@maxosllc/smart-order-router
Version:
BlockDAG Smart Order Router
146 lines • 14 kB
JavaScript
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CachingTokenListProvider = void 0;
const sdk_core_1 = require("@uniswap/sdk-core");
const axios_1 = __importDefault(require("axios"));
const log_1 = require("../util/log");
const metric_1 = require("../util/metric");
class CachingTokenListProvider {
/**
* Creates an instance of CachingTokenListProvider.
* Token metadata (e.g. symbol and decimals) generally don't change so can be cached indefinitely.
*
* @param chainId The chain id to use.
* @param tokenList The token list to get the tokens from.
* @param tokenCache Cache instance to hold cached tokens.
*/
constructor(chainId, tokenList, tokenCache) {
this.tokenCache = tokenCache;
this.CACHE_KEY = (tokenInfo) => `token-list-token-${this.chainId}/${this.tokenList.name}/${this.tokenList.timestamp}/${this.tokenList.version}/${tokenInfo.address.toLowerCase()}/${tokenInfo.decimals}/${tokenInfo.symbol}/${tokenInfo.name}`;
this.CHAIN_SYMBOL_KEY = (chainId, symbol) => `${chainId.toString()}/${symbol}`;
this.CHAIN_ADDRESS_KEY = (chainId, address) => `${chainId.toString()}/${address.toLowerCase()}`;
this.chainId = chainId;
this.tokenList = tokenList;
this.chainToTokenInfos = new Map();
this.chainSymbolToTokenInfo = new Map();
this.chainAddressToTokenInfo = new Map();
for (const tokenInfo of this.tokenList.tokens) {
const chainId = tokenInfo.chainId;
const chainIdString = chainId.toString();
const symbol = tokenInfo.symbol;
const address = tokenInfo.address.toLowerCase();
if (!this.chainToTokenInfos.has(chainIdString)) {
this.chainToTokenInfos.set(chainIdString, []);
}
this.chainToTokenInfos.get(chainIdString).push(tokenInfo);
this.chainSymbolToTokenInfo.set(this.CHAIN_SYMBOL_KEY(chainId, symbol), tokenInfo);
this.chainAddressToTokenInfo.set(this.CHAIN_ADDRESS_KEY(chainId, address), tokenInfo);
}
}
static async fromTokenListURI(chainId, tokenListURI, tokenCache) {
const now = Date.now();
const tokenList = await this.buildTokenList(tokenListURI);
metric_1.metric.putMetric('TokenListLoad', Date.now() - now, metric_1.MetricLoggerUnit.Milliseconds);
return new CachingTokenListProvider(chainId, tokenList, tokenCache);
}
static async buildTokenList(tokenListURI) {
log_1.log.info(`Getting tokenList from ${tokenListURI}.`);
const response = await axios_1.default.get(tokenListURI);
log_1.log.info(`Got tokenList from ${tokenListURI}.`);
const { data: tokenList, status } = response;
if (status != 200) {
log_1.log.error({ response }, `Unabled to get token list from ${tokenListURI}.`);
throw new Error(`Unable to get token list from ${tokenListURI}`);
}
return tokenList;
}
static async fromTokenList(chainId, tokenList, tokenCache) {
const now = Date.now();
const tokenProvider = new CachingTokenListProvider(chainId, tokenList, tokenCache);
metric_1.metric.putMetric('TokenListLoad', Date.now() - now, metric_1.MetricLoggerUnit.Milliseconds);
return tokenProvider;
}
/**
* If no addresses array is specified, all tokens in the token list are
* returned.
*
* @param _addresses (optional) The token addresses to get.
* @returns Promise<TokenAccessor> A token accessor with methods for accessing the tokens.
*/
async getTokens(_addresses) {
var _a;
const addressToToken = new Map();
const symbolToToken = new Map();
const addToken = (token) => {
if (!token)
return;
addressToToken.set(token.address.toLowerCase(), token);
if (token.symbol !== undefined) {
symbolToToken.set(token.symbol.toLowerCase(), token);
}
};
if (_addresses) {
for (const address of _addresses) {
const token = await this.getTokenByAddress(address);
addToken(token);
}
}
else {
const chainTokens = (_a = this.chainToTokenInfos.get(this.chainId.toString())) !== null && _a !== void 0 ? _a : [];
for (const info of chainTokens) {
const token = await this.buildToken(info);
addToken(token);
}
}
return {
getTokenByAddress: (address) => addressToToken.get(address.toLowerCase()),
getTokenBySymbol: (symbol) => symbolToToken.get(symbol.toLowerCase()),
getAllTokens: () => {
return Array.from(addressToToken.values());
},
};
}
async hasTokenBySymbol(_symbol) {
return this.chainSymbolToTokenInfo.has(this.CHAIN_SYMBOL_KEY(this.chainId, _symbol));
}
async getTokenBySymbol(_symbol) {
let symbol = _symbol;
// We consider ETH as a regular ERC20 Token throughout this package. We don't use the NativeCurrency object from the sdk.
// When we build the calldata for swapping we insert wrapping/unwrapping as needed.
if (_symbol == 'ETH') {
symbol = 'WETH';
}
const tokenInfo = this.chainSymbolToTokenInfo.get(this.CHAIN_SYMBOL_KEY(this.chainId, symbol));
if (!tokenInfo) {
return undefined;
}
const token = await this.buildToken(tokenInfo);
return token;
}
async hasTokenByAddress(address) {
return this.chainAddressToTokenInfo.has(this.CHAIN_ADDRESS_KEY(this.chainId, address));
}
async getTokenByAddress(address) {
const tokenInfo = this.chainAddressToTokenInfo.get(this.CHAIN_ADDRESS_KEY(this.chainId, address));
if (!tokenInfo) {
return undefined;
}
const token = await this.buildToken(tokenInfo);
return token;
}
async buildToken(tokenInfo) {
const cacheKey = this.CACHE_KEY(tokenInfo);
const cachedToken = await this.tokenCache.get(cacheKey);
if (cachedToken) {
return cachedToken;
}
const token = new sdk_core_1.Token(this.chainId, tokenInfo.address, tokenInfo.decimals, tokenInfo.symbol, tokenInfo.name);
await this.tokenCache.set(cacheKey, token);
return token;
}
}
exports.CachingTokenListProvider = CachingTokenListProvider;
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