DefenderRelayProvider.send error while verifying signature

kbhargav5 · July 19, 2021, 2:45pm

Getting the below error while verifying the signature,

2021-07-19T14:13:56.332Z ERROR Invoke Error {“errorType”:“Error”,“errorMessage”:“VM execution error.”,“code”:-32015,“data”:“Reverted 0x08c379a00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001d4657443a20756e7265676973746572656420646f6d61696e207365702e000000”,“stack”:[“Error: VM execution error.”," at DefenderRelayProvider.send (/opt/nodejs/node_modules/defender-relay-client/lib/ethers/provider.js:58:31)"," at processTicksAndRejections (internal/process/task_queues.js:97:5)"]}
END RequestId: 67502e6c-e1f2-446b-9a45-ee7eb9c6e262
AUTOTASK COMPLETE

Code to reproduce

I am using OpenGSN forwarder, signature is different from OpenZeppelin MinimalForwarder, so invoking the verify method based on method signature. Verified input parameters to be valid, but getting this error in defender, Is this error from defender?

Environment

spalladino · July 19, 2021, 3:56pm

Hey @kbhargav5! The revert data you got from the contract decodes to an error thrown by the OpenGSN forwarder:

> coder.decode(['string'], '0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001d4657443a20756e7265676973746572656420646f6d61696e207365702e000000')
[ 'FWD: unregistered domain sep.' ]

github.com

opengsn/gsn/blob/e961c4cc8bc4c79b82a9f63c42124346013170ff/packages/contracts/src/forwarder/Forwarder.sol#L133

    
      
          
          
function _verifySig(
              ForwardRequest calldata req,
              bytes32 domainSeparator,
              bytes32 requestTypeHash,
              bytes calldata suffixData,
              bytes calldata sig)
          internal
          view
          {
              require(domains[domainSeparator], "FWD: unregistered domain sep.");
              require(typeHashes[requestTypeHash], "FWD: unregistered typehash");
              bytes32 digest = keccak256(abi.encodePacked(
                      "\x19\x01", domainSeparator,
                      keccak256(_getEncoded(req, requestTypeHash, suffixData))
                  ));
              require(digest.recover(sig) == req.from, "FWD: signature mismatch");
          }
          
          
function _getEncoded(
              ForwardRequest calldata req,

I’d suggest you reach out to the OpenGSN team for help with this one!

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DefenderRelayProvider.send error while verifying signature

Code to reproduce

Environment

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