ccxt
Version:
62 lines (57 loc) • 2.25 kB
JavaScript
;
Object.defineProperty(exports, '__esModule', { value: true });
require('../utils/base58.js');
require('../utils/errors.js');
require('../utils/events.js');
require('../utils/fixednumber.js');
var maths = require('../utils/maths.js');
var properties = require('../utils/properties.js');
require('../utils/utf8.js');
require('../../../base/functions/platform.js');
require('../../../base/functions/encode.js');
require('../../../base/functions/crypto.js');
require('../../noble-hashes/sha3.js');
require('../../noble-hashes/sha256.js');
var typed = require('../typed.js');
var abstractCoder = require('./abstract-coder.js');
// ----------------------------------------------------------------------------
const BN_0 = BigInt(0);
const BN_1 = BigInt(1);
const BN_MAX_UINT256 = BigInt("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
/**
* @_ignore
*/
class NumberCoder extends abstractCoder.Coder {
constructor(size, signed, localName) {
const name = ((signed ? "int" : "uint") + (size * 8));
super(name, name, localName, false);
properties.defineProperties(this, { size, signed }, { size: "number", signed: "boolean" });
}
defaultValue() {
return 0;
}
encode(writer, _value) {
let value = maths.getBigInt(typed.Typed.dereference(_value, this.type));
// Check bounds are safe for encoding
let maxUintValue = maths.mask(BN_MAX_UINT256, abstractCoder.WordSize * 8);
if (this.signed) {
let bounds = maths.mask(maxUintValue, (this.size * 8) - 1);
if (value > bounds || value < -(bounds + BN_1)) {
this._throwError("value out-of-bounds", _value);
}
value = maths.toTwos(value, 8 * abstractCoder.WordSize);
}
else if (value < BN_0 || value > maths.mask(maxUintValue, this.size * 8)) {
this._throwError("value out-of-bounds", _value);
}
return writer.writeValue(value);
}
decode(reader) {
let value = maths.mask(reader.readValue(), this.size * 8);
if (this.signed) {
value = maths.fromTwos(value, this.size * 8);
}
return value;
}
}
exports.NumberCoder = NumberCoder;