@tatumio/tatum-v1
Version:
Tatum API client allows browsers and Node.js clients to interact with Tatum API.
86 lines • 6.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.generateAddress = exports.generatePubKey = exports.hexStr2byteArray = void 0;
/* tslint:disable:no-bitwise */
const elliptic_1 = require("elliptic");
const js_sha3_1 = require("js-sha3");
const hexChar2byte = (c) => {
let d = 0;
if (c >= 'A' && c <= 'F')
d = c.charCodeAt(0) - 'A'.charCodeAt(0) + 10;
else if (c >= 'a' && c <= 'f')
d = c.charCodeAt(0) - 'a'.charCodeAt(0) + 10;
else if (c >= '0' && c <= '9')
d = c.charCodeAt(0) - '0'.charCodeAt(0);
return d;
};
const isHexChar = (c) => {
if ((c >= 'A' && c <= 'F') ||
(c >= 'a' && c <= 'f') ||
(c >= '0' && c <= '9')) {
return 1;
}
return 0;
};
const hexStr2byteArray = (str) => {
const byteArray = [];
let d = 0;
let j = 0;
let k = 0;
for (let i = 0; i < str.length; i++) {
const c = str.charAt(i);
if (isHexChar(c)) {
d <<= 4;
d += hexChar2byte(c);
j++;
if (0 === (j % 2)) {
byteArray[k++] = d;
d = 0;
}
}
}
return byteArray;
};
exports.hexStr2byteArray = hexStr2byteArray;
// @ts-ignore
const byte2hexStr = byte => {
const hexByteMap = '0123456789ABCDEF';
let str = '';
str += hexByteMap.charAt(byte >> 4);
str += hexByteMap.charAt(byte & 0x0f);
return str;
};
const byteArray2hexStr = (byteArray) => {
let str = '';
for (let i = 0; i < (byteArray.length); i++)
str += byte2hexStr(byteArray[i]);
return str;
};
const computeAddress = (pubBytes) => {
if (pubBytes.length === 65)
pubBytes = pubBytes.slice(1);
const hash = js_sha3_1.keccak_256(pubBytes).toString();
const addressHex = '41' + hash.substring(24);
return exports.hexStr2byteArray(addressHex);
};
const generatePubKey = (bytes) => {
const ec = new elliptic_1.ec('secp256k1');
const key = ec.keyFromPublic(bytes, 'bytes');
const pubkey = key.getPublic();
const x = pubkey.getX();
const y = pubkey.getY();
let xHex = x.toString('hex');
while (xHex.length < 64) {
xHex = '0' + xHex;
}
let yHex = y.toString('hex');
while (yHex.length < 64) {
yHex = '0' + yHex;
}
return '04' + xHex + yHex;
};
exports.generatePubKey = generatePubKey;
// @ts-ignore
const generateAddress = (publicKey) => byteArray2hexStr(computeAddress(exports.hexStr2byteArray(exports.generatePubKey(publicKey))));
exports.generateAddress = generateAddress;
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