diamante-base
Version:
Low-level support library for the Diamante network.
125 lines (120 loc) • 6.68 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.LiquidityPoolAsset = void 0;
var _xdr = _interopRequireDefault(require("./xdr"));
var _asset = require("./asset");
var _get_liquidity_pool_id = require("./get_liquidity_pool_id");
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", { writable: !1 }), e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
/**
* LiquidityPoolAsset class represents a liquidity pool trustline change.
*
* @constructor
* @param {Asset} assetA – The first asset in the Pool, it must respect the rule assetA < assetB. See {@link Asset.compare} for more details on how assets are sorted.
* @param {Asset} assetB – The second asset in the Pool, it must respect the rule assetA < assetB. See {@link Asset.compare} for more details on how assets are sorted.
* @param {number} fee – The liquidity pool fee. For now the only fee supported is `30`.
*/
var LiquidityPoolAsset = exports.LiquidityPoolAsset = /*#__PURE__*/function () {
function LiquidityPoolAsset(assetA, assetB, fee) {
_classCallCheck(this, LiquidityPoolAsset);
if (!assetA || !(assetA instanceof _asset.Asset)) {
throw new Error('assetA is invalid');
}
if (!assetB || !(assetB instanceof _asset.Asset)) {
throw new Error('assetB is invalid');
}
if (_asset.Asset.compare(assetA, assetB) !== -1) {
throw new Error('Assets are not in lexicographic order');
}
if (!fee || fee !== _get_liquidity_pool_id.LiquidityPoolFeeV18) {
throw new Error('fee is invalid');
}
this.assetA = assetA;
this.assetB = assetB;
this.fee = fee;
}
/**
* Returns a liquidity pool asset object from its XDR ChangeTrustAsset object
* representation.
* @param {xdr.ChangeTrustAsset} ctAssetXdr - The asset XDR object.
* @returns {LiquidityPoolAsset}
*/
return _createClass(LiquidityPoolAsset, [{
key: "toXDRObject",
value:
/**
* Returns the `xdr.ChangeTrustAsset` object for this liquidity pool asset.
*
* Note: To convert from an {@link Asset `Asset`} to `xdr.ChangeTrustAsset`
* please refer to the
* {@link Asset.toChangeTrustXDRObject `Asset.toChangeTrustXDRObject`} method.
*
* @returns {xdr.ChangeTrustAsset} XDR ChangeTrustAsset object.
*/
function toXDRObject() {
var lpConstantProductParamsXdr = new _xdr["default"].LiquidityPoolConstantProductParameters({
assetA: this.assetA.toXDRObject(),
assetB: this.assetB.toXDRObject(),
fee: this.fee
});
var lpParamsXdr = new _xdr["default"].LiquidityPoolParameters('liquidityPoolConstantProduct', lpConstantProductParamsXdr);
return new _xdr["default"].ChangeTrustAsset('assetTypePoolShare', lpParamsXdr);
}
/**
* @returns {LiquidityPoolParameters} Liquidity pool parameters.
*/
}, {
key: "getLiquidityPoolParameters",
value: function getLiquidityPoolParameters() {
return _objectSpread(_objectSpread({}, this), {}, {
assetA: this.assetA,
assetB: this.assetB,
fee: this.fee
});
}
/**
* @see [Assets concept](https://developers.diamante.org/docs/glossary/assets/)
* @returns {AssetType.liquidityPoolShares} asset type. Can only be `liquidity_pool_shares`.
*/
}, {
key: "getAssetType",
value: function getAssetType() {
return 'liquidity_pool_shares';
}
/**
* @param {LiquidityPoolAsset} other the LiquidityPoolAsset to compare
* @returns {boolean} `true` if this asset equals the given asset.
*/
}, {
key: "equals",
value: function equals(other) {
return this.assetA.equals(other.assetA) && this.assetB.equals(other.assetB) && this.fee === other.fee;
}
}, {
key: "toString",
value: function toString() {
var poolId = (0, _get_liquidity_pool_id.getLiquidityPoolId)('constant_product', this.getLiquidityPoolParameters()).toString('hex');
return "liquidity_pool:".concat(poolId);
}
}], [{
key: "fromOperation",
value: function fromOperation(ctAssetXdr) {
var assetType = ctAssetXdr["switch"]();
if (assetType === _xdr["default"].AssetType.assetTypePoolShare()) {
var liquidityPoolParameters = ctAssetXdr.liquidityPool().constantProduct();
return new this(_asset.Asset.fromOperation(liquidityPoolParameters.assetA()), _asset.Asset.fromOperation(liquidityPoolParameters.assetB()), liquidityPoolParameters.fee());
}
throw new Error("Invalid asset type: ".concat(assetType.name));
}
}]);
}();