ripple-binary-codec
Version:
XRP Ledger binary codec
104 lines • 3.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Issue = void 0;
const utils_1 = require("@xrplf/isomorphic/utils");
const binary_parser_1 = require("../serdes/binary-parser");
const account_id_1 = require("./account-id");
const currency_1 = require("./currency");
const serialized_type_1 = require("./serialized-type");
const hash_192_1 = require("./hash-192");
/**
* Type guard for Issue Object
*/
function isIssueObject(arg) {
const keys = Object.keys(arg).sort();
const isXRP = keys.length === 1 && keys[0] === 'currency';
const isIOU = keys.length === 2 && keys[0] === 'currency' && keys[1] === 'issuer';
const isMPT = keys.length === 1 && keys[0] === 'mpt_issuance_id';
return isXRP || isIOU || isMPT;
}
/**
* Class for serializing/Deserializing Amounts
*/
class Issue extends serialized_type_1.SerializedType {
constructor(bytes) {
super(bytes !== null && bytes !== void 0 ? bytes : Issue.ZERO_ISSUED_CURRENCY.bytes);
}
/**
* Construct an amount from an IOU or string amount
*
* @param value An Amount, object representing an IOU, MPTAmount, or a string
* representing an integer amount
* @returns An Issue object
*/
static from(value) {
if (value instanceof Issue) {
return value;
}
if (isIssueObject(value)) {
if (value.currency) {
const currency = currency_1.Currency.from(value.currency.toString()).toBytes();
//IOU case
if (value.issuer) {
const issuer = account_id_1.AccountID.from(value.issuer.toString()).toBytes();
return new Issue((0, utils_1.concat)([currency, issuer]));
}
//XRP case
return new Issue(currency);
}
// MPT case
if (value.mpt_issuance_id) {
const mptIssuanceIdBytes = hash_192_1.Hash192.from(value.mpt_issuance_id.toString()).toBytes();
return new Issue(mptIssuanceIdBytes);
}
}
throw new Error('Invalid type to construct an Amount');
}
/**
* Read an amount from a BinaryParser
*
* @param parser BinaryParser to read the Amount from
* @param hint The number of bytes to consume from the parser.
* For an MPT amount, pass 24 (the fixed length for Hash192).
*
* @returns An Issue object
*/
static fromParser(parser, hint) {
if (hint === hash_192_1.Hash192.width) {
const mptBytes = parser.read(hash_192_1.Hash192.width);
return new Issue(mptBytes);
}
const currency = parser.read(20);
if (new currency_1.Currency(currency).toJSON() === 'XRP') {
return new Issue(currency);
}
const currencyAndIssuer = [currency, parser.read(20)];
return new Issue((0, utils_1.concat)(currencyAndIssuer));
}
/**
* Get the JSON representation of this Amount
*
* @returns the JSON interpretation of this.bytes
*/
toJSON() {
// If the buffer is exactly 24 bytes, treat it as an MPT amount.
if (this.toBytes().length === hash_192_1.Hash192.width) {
return {
mpt_issuance_id: this.toHex().toUpperCase(),
};
}
const parser = new binary_parser_1.BinaryParser(this.toString());
const currency = currency_1.Currency.fromParser(parser);
if (currency.toJSON() === 'XRP') {
return { currency: currency.toJSON() };
}
const issuer = account_id_1.AccountID.fromParser(parser);
return {
currency: currency.toJSON(),
issuer: issuer.toJSON(),
};
}
}
exports.Issue = Issue;
Issue.ZERO_ISSUED_CURRENCY = new Issue(new Uint8Array(20));
//# sourceMappingURL=issue.js.map