@lodestar/prover/lib/verified_requests/eth_call.js

A Typescript implementation of the Ethereum Consensus light client

import { bufferToHex } from "../utils/conversion.js";
import { createVM, executeVMCall, getVMWithState } from "../utils/evm.js";
import { getErrorResponseForRequestWithFailedVerification, getResponseForRequest, getVerificationFailedMessage, } from "../utils/json_rpc.js";
export const eth_call = async ({ rpc, payload, logger, proofProvider, }) => {
    const { params: [tx, block], } = payload;
    // We assume that standard tx validation already been done by the caller (web3, ethers.js, etc.)
    const executionPayload = await proofProvider.getExecutionPayload(block ?? "latest");
    try {
        // TODO: Optimize the creation of the evm
        const vm = await createVM({ proofProvider });
        const vmWithState = await getVMWithState({
            rpc,
            executionPayload,
            tx,
            vm,
            logger,
        });
        const result = await executeVMCall({
            vm: vmWithState,
            tx,
            rpc,
            executionPayload,
            network: proofProvider.network,
        });
        return getResponseForRequest(payload, bufferToHex(result.returnValue));
    }
    catch (err) {
        logger.error("Request could not be verified.", { method: payload.method, params: JSON.stringify(payload.params) }, err);
        return getErrorResponseForRequestWithFailedVerification(payload, getVerificationFailedMessage("eth_call"));
    }
};
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