turtlecoin-wallet-backend
Version:
[](https://npmjs.org/package/turtlecoin-wallet-backend)
73 lines (72 loc) • 3.79 kB
JavaScript
;
// Copyright (c) 2019-2020, Zpalmtree
//
// Please see the included LICENSE file for more information.
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.underivePublicKey = exports.generateKeyImage = exports.generateKeyImagePrimitive = exports.generateKeyDerivation = void 0;
const turtlecoin_utils_1 = require("turtlecoin-utils");
const CnUtils_1 = require("./CnUtils");
const TurtleCoinCrypto = new turtlecoin_utils_1.Crypto();
const nullKey = '0'.repeat(64);
function generateKeyDerivation(transactionPublicKey, privateViewKey, config) {
return __awaiter(this, void 0, void 0, function* () {
try {
return CnUtils_1.CryptoUtils(config).generateKeyDerivation(transactionPublicKey, privateViewKey);
}
catch (err) {
return nullKey;
}
});
}
exports.generateKeyDerivation = generateKeyDerivation;
function generateKeyImagePrimitive(publicSpendKey, privateSpendKey, outputIndex, derivation, config) {
return __awaiter(this, void 0, void 0, function* () {
if (config.derivePublicKey && config.deriveSecretKey && config.generateKeyImage) {
/* Derive the transfer public key from the derived key, the output index, and our public spend key */
const publicEphemeral = yield config.derivePublicKey(derivation, outputIndex, publicSpendKey);
/* Derive the key image private key from the derived key, the output index, and our spend secret key */
const privateEphemeral = yield config.deriveSecretKey(derivation, outputIndex, privateSpendKey);
/* Generate the key image */
const keyImage = yield config.generateKeyImage(publicEphemeral, privateEphemeral);
return [keyImage, privateEphemeral];
}
try {
const keys = yield CnUtils_1.CryptoUtils(config).generateKeyImagePrimitive(publicSpendKey, privateSpendKey, outputIndex, derivation);
return [keys.keyImage, keys.privateEphemeral];
}
catch (err) {
return [nullKey, nullKey];
}
});
}
exports.generateKeyImagePrimitive = generateKeyImagePrimitive;
function generateKeyImage(transactionPublicKey, privateViewKey, publicSpendKey, privateSpendKey, transactionIndex, config) {
return __awaiter(this, void 0, void 0, function* () {
const derivation = yield generateKeyDerivation(transactionPublicKey, privateViewKey, config);
return generateKeyImagePrimitive(publicSpendKey, privateSpendKey, transactionIndex, derivation, config);
});
}
exports.generateKeyImage = generateKeyImage;
function underivePublicKey(derivation, outputIndex, outputKey, config) {
return __awaiter(this, void 0, void 0, function* () {
if (config.underivePublicKey) {
return config.underivePublicKey(derivation, outputIndex, outputKey);
}
try {
return TurtleCoinCrypto.underivePublicKey(derivation, outputIndex, outputKey);
}
catch (err) {
return nullKey;
}
});
}
exports.underivePublicKey = underivePublicKey;