@xspswap/smart-order-router
Version:
XSwap Protocol V3 Smart Order Router
114 lines • 10.7 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.CachingTokenProviderWithFallback = exports.CACHE_SEED_TOKENS = void 0;
const sdk_core_1 = require("@x-swap-protocol/sdk-core");
const lodash_1 = __importDefault(require("lodash"));
const util_1 = require("../util");
const token_provider_1 = require("./token-provider");
// These tokens will added to the Token cache on initialization.
exports.CACHE_SEED_TOKENS = {
[sdk_core_1.ChainId.APOTHEM]: {
USDC: token_provider_1.USDC_XDC_APOTHEM,
USDT: token_provider_1.USDT_XDC_APOTHEM,
DAI: token_provider_1.DAI_XDC_APOTHEM,
WXDC: sdk_core_1.WETH9[sdk_core_1.ChainId.APOTHEM],
},
[sdk_core_1.ChainId.XDC]: {
USDC: token_provider_1.USDC_XDC,
WXDC: sdk_core_1.WETH9[sdk_core_1.ChainId.XDC],
},
// Currently we do not have providers for Moonbeam mainnet or Gnosis testnet
};
/**
* Provider for getting token metadata that falls back to a different provider
* in the event of failure.
*
* @export
* @class CachingTokenProviderWithFallback
*/
class CachingTokenProviderWithFallback {
constructor(chainId,
// Token metadata (e.g. symbol and decimals) don't change so can be cached indefinitely.
// Constructing a new token object is slow as sdk-core does checksumming.
tokenCache, primaryTokenProvider, fallbackTokenProvider) {
this.chainId = chainId;
this.tokenCache = tokenCache;
this.primaryTokenProvider = primaryTokenProvider;
this.fallbackTokenProvider = fallbackTokenProvider;
this.CACHE_KEY = (chainId, address) => `token-${chainId}-${address}`;
}
async getTokens(_addresses) {
const seedTokens = exports.CACHE_SEED_TOKENS[this.chainId];
if (seedTokens) {
for (const token of Object.values(seedTokens)) {
await this.tokenCache.set(this.CACHE_KEY(this.chainId, token.address.toLowerCase()), token);
}
}
const addressToToken = {};
const symbolToToken = {};
const addresses = (0, lodash_1.default)(_addresses)
.map((address) => address.toLowerCase())
.uniq()
.value();
const addressesToFindInPrimary = [];
const addressesToFindInSecondary = [];
for (const address of addresses) {
if (await this.tokenCache.has(this.CACHE_KEY(this.chainId, address))) {
addressToToken[address.toLowerCase()] = (await this.tokenCache.get(this.CACHE_KEY(this.chainId, address)));
symbolToToken[addressToToken[address].symbol] =
(await this.tokenCache.get(this.CACHE_KEY(this.chainId, address)));
}
else {
addressesToFindInPrimary.push(address);
}
}
util_1.log.info({ addressesToFindInPrimary }, `Found ${addresses.length - addressesToFindInPrimary.length} out of ${addresses.length} tokens in local cache. ${addressesToFindInPrimary.length > 0
? `Checking primary token provider for ${addressesToFindInPrimary.length} tokens`
: ``}
`);
if (addressesToFindInPrimary.length > 0) {
const primaryTokenAccessor = await this.primaryTokenProvider.getTokens(addressesToFindInPrimary);
for (const address of addressesToFindInPrimary) {
const token = primaryTokenAccessor.getTokenByAddress(address);
if (token) {
addressToToken[address.toLowerCase()] = token;
symbolToToken[addressToToken[address].symbol] = token;
await this.tokenCache.set(this.CACHE_KEY(this.chainId, address.toLowerCase()), addressToToken[address]);
}
else {
addressesToFindInSecondary.push(address);
}
}
util_1.log.info({ addressesToFindInSecondary }, `Found ${addressesToFindInPrimary.length - addressesToFindInSecondary.length} tokens in primary. ${this.fallbackTokenProvider
? `Checking secondary token provider for ${addressesToFindInSecondary.length} tokens`
: `No fallback token provider specified. About to return.`}`);
}
if (this.fallbackTokenProvider && addressesToFindInSecondary.length > 0) {
const secondaryTokenAccessor = await this.fallbackTokenProvider.getTokens(addressesToFindInSecondary);
for (const address of addressesToFindInSecondary) {
const token = secondaryTokenAccessor.getTokenByAddress(address);
if (token) {
addressToToken[address.toLowerCase()] = token;
symbolToToken[addressToToken[address].symbol] = token;
await this.tokenCache.set(this.CACHE_KEY(this.chainId, address.toLowerCase()), addressToToken[address]);
}
}
}
return {
getTokenByAddress: (address) => {
return addressToToken[address.toLowerCase()];
},
getTokenBySymbol: (symbol) => {
return symbolToToken[symbol.toLowerCase()];
},
getAllTokens: () => {
return Object.values(addressToToken);
},
};
}
}
exports.CachingTokenProviderWithFallback = CachingTokenProviderWithFallback;
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FXLEVBQUUsQ0FBQyxDQUFDO1lBQzdDLENBQUM7WUFDRCxZQUFZLEVBQUUsR0FBWSxFQUFFO2dCQUMxQixPQUFPLE1BQU0sQ0FBQyxNQUFNLENBQUMsY0FBYyxDQUFDLENBQUM7WUFDdkMsQ0FBQztTQUNGLENBQUM7SUFDSixDQUFDO0NBQ0Y7QUExSEQsNEVBMEhDIn0=