@zlattice/lattice-js/dist/esm/utils/base58.js

Lattice blockchain TypeScript SDK with dual module support (CJS + ESM)

import { Base58 } from '@ethersproject/basex';
import { sha256 } from "@ethersproject/sha2";
const ErrChecksum = new Error('checksum error');
const ErrInvalidFormat = new Error('invalid format: version and/or checksum bytes missing');
class Base58Impl {
    checkDecode(input) {
        const decoded = Base58.decode(input);
        if (decoded.length < 5) {
            throw ErrInvalidFormat;
        }
        const version = decoded[0];
        const sum = new Uint8Array(4);
        sum.set(decoded.subarray(decoded.length - 4));
        const expectedSum = this.checksum(Buffer.from(decoded.subarray(0, decoded.length - 4)));
        if (!expectedSum.equals(Buffer.from(sum))) {
            throw ErrChecksum;
        }
        const payload = decoded.subarray(1, decoded.length - 4);
        return { result: Buffer.from(payload), version: version };
    }
    checkEncode(input, version) {
        const b = new Uint8Array(1 + input.length + 4);
        b[0] = version;
        b.set(input, 1);
        const sum = this.checksum(Buffer.from(b.subarray(0, 1 + input.length)));
        b.set(sum, 1 + input.length);
        return Base58.encode(b);
    }
    checksum(input) {
        const hash = sha256(input);
        const hash2 = sha256(hash);
        const bytes = Buffer.from(hash2.slice(2), "hex");
        return bytes.subarray(0, 4);
    }
}
export { Base58Impl };
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