@pythnetwork/client
Version:
Client for consuming Pyth price data
165 lines (164 loc) • 9.63 kB
JavaScript
;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.PythHttpClient = void 0;
var _1 = require(".");
/**
* Reads Pyth price data from a solana web3 connection. This class uses a single HTTP call.
* Use the method getData() to get updated prices values.
*/
var PythHttpClient = /** @class */ (function () {
function PythHttpClient(connection, pythProgramKey, commitment) {
if (commitment === void 0) { commitment = 'finalized'; }
this.connection = connection;
this.pythProgramKey = pythProgramKey;
this.commitment = commitment;
}
/*
* Get Pyth Network account information and return actual price state.
* The result contains lists of asset types, product symbols and their prices.
*/
PythHttpClient.prototype.getData = function () {
return __awaiter(this, void 0, void 0, function () {
var assetTypes, productSymbols, products, productFromSymbol, productPrice, prices, _a, accountList, currentSlot, priceDataQueue, productAccountKeyToProduct, permissionData, result;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
assetTypes = new Set();
productSymbols = new Set();
products = new Set();
productFromSymbol = new Map();
productPrice = new Map();
prices = new Array();
return [4 /*yield*/, Promise.all([
this.connection.getProgramAccounts(this.pythProgramKey, this.commitment),
this.connection.getSlot(this.commitment),
])
// Populate products and prices
];
case 1:
_a = _b.sent(), accountList = _a[0], currentSlot = _a[1];
priceDataQueue = new Array();
productAccountKeyToProduct = new Map();
accountList.forEach(function (singleAccount) {
var base = _1.parseBaseData(singleAccount.account.data);
if (base) {
switch (base.type) {
case _1.AccountType.Mapping:
// We can skip these because we're going to get every account owned by this program anyway.
break;
case _1.AccountType.Product:
var productData = _1.parseProductData(singleAccount.account.data);
productAccountKeyToProduct.set(singleAccount.pubkey.toBase58(), productData.product);
assetTypes.add(productData.product.asset_type);
productSymbols.add(productData.product.symbol);
products.add(productData.product);
productFromSymbol.set(productData.product.symbol, productData.product);
break;
case _1.AccountType.Price:
var priceData = _1.parsePriceData(singleAccount.account.data, currentSlot);
priceDataQueue.push(priceData);
break;
case _1.AccountType.Test:
break;
case _1.AccountType.Permission:
permissionData = _1.parsePermissionData(singleAccount.account.data);
break;
default:
throw new Error("Unknown account type: " + base.type + ". Try upgrading pyth-client.");
}
}
});
priceDataQueue.forEach(function (priceData) {
var product = productAccountKeyToProduct.get(priceData.productAccountKey.toBase58());
if (product) {
productPrice.set(product.symbol, priceData);
prices.push(priceData);
}
});
result = {
assetTypes: Array.from(assetTypes),
symbols: Array.from(productSymbols),
products: Array.from(products),
productFromSymbol: productFromSymbol,
productPrice: productPrice,
prices: prices,
permissionData: permissionData,
};
return [2 /*return*/, result];
}
});
});
};
/**
* Get the price state for an array of specified price accounts.
* The result is the price state for the given assets if they exist, throws if at least one account does not exist.
*/
PythHttpClient.prototype.getAssetPricesFromAccounts = function (priceAccounts) {
return __awaiter(this, void 0, void 0, function () {
var priceDatas, _a, accountInfos, currentSlot, i, accInfo, baseData, priceData;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
priceDatas = [];
return [4 /*yield*/, Promise.all([
this.connection.getMultipleAccountsInfo(priceAccounts, this.commitment),
this.connection.getSlot(this.commitment),
])];
case 1:
_a = _b.sent(), accountInfos = _a[0], currentSlot = _a[1];
for (i = 0; i < priceAccounts.length; i++) {
accInfo = accountInfos[i];
if (!accInfo) {
throw new Error('Could not get account info for account ' + priceAccounts[i].toBase58());
}
baseData = _1.parseBaseData(accInfo.data);
if (baseData === undefined || baseData.type !== _1.AccountType.Price) {
throw new Error('Account ' + priceAccounts[i].toBase58() + ' is not a price account');
}
priceData = _1.parsePriceData(accInfo.data, currentSlot);
priceDatas.push(priceData);
}
return [2 /*return*/, priceDatas];
}
});
});
};
return PythHttpClient;
}());
exports.PythHttpClient = PythHttpClient;