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Web3-Onboard makes it simple to connect Ethereum hardware and software wallets to your dapp. Features standardised spec compliant web3 providers for all supported wallets, framework agnostic modern javascript UI with code splitting, CSS customization, mul
141 lines • 5.6 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getCreate2Address = exports.getContractAddress = exports.getIcapAddress = exports.isAddress = exports.getAddress = void 0;
var bytes_1 = require("@ethersproject/bytes");
var bignumber_1 = require("@ethersproject/bignumber");
var keccak256_1 = require("@ethersproject/keccak256");
var rlp_1 = require("@ethersproject/rlp");
var logger_1 = require("@ethersproject/logger");
var _version_1 = require("./_version");
var logger = new logger_1.Logger(_version_1.version);
function getChecksumAddress(address) {
if (!(0, bytes_1.isHexString)(address, 20)) {
logger.throwArgumentError("invalid address", "address", address);
}
address = address.toLowerCase();
var chars = address.substring(2).split("");
var expanded = new Uint8Array(40);
for (var i = 0; i < 40; i++) {
expanded[i] = chars[i].charCodeAt(0);
}
var hashed = (0, bytes_1.arrayify)((0, keccak256_1.keccak256)(expanded));
for (var i = 0; i < 40; i += 2) {
if ((hashed[i >> 1] >> 4) >= 8) {
chars[i] = chars[i].toUpperCase();
}
if ((hashed[i >> 1] & 0x0f) >= 8) {
chars[i + 1] = chars[i + 1].toUpperCase();
}
}
return "0x" + chars.join("");
}
// Shims for environments that are missing some required constants and functions
var MAX_SAFE_INTEGER = 0x1fffffffffffff;
function log10(x) {
if (Math.log10) {
return Math.log10(x);
}
return Math.log(x) / Math.LN10;
}
// See: https://en.wikipedia.org/wiki/International_Bank_Account_Number
// Create lookup table
var ibanLookup = {};
for (var i = 0; i < 10; i++) {
ibanLookup[String(i)] = String(i);
}
for (var i = 0; i < 26; i++) {
ibanLookup[String.fromCharCode(65 + i)] = String(10 + i);
}
// How many decimal digits can we process? (for 64-bit float, this is 15)
var safeDigits = Math.floor(log10(MAX_SAFE_INTEGER));
function ibanChecksum(address) {
address = address.toUpperCase();
address = address.substring(4) + address.substring(0, 2) + "00";
var expanded = address.split("").map(function (c) { return ibanLookup[c]; }).join("");
// Javascript can handle integers safely up to 15 (decimal) digits
while (expanded.length >= safeDigits) {
var block = expanded.substring(0, safeDigits);
expanded = parseInt(block, 10) % 97 + expanded.substring(block.length);
}
var checksum = String(98 - (parseInt(expanded, 10) % 97));
while (checksum.length < 2) {
checksum = "0" + checksum;
}
return checksum;
}
;
function getAddress(address) {
var result = null;
if (typeof (address) !== "string") {
logger.throwArgumentError("invalid address", "address", address);
}
if (address.match(/^(0x)?[0-9a-fA-F]{40}$/)) {
// Missing the 0x prefix
if (address.substring(0, 2) !== "0x") {
address = "0x" + address;
}
result = getChecksumAddress(address);
// It is a checksummed address with a bad checksum
if (address.match(/([A-F].*[a-f])|([a-f].*[A-F])/) && result !== address) {
logger.throwArgumentError("bad address checksum", "address", address);
}
// Maybe ICAP? (we only support direct mode)
}
else if (address.match(/^XE[0-9]{2}[0-9A-Za-z]{30,31}$/)) {
// It is an ICAP address with a bad checksum
if (address.substring(2, 4) !== ibanChecksum(address)) {
logger.throwArgumentError("bad icap checksum", "address", address);
}
result = (0, bignumber_1._base36To16)(address.substring(4));
while (result.length < 40) {
result = "0" + result;
}
result = getChecksumAddress("0x" + result);
}
else {
logger.throwArgumentError("invalid address", "address", address);
}
return result;
}
exports.getAddress = getAddress;
function isAddress(address) {
try {
getAddress(address);
return true;
}
catch (error) { }
return false;
}
exports.isAddress = isAddress;
function getIcapAddress(address) {
var base36 = (0, bignumber_1._base16To36)(getAddress(address).substring(2)).toUpperCase();
while (base36.length < 30) {
base36 = "0" + base36;
}
return "XE" + ibanChecksum("XE00" + base36) + base36;
}
exports.getIcapAddress = getIcapAddress;
// http://ethereum.stackexchange.com/questions/760/how-is-the-address-of-an-ethereum-contract-computed
function getContractAddress(transaction) {
var from = null;
try {
from = getAddress(transaction.from);
}
catch (error) {
logger.throwArgumentError("missing from address", "transaction", transaction);
}
var nonce = (0, bytes_1.stripZeros)((0, bytes_1.arrayify)(bignumber_1.BigNumber.from(transaction.nonce).toHexString()));
return getAddress((0, bytes_1.hexDataSlice)((0, keccak256_1.keccak256)((0, rlp_1.encode)([from, nonce])), 12));
}
exports.getContractAddress = getContractAddress;
function getCreate2Address(from, salt, initCodeHash) {
if ((0, bytes_1.hexDataLength)(salt) !== 32) {
logger.throwArgumentError("salt must be 32 bytes", "salt", salt);
}
if ((0, bytes_1.hexDataLength)(initCodeHash) !== 32) {
logger.throwArgumentError("initCodeHash must be 32 bytes", "initCodeHash", initCodeHash);
}
return getAddress((0, bytes_1.hexDataSlice)((0, keccak256_1.keccak256)((0, bytes_1.concat)(["0xff", getAddress(from), salt, initCodeHash])), 12));
}
exports.getCreate2Address = getCreate2Address;
//# sourceMappingURL=index.js.map