UNPKG

@sky-mavis/smart-order-router

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import _ from 'lodash'; import { ITokenValidator__factory } from '../types/other/factories/ITokenValidator__factory'; import { log, metric, MetricLoggerUnit, WRAPPED_NATIVE_CURRENCY } from '../util'; export const DEFAULT_ALLOWLIST = new Set([ // RYOSHI. Does not allow transfers between contracts so fails validation. '0x777E2ae845272a2F540ebf6a3D03734A5a8f618e'.toLowerCase(), ]); export var TokenValidationResult; (function (TokenValidationResult) { TokenValidationResult[TokenValidationResult["UNKN"] = 0] = "UNKN"; TokenValidationResult[TokenValidationResult["FOT"] = 1] = "FOT"; TokenValidationResult[TokenValidationResult["STF"] = 2] = "STF"; })(TokenValidationResult || (TokenValidationResult = {})); const TOKEN_VALIDATOR_ADDRESS = '0xb5ee1690b7dcc7859771148d0889be838fe108e0'; const AMOUNT_TO_FLASH_BORROW = '1000'; const GAS_LIMIT_PER_VALIDATE = 1000000; export class TokenValidatorProvider { constructor(chainId, multicall2Provider, tokenValidationCache, tokenValidatorAddress = TOKEN_VALIDATOR_ADDRESS, gasLimitPerCall = GAS_LIMIT_PER_VALIDATE, amountToFlashBorrow = AMOUNT_TO_FLASH_BORROW, allowList = DEFAULT_ALLOWLIST) { this.chainId = chainId; this.multicall2Provider = multicall2Provider; this.tokenValidationCache = tokenValidationCache; this.tokenValidatorAddress = tokenValidatorAddress; this.gasLimitPerCall = gasLimitPerCall; this.amountToFlashBorrow = amountToFlashBorrow; this.allowList = allowList; this.CACHE_KEY = (chainId, address) => `token-${chainId}-${address}`; this.BASES = [WRAPPED_NATIVE_CURRENCY[this.chainId].address]; } async validateTokens(tokens, providerConfig) { const tokenAddressToToken = _.keyBy(tokens, 'address'); const addressesRaw = _(tokens) .map(token => token.address) .uniq() .value(); const addresses = []; const tokenToResult = {}; // Check if we have cached token validation results for any tokens. for (const address of addressesRaw) { if (await this.tokenValidationCache.has(this.CACHE_KEY(this.chainId, address))) { tokenToResult[address.toLowerCase()] = (await this.tokenValidationCache.get(this.CACHE_KEY(this.chainId, address))); metric.putMetric(`TokenValidatorProviderValidateCacheHitResult${tokenToResult[address.toLowerCase()]}`, 1, MetricLoggerUnit.Count); } else { addresses.push(address); } } log.info(`Got token validation results for ${addressesRaw.length - addresses.length} tokens from cache. Getting ${addresses.length} on-chain.`); const functionParams = _(addresses) .map(address => [address, this.BASES, this.amountToFlashBorrow]) .value(); // We use the validate function instead of batchValidate to avoid poison pill problem. // One token that consumes too much gas could cause the entire batch to fail. const multicallResult = await this.multicall2Provider.callSameFunctionOnContractWithMultipleParams({ address: this.tokenValidatorAddress, contractInterface: ITokenValidator__factory.createInterface(), functionName: 'validate', functionParams: functionParams, providerConfig, additionalConfig: { gasLimitPerCallOverride: this.gasLimitPerCall, }, }); for (let i = 0; i < multicallResult.results.length; i++) { const resultWrapper = multicallResult.results[i]; const tokenAddress = addresses[i]; const token = tokenAddressToToken[tokenAddress]; if (this.allowList.has(token.address.toLowerCase())) { tokenToResult[token.address.toLowerCase()] = TokenValidationResult.UNKN; await this.tokenValidationCache.set(this.CACHE_KEY(this.chainId, token.address.toLowerCase()), tokenToResult[token.address.toLowerCase()]); continue; } // Could happen if the tokens transfer consumes too much gas so we revert. Just // drop the token in that case. if (!resultWrapper.success) { metric.putMetric('TokenValidatorProviderValidateFailed', 1, MetricLoggerUnit.Count); log.error({ result: resultWrapper }, `Failed to validate token ${token.symbol}`); continue; } metric.putMetric('TokenValidatorProviderValidateSuccess', 1, MetricLoggerUnit.Count); const validationResult = resultWrapper.result[0]; tokenToResult[token.address.toLowerCase()] = validationResult; await this.tokenValidationCache.set(this.CACHE_KEY(this.chainId, token.address.toLowerCase()), tokenToResult[token.address.toLowerCase()]); metric.putMetric(`TokenValidatorProviderValidateCacheMissResult${validationResult}`, 1, MetricLoggerUnit.Count); } return { getValidationByToken: (token) => tokenToResult[token.address.toLowerCase()], }; } } //# 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