Allow larger gas limit in non-transactional execution

[nanocryk]

Infura allows to use eth_call/eth_estimateGas with up to 10x the block gas limit:
https://docs.infura.io/infura/networks/ethereum/json-rpc-methods/eth_call

To replicate this feature :

• Runtime gas limit check is made only if call is transactional.
• Client RPC have a configurable factor, and will ensure the requested gas limit is less than the block gas limit times the factor.

[tgmichel]

lgtm aside from the suggestion. Also, can you please add tests for it?

[nanocryk]

Changing the limit for estimateGas changes the estimation. Do we want to avoid that? Also, while I can see the point of having for exemple 10x for eth_call (perform calculations that is meant to be done off-chain), I don't see the point of estimating more than the block gas limit since you're mainly estimating to make a transaction with it.

What do you think @tgmichel @albertov19 @sorpaas ? Should it be only increased for eth_call ?

[albertov19]

Changing the limit for estimateGas changes the estimation. Do we want to avoid that? Also, while I can see the point of having for exemple 10x for eth_call (perform calculations that is meant to be done off-chain), I don't see the point of estimating more than the block gas limit since you're mainly estimating to make a transaction with it.

What do you think @tgmichel @albertov19 @sorpaas ? Should it be only increased for eth_call ?

I've tried both Alchemy and Infura API (I think both run GETH Clients) and they accept 50M gas units for gas field in the JSON RPC payload. I understand it is a bit pointless but 🤷

[albertov19]

Moreover, eth_estimateGas did not change the return value when specifying different values as gas (500M, 200M, 50M, 100000). Alchemy has a similar thin in their docs, where they say the limit gas in eth_call and eth_estimateGas to 550M.