@xspswap/smart-order-router
Version:
XSwap Protocol V3 Smart Order Router
123 lines • 11.8 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CachingTokenListProvider = void 0;
/* eslint-disable @typescript-eslint/no-non-null-assertion */
const sdk_core_1 = require("@x-swap-protocol/sdk-core");
const axios_1 = __importDefault(require("axios"));
const lodash_1 = __importDefault(require("lodash"));
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.chainId = chainId;
this.tokenList = tokenList;
this.chainToTokenInfos = lodash_1.default.reduce(this.tokenList.tokens, (result, tokenInfo) => {
const chainId = tokenInfo.chainId.toString();
if (!result[chainId]) {
result[chainId] = [];
}
result[chainId].push(tokenInfo);
return result;
}, {});
this.chainSymbolToTokenInfo = lodash_1.default.mapValues(this.chainToTokenInfos, (tokenInfos) => lodash_1.default.keyBy(tokenInfos, 'symbol'));
this.chainAddressToTokenInfo = lodash_1.default.mapValues(this.chainToTokenInfos, (tokenInfos) => lodash_1.default.keyBy(tokenInfos, (tokenInfo) => tokenInfo.address.toLowerCase()));
}
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;
}
async getTokens(_addresses) {
const addressToToken = {};
const symbolToToken = {};
for (const address of _addresses) {
const token = await this.getTokenByAddress(address);
if (!token) {
continue;
}
addressToToken[address.toLowerCase()] = token;
if (!token.symbol) {
continue;
}
symbolToToken[token.symbol.toLowerCase()] = token;
}
return {
getTokenByAddress: (address) => addressToToken[address.toLowerCase()],
getTokenBySymbol: (symbol) => symbolToToken[symbol.toLowerCase()],
getAllTokens: () => {
return Object.values(addressToToken);
},
};
}
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';
}
if (!this.chainSymbolToTokenInfo[this.chainId.toString()]) {
return undefined;
}
const tokenInfo = this.chainSymbolToTokenInfo[this.chainId.toString()][symbol];
if (!tokenInfo) {
return undefined;
}
const token = await this.buildToken(tokenInfo);
return token;
}
async getTokenByAddress(address) {
if (!this.chainAddressToTokenInfo[this.chainId.toString()]) {
return undefined;
}
const tokenInfo = this.chainAddressToTokenInfo[this.chainId.toString()][address.toLowerCase()];
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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