ccxt
Version:
63 lines (58 loc) • 2.11 kB
JavaScript
;
Object.defineProperty(exports, '__esModule', { value: true });
var num = require('../num.js');
var shortString = require('../shortString.js');
// ----------------------------------------------------------------------------
/**
* convert a Cairo ByteArray to a JS string
* @param myByteArray Cairo representation of a LongString
* @returns a JS string
* @example
* ```typescript
* const myByteArray = {
* data: [],
* pending_word: '0x414243444546474849',
* pending_word_len: 9
* }
* const result: String = stringFromByteArray(myByteArray); // ABCDEFGHI
* ```
*/
function stringFromByteArray(myByteArray) {
const pending_word = BigInt(myByteArray.pending_word) === 0n
? ''
: shortString.decodeShortString(num.toHex(myByteArray.pending_word));
return (myByteArray.data.reduce((cumuledString, encodedString) => {
const add = BigInt(encodedString) === 0n ? '' : shortString.decodeShortString(num.toHex(encodedString));
return cumuledString + add;
}, '') + pending_word);
}
/**
* convert a JS string to a Cairo ByteArray
* @param targetString a JS string
* @returns Cairo representation of a LongString
* @example
* ```typescript
* const myByteArray: ByteArray = byteArrayFromString("ABCDEFGHI");
* ```
* Result is :
* {
* data: [],
* pending_word: '0x414243444546474849',
* pending_word_len: 9
* }
*/
function byteArrayFromString(targetString) {
const shortStrings = shortString.splitLongString(targetString);
const remainder = shortStrings[shortStrings.length - 1];
const shortStringsEncoded = shortStrings.map(shortString.encodeShortString);
const [pendingWord, pendingWordLength] = remainder === undefined || remainder.length === 31
? ['0x00', 0]
: [shortStringsEncoded.pop(), remainder.length];
return {
data: shortStringsEncoded.length === 0 ? [] : shortStringsEncoded,
pending_word: pendingWord,
pending_word_len: pendingWordLength,
};
}
exports.byteArrayFromString = byteArrayFromString;
exports.stringFromByteArray = stringFromByteArray;