quickswap-smart-order-router/build/main/providers/on-chain-gas-price-provider.js

QuickSwap Smart Order Router

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.OnChainGasPriceProvider = void 0;
const chains_1 = require("../util/chains");
const gas_price_provider_1 = require("./gas-price-provider");
const DEFAULT_EIP_1559_SUPPORTED_CHAINS = [
    chains_1.ChainId.MAINNET,
    chains_1.ChainId.RINKEBY,
    chains_1.ChainId.ROPSTEN,
    chains_1.ChainId.GÖRLI,
    chains_1.ChainId.POLYGON,
    chains_1.ChainId.POLYGON_MUMBAI,
    // infura endpoint having difficulty w/ eip-1559 on kovan
    // ChainId.KOVAN,
];
/**
 * Gets gas prices on chain. If the chain supports EIP-1559 and has the feeHistory API,
 * uses the EIP1559 provider. Otherwise it will use a legacy provider that uses eth_gasPrice
 *
 * @export
 * @class OnChainGasPriceProvider
 */
class OnChainGasPriceProvider extends gas_price_provider_1.IGasPriceProvider {
    constructor(chainId, eip1559GasPriceProvider, legacyGasPriceProvider, eipChains = DEFAULT_EIP_1559_SUPPORTED_CHAINS) {
        super();
        this.chainId = chainId;
        this.eip1559GasPriceProvider = eip1559GasPriceProvider;
        this.legacyGasPriceProvider = legacyGasPriceProvider;
        this.eipChains = eipChains;
    }
    async getGasPrice() {
        if (this.eipChains.includes(this.chainId)) {
            return this.eip1559GasPriceProvider.getGasPrice();
        }
        return this.legacyGasPriceProvider.getGasPrice();
    }
}
exports.OnChainGasPriceProvider = OnChainGasPriceProvider;
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