to pay: ${krsFee.toString()}. After deducting fees, your total \n          recoverable balance is ${recoveryAmount.toString()}`);\n  }\n\n  const recoveryOutputScript = utxolib.address.toOutputScript(params.recoveryDestination, coin.network);\n  psbt.addOutput({ script: recoveryOutputScript, value: recoveryAmount });\n\n  if (krsProvider && krsFee > BigInt(0)) {\n    if (!krsProvider.feeAddresses) {\n      throw new Error(`keyProvider must define feeAddresses`);\n    }\n\n    const krsFeeAddress = krsProvider.feeAddresses[coin.getChain()];\n\n    if (!krsFeeAddress) {\n      throw new Error('this KRS provider has not configured their fee structure yet - recovery cannot be completed');\n    }\n\n    const krsFeeOutputScript = utxolib.address.toOutputScript(krsFeeAddress, coin.network);\n    psbt.addOutput({ script: krsFeeOutputScript, value: krsFee });\n  }\n\n  if (isUnsignedSweep) {\n    // TODO BTC-317 - When ready to PSBTify OVC, send psbt hex and skip unspents in response.\n    const txHex = psbt.getUnsignedTx().toBuffer().toString('hex');\n    return formatForOfflineVault(coin.getChain(), txInfo as OfflineVaultTxInfo, txHex);\n  } else {\n    signAndVerifyPsbt(psbt, walletKeys.user, { isLastSignature: false });\n    if (isKrsRecovery) {\n      // The KRS provider keyternal solely supports P2SH, P2WSH, and P2SH-P2WSH input script types.\n      // It currently uses an outdated BitGoJS SDK, which relies on a legacy transaction builder for cosigning.\n      // Unfortunately, upgrading the keyternal code presents challenges,\n      // which hinders the integration of the latest BitGoJS SDK with PSBT signing support.\n      txInfo.transactionHex =\n        params.krsProvider === 'keyternal'\n          ? utxolib.bitgo.extractP2msOnlyHalfSignedTx(psbt).toBuffer().toString('hex')\n          : psbt.toHex();\n    } else {\n      const tx = signAndVerifyPsbt(psbt, walletKeys.backup, { isLastSignature: true });\n      txInfo.transactionHex = tx.toBuffer().toString('hex');\n    }\n  }\n\n  if (isKrsRecovery) {\n    txInfo.coin = coin.getChain();\n    txInfo.backupKey = params.backupKey;\n    txInfo.recoveryAmount = Number(recoveryAmount);\n    txInfo.recoveryAmountString = recoveryAmount.toString();\n  }\n\n  return txInfo;\n}\n\nexport interface BitGoV1Unspent {\n  tx_hash: string;\n  tx_output_n: number;\n  value: number;\n}\n\nexport interface V1SweepParams {\n  walletId: string;\n  walletPassphrase: string;\n  unspents: BitGoV1Unspent[];\n  recoveryDestination: string;\n  userKey: string;\n  otp: string;\n}\n\nexport interface V1RecoverParams extends Omit<V1SweepParams, 'otp'> {\n  backupKey: string;\n}\n\nexport async function v1BackupKeyRecovery(\n  coin: AbstractUtxoCoin,\n  bitgo: BitGoBase,\n  params: V1RecoverParams\n): Promise<string> {\n  if (\n    _.isUndefined(params.recoveryDestination) ||\n    !coin.isValidAddress(params.recoveryDestination, { anyFormat: true })\n  ) {\n    throw new Error('invalid recoveryDestination');\n  }\n\n  const recoveryFeePerByte = await getRecoveryFeePerBytes(coin, { defaultValue: 50 });\n  const v1wallet = await bitgo.wallets().get({ id: params.walletId });\n  return await v1wallet.recover({\n    ...params,\n    feeRate: recoveryFeePerByte,\n  });\n}\n\nexport async function v1Sweep(\n  coin: AbstractUtxoCoin,\n  bitgo: BitGoBase,\n  params: V1SweepParams\n): Promise<{\n  tx: string;\n  hash: string;\n  status: string;\n}> {\n  if (\n    _.isUndefined(params.recoveryDestination) ||\n    !coin.isValidAddress(params.recoveryDestination, { anyFormat: true })\n  ) {\n    throw new Error('invalid recoveryDestination');\n  }\n\n  let recoveryFeePerByte = 100;\n  if (bitgo.env === 'prod') {\n    recoveryFeePerByte = await getRecoveryFeePerBytes(coin, { defaultValue: 100 });\n  }\n\n  const v1wallet = await bitgo.wallets().get({ id: params.walletId });\n  return await v1wallet.sweep({\n    ...params,\n    feeRate: recoveryFeePerByte,\n  });\n}\n"]}Выполнить команду
Для локальной разработки. Не используйте в интернете!