viem
Version:
69 lines • 2.32 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.assertSize = assertSize;
exports.fromHex = fromHex;
exports.hexToBigInt = hexToBigInt;
exports.hexToBool = hexToBool;
exports.hexToNumber = hexToNumber;
exports.hexToString = hexToString;
const encoding_js_1 = require("../../errors/encoding.js");
const size_js_1 = require("../data/size.js");
const trim_js_1 = require("../data/trim.js");
const toBytes_js_1 = require("./toBytes.js");
function assertSize(hexOrBytes, { size }) {
if ((0, size_js_1.size)(hexOrBytes) > size)
throw new encoding_js_1.SizeOverflowError({
givenSize: (0, size_js_1.size)(hexOrBytes),
maxSize: size,
});
}
function fromHex(hex, toOrOpts) {
const opts = typeof toOrOpts === 'string' ? { to: toOrOpts } : toOrOpts;
const to = opts.to;
if (to === 'number')
return hexToNumber(hex, opts);
if (to === 'bigint')
return hexToBigInt(hex, opts);
if (to === 'string')
return hexToString(hex, opts);
if (to === 'boolean')
return hexToBool(hex, opts);
return (0, toBytes_js_1.hexToBytes)(hex, opts);
}
function hexToBigInt(hex, opts = {}) {
const { signed } = opts;
if (opts.size)
assertSize(hex, { size: opts.size });
const value = BigInt(hex);
if (!signed)
return value;
const size = (hex.length - 2) / 2;
const max = (1n << (BigInt(size) * 8n - 1n)) - 1n;
if (value <= max)
return value;
return value - BigInt(`0x${'f'.padStart(size * 2, 'f')}`) - 1n;
}
function hexToBool(hex_, opts = {}) {
let hex = hex_;
if (opts.size) {
assertSize(hex, { size: opts.size });
hex = (0, trim_js_1.trim)(hex);
}
if ((0, trim_js_1.trim)(hex) === '0x00')
return false;
if ((0, trim_js_1.trim)(hex) === '0x01')
return true;
throw new encoding_js_1.InvalidHexBooleanError(hex);
}
function hexToNumber(hex, opts = {}) {
return Number(hexToBigInt(hex, opts));
}
function hexToString(hex, opts = {}) {
let bytes = (0, toBytes_js_1.hexToBytes)(hex);
if (opts.size) {
assertSize(bytes, { size: opts.size });
bytes = (0, trim_js_1.trim)(bytes, { dir: 'right' });
}
return new TextDecoder().decode(bytes);
}
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