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Adds revert reason on eth_call and simulatedBackend #1410

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mcortesi wants to merge 3 commits into from
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Adds revert reason on eth_call and simulatedBackend #1410

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e92d9b1
get revert reason when using simulated backend
mcortesi Mar 1, 2021
9afad53
Return revert reason on eth_call
mcortesi Mar 2, 2021
dc722d4
Refactors if-else to go preferred style
mcortesi Mar 3, 2021
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10 changes: 10 additions & 0 deletions accounts/abi/bind/backends/simulated.go
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Original file line number Diff line number Diff line change
Expand Up @@ -350,6 +350,16 @@ func (b *SimulatedBackend) CallContract(ctx context.Context, call ethereum.CallM
return nil, err
}
res, err := b.callContract(ctx, call, b.blockchain.CurrentBlock(), state)

if res != nil && res.Err != vm.ErrOutOfGas {
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if len(res.Revert()) > 0 {
if ret, err := abi.UnpackRevert(res.Revert()); err == nil {
return nil, fmt.Errorf("execution reverted: %s", ret)
}
return nil, fmt.Errorf("execution reverted: %#x", res.Revert())
}
}

if err != nil {
return nil, err
}
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9 changes: 9 additions & 0 deletions internal/ethapi/api.go
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Original file line number Diff line number Diff line change
Expand Up @@ -878,6 +878,15 @@ func (s *PublicBlockChainAPI) Call(ctx context.Context, args CallArgs, blockNrOr
if err != nil {
return nil, err
}

if result != nil && result.Err != vm.ErrOutOfGas {
if len(result.Revert()) > 0 {
if ret, err := abi.UnpackRevert(result.Revert()); err == nil {
return nil, fmt.Errorf("execution reverted: %s", ret)
}
return nil, fmt.Errorf("execution reverted: %#x", result.Revert())
}
}
return result.Return(), nil
}

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