@uniswap/smart-order-router
Version:
Uniswap Smart Order Router
37 lines • 2.26 kB
JavaScript
import { TickBasedHeuristicGasModelFactory } from '../tick-based-heuristic-gas-model';
/**
* Computes a gas estimate for a V3 swap using heuristics.
* Considers number of hops in the route, number of ticks crossed
* and the typical base cost for a swap.
*
* We get the number of ticks crossed in a swap from the QuoterV2
* contract.
*
* We compute gas estimates off-chain because
* 1/ Calling eth_estimateGas for a swaps requires the caller to have
* the full balance token being swapped, and approvals.
* 2/ Tracking gas used using a wrapper contract is not accurate with Multicall
* due to EIP-2929. We would have to make a request for every swap we wanted to estimate.
* 3/ For V2 we simulate all our swaps off-chain so have no way to track gas used.
*
* @export
* @class V3HeuristicGasModelFactory
*/
export class V3HeuristicGasModelFactory extends TickBasedHeuristicGasModelFactory {
constructor(provider) {
super(provider);
}
async buildGasModel({ chainId, gasPriceWei, pools, amountToken, quoteToken, v2poolProvider, l2GasDataProvider, providerConfig, }) {
return await super.buildGasModelInternal({
chainId,
gasPriceWei,
pools,
amountToken,
quoteToken,
v2poolProvider,
l2GasDataProvider,
providerConfig,
});
}
}
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