Drop> This variant should be checked in `TransactionArgs.ToMessage`. I'm surprised it's still failing.

[Ger6662017]

          > This variant should be checked in `TransactionArgs.ToMessage`. I'm surprised it's still failing.

because of this in ToMessage:

	if args.Gas != nil {
		gas = uint64(*args.Gas)
	}

the pre-handling to set args.Gas as 0 activates this if, thus the gas limit is wrongly set as 0. code:

		tmp := hexutil.Uint64(b.RPCGasCap())
		args.Gas = &tmp

btw, which do you think is better as a default value, the block gas limit or uint64(math.MaxUint64 / 2) like in ToMessage?

Originally posted by @colinlyguo in #28846 (comment)

### Tasks
- [ ] https://github.com/ethereum/go-ethereum/pull/29115
- [ ] https://github.com/ethereum/go-ethereum/pull/29089

[Ger6662017]

Drop