@0x/subproviders
Version:
A few useful web3 subproviders including a LedgerSubprovider useful for adding Ledger Nano S support.
67 lines • 2.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.walletUtils = void 0;
const ethUtil = require("ethereumjs-util");
const DEFAULT_ADDRESS_SEARCH_LIMIT = 1000;
class DerivedHDKeyInfoIterator {
constructor(initialDerivedKey, searchLimit = DEFAULT_ADDRESS_SEARCH_LIMIT) {
this._searchLimit = searchLimit;
this._parentDerivedKeyInfo = initialDerivedKey;
this._index = 0;
}
next() {
const baseDerivationPath = this._parentDerivedKeyInfo.baseDerivationPath;
const derivationIndex = this._index;
const fullDerivationPath = `m/${baseDerivationPath}/${derivationIndex}`;
const path = `m/${derivationIndex}`;
const hdKey = this._parentDerivedKeyInfo.hdKey.derive(path);
const address = exports.walletUtils.addressOfHDKey(hdKey);
const derivedKey = {
address,
hdKey,
baseDerivationPath,
derivationPath: fullDerivationPath,
};
const isDone = this._index === this._searchLimit;
this._index++;
return {
done: isDone,
value: derivedKey,
};
}
[Symbol.iterator]() {
return this;
}
}
exports.walletUtils = {
calculateDerivedHDKeyInfos(parentDerivedKeyInfo, numberOfKeys) {
const derivedKeys = [];
const derivedKeyIterator = new DerivedHDKeyInfoIterator(parentDerivedKeyInfo, numberOfKeys);
for (const key of derivedKeyIterator) {
derivedKeys.push(key);
}
return derivedKeys;
},
findDerivedKeyInfoForAddressIfExists(address, parentDerivedKeyInfo, searchLimit) {
const lowercaseAddress = address.toLowerCase();
let matchedKey;
const derivedKeyIterator = new DerivedHDKeyInfoIterator(parentDerivedKeyInfo, searchLimit);
for (const key of derivedKeyIterator) {
if (key.address === lowercaseAddress) {
matchedKey = key;
break;
}
}
return matchedKey;
},
addressOfHDKey(hdKey) {
const shouldSanitizePublicKey = true;
const derivedPublicKey = hdKey.publicKey;
const ethereumAddressUnprefixed = ethUtil
.publicToAddress(derivedPublicKey, shouldSanitizePublicKey)
.toString('hex');
const address = ethUtil.addHexPrefix(ethereumAddressUnprefixed).toLowerCase();
return address;
},
};
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