@steemit/steem-js/lib/auth/serializer/src/fast_parser.js

JavaScript library for the Steem blockchain

"use strict";

const ecc = require("../../ecc");
const PublicKey = ecc.PublicKey;
class FastParser {
  static fixed_data(b, len, buffer) {
    if (!b) {
      return;
    }
    if (buffer) {
      let data = buffer.slice(0, len).toString('binary');
      b.append(data, 'binary');
      while (len-- > data.length) {
        b.writeUint8(0);
      }
    } else {
      let b_copy = b.copy(b.offset, b.offset + len);
      b.skip(len);
      return new Buffer.from(b_copy.toBinary(), 'binary');
    }
  }
  static public_key(b, public_key) {
    if (!b) {
      return;
    }
    if (public_key) {
      var buffer = public_key.toBuffer();
      b.append(buffer.toString('binary'), 'binary');
      return;
    } else {
      buffer = FastParser.fixed_data(b, 33);
      return PublicKey.fromBuffer(buffer);
    }
  }
  static ripemd160(b, ripemd160) {
    if (!b) {
      return;
    }
    if (ripemd160) {
      FastParser.fixed_data(b, 20, ripemd160);
      return;
    } else {
      return FastParser.fixed_data(b, 20);
    }
  }
  static time_point_sec(b, epoch) {
    if (epoch) {
      epoch = Math.ceil(epoch / 1000);
      b.writeInt32(epoch);
      return;
    } else {
      epoch = b.readInt32(); // fc::time_point_sec
      return new Date(epoch * 1000);
    }
  }
}
module.exports = FastParser;