@unruggable/gateways/dist/esm/linea/LineaGatewayV1.mjs

Trustless Ethereum Multichain CCIP-Read Gateway

import { isInclusionProof } from './types.mjs';
import { GatewayV1 } from '../gateway.mjs';
import { ABI_CODER } from '../utils.mjs';
import { requireV1Needs } from '../vm.mjs';
// https://github.com/Consensys/linea-ens/blob/main/packages/linea-ccip-gateway/src/L2ProofService.ts
// the deployed linea verifier is not compatible with the current gateway design
// due to strange proof encoding: incorrect negative proofs + unnecessary data (key)
export class LineaGatewayV1 extends GatewayV1 {
    async handleRequest(commit, request) {
        const state = await commit.prover.evalRequest(request.v2());
        const { target, slots } = requireV1Needs(state.needs);
        const proofs = await commit.prover.getProofs(target, slots);
        if (!isInclusionProof(proofs.accountProof)) {
            throw new Error(`not a contract: ${request.target}`);
        }
        const witness = ABI_CODER.encode([
            'uint256',
            '(address, uint256, (bytes, bytes[]))',
            '(bytes32, uint256, (bytes32, bytes[]), bool)[]',
        ], [
            commit.index,
            encodeAccountProof(proofs.accountProof),
            proofs.storageProofs.map(encodeStorageProof),
        ]);
        return ABI_CODER.encode(['bytes'], [witness]);
    }
}
function encodeAccountProof(proof) {
    return [
        proof.key,
        proof.leafIndex,
        [proof.proof.value, proof.proof.proofRelatedNodes],
    ];
}
function encodeStorageProof(proof) {
    return isInclusionProof(proof)
        ? [
            proof.key,
            proof.leafIndex,
            [proof.proof.value, proof.proof.proofRelatedNodes],
            true,
        ]
        : [
            proof.key,
            proof.leftLeafIndex,
            [proof.leftProof.value, proof.leftProof.proofRelatedNodes],
            false,
        ];
}