feat request: Add script action

[roninjin10]

Problem

Sometimes users want to run contract bytecode. This is possible to do both with tevm and viem, but >90% of users will not know you can do this with viem. Most users will go through the effort of spinning up a backend without even realizing they can do it with viem.

Solution

Add viem.script or alternatively viem.callWithBytecode or viem.runBytecode action for specifically this (I prefer viem.script)

How does it work

To run arbitrary bytecode you simply need to do following:

• Generate a random address to deploy the bytecode
• Do an eth_call to that random address with state overrides

[roninjin10]

ts-playground

1. tevmScript which is similar to this
2. Same result via eth_call

https://www.typescriptlang.org/play/?target=7#code/JYWwDg9gTgLgBAbzgYygUwIYzQWTSaATwGEAbYNAO3gF84AzKCEOAImwDcRWBuAKFCRYiOABM0AZ1TAARmgA0cNAA8waZDEXBaDJi1YdtkmLwHho8JABVjAUQBKxAEwAGOHUbM2AAU4gA9NgSMAC0AK4wwKQSpoIWIqiY2AAKYTLkyGQU1IpUyBDiAGJhlBrAEJQAIlgYigAWMDBg7rpeBhTc-HHCSIlYaADKaFAcwy2e+n7+EsOjUKZ84lJQsmgAFKwq6hFocBgoGKSkcADu2nVwMoTY+eJwwJRwIBiUhGLA9PTDVPAnGIQxRRrACUcAAvAA+RB8OD3GAbZAvMQQOAwOrACSnc6otBcViKDASQilOAg8FQhAw2EoCrBFDkH7glDofp4AhQEgM6gg-hU2H5Sh09CYsF7P7aenZGAAOj8A2kYHhlOp1IwMmAAC44DZgg5nC5pWrgPI+dTxGBSBBCGhRAAha7qApoLU6mB61zS82W612h23BSm2H0EplCoAOQwIGdbBkhxeyDQAHl6PjA3soABzCRagDaAAMXMoACQIVguFysaXoNRYNauYE0PMAXRNKpowN5KpUag0a2FwNlEFsAEcwoc1sqVXsCCUYAM1NQtQBGABsAA4AMwuJeUVtTvrYUQAQVEomFM2zcEoaBOcCG8OBe5VohqWpcu7TW2QEXKlAA4oSACqMyiFqThrgArDuT7UhmhJgQAnAhADsEEIRByEflOcCWlmuYtmmUAYCc1QwBgGpprCZbKOWtF0fRDGMUxzEsSxqbYTMpD0EsMBQGEGhatet73iCMGwjAEBkaQAESPOPxgQALC4Ckblh1LtvwsIaXwVLaAiSKiCiaIYliaJwME-RwBAcwrEs+J7ESJJkpC0Iqv4-iouimKIo8ch7KQyB1PgbwPMEmCiKaAp0jMIxjKKxEYBKB6DLMwxrMlbJEFkPwgh2OkqglEpCXAyR6BiaAADwcBAwCiBCax9pIECkKMoIuTFczSuQYWUGsK4If1QJtVCwrNaMuV5ZFtLwMgXLwKKyWpOkwCZHNE5prxLwSEIMBag0TQbPtYAau5lqIqQdQQMEGr9f1rCPqa2lTYKM0VJtGgnmekginABbFqWd1VmgNbwvWjYOTSL2dqq4ozXNQOjsY63YVGaIFFqmxogA+udpDsVOYAYERICXjmlGudh1ISVqArvTAn3nmJU4vmRWp5E6xSlJEFSkRgyOUwV6ounYjgekaTPYcGXO-hGUYY7GpDxkmKYS1ORN4XA+aFiWZYVkDIN1i4DbNqrWkPQLNCq6witBCYquTgLOa00RH2nueTZag7As0uIwu6qLBpelaNr2jcTqm9SCtKxjhYVhHsKUBUCYxzR+Pe+ZElERm0Ze+nWv-brlbVkkfUKcbHvkwL1GsTXtd17XGBp97luV+4qst9hBFtnlZv8NpQA

[roninjin10]

So this chagnes my opinion on how this would be implemented: https://github.com/wevm/viem/pull/2405/files#diff-5c348edc08dfc2e4da2ade593c248ed35d97338797d68790f4d863ac1b2b7eceR38
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I think since you overloaded this functionality into call then what I'm proposing should also be overloaded. That would mean just adding code as an option to call and then also adding code as an option to readContract

the action I proposed then would just be readContract({code, abi, args, functionData}) rather than script({code, abi, args, functionData}).

In which case I would go ahead and do the breaking change immediately to remove tevmScript from tevm for a similar pattern