safeCopyInputs

[zsystm]

We should apply the following to every places where are using method.Inputs.Copy(&input, args) to avoid panic during parsing precompile's inputs.

evm/precompiles/ics20/types.go

Lines 233 to 243 in 0e511d3

	// safeCopyInputs is a helper function to safely copy inputs from the method to the args.
	// It recovers from any panic that might occur during the copy operation and returns an error instead.
	func safeCopyInputs(method *abi.Method, args []interface{}, pageRequest *PageRequest) (err error) {
	defer func() {
	if r := recover(); r != nil {
	err = fmt.Errorf("panic during method.Inputs.Copy: %v", r)
	}
	}()
	err = method.Inputs.Copy(pageRequest, args)
	return
	}

[linear]

EVM-143 safeCopy

[yihuang]

An alternative is to develop state-machine friendly abi parsing utilities.

[yihuang]

https://github.com/yihuang/go-abi
this is designed for efficient execution without panic behavior, can be used for precompiles.