go-ethereum

Commit Graph

Author	SHA1	Message	Date
Martin HS	6d3d252a5e	core/vm/program: evm bytecode-building utility (#30725 ) In many cases, there is a need to create somewhat nontrivial bytecode. A recent example is the verkle statetests, where we want a `CREATE2`- op to create a contract, which can then be invoked, and when invoked does a selfdestruct-to-self. It is overkill to go full solidity, but it is also a bit tricky do assemble this by concatenating bytes. This PR takes an approach that has been used in in goevmlab for several years. Using this utility, the case can be expressed as: ```golang // Some runtime code runtime := program.New().Ops(vm.ADDRESS, vm.SELFDESTRUCT).Bytecode() // A constructor returning the runtime code initcode := program.New().ReturnData(runtime).Bytecode() // A factory invoking the constructor outer := program.New().Create2AndCall(initcode, nil).Bytecode() ``` We have a lot of places in the codebase where we concatenate bytes, cast from `vm.OpCode` . By taking tihs approach instead, thos places can be made a bit more maintainable/robust.	3 months ago

Author

SHA1

Message

Date

Martin HS

6d3d252a5e

core/vm/program: evm bytecode-building utility (#30725 )

In many cases, there is a need to create somewhat nontrivial bytecode. A
recent example is the verkle statetests, where we want a `CREATE2`- op
to create a contract, which can then be invoked, and when invoked does a
selfdestruct-to-self.

It is overkill to go full solidity, but it is also a bit tricky do
assemble this by concatenating bytes. This PR takes an approach that
has been used in in goevmlab for several years.

Using this utility, the case can be expressed as: 
```golang
	// Some runtime code
	runtime := program.New().Ops(vm.ADDRESS, vm.SELFDESTRUCT).Bytecode()
	// A constructor returning the runtime code
	initcode := program.New().ReturnData(runtime).Bytecode()
	// A factory invoking the constructor
	outer := program.New().Create2AndCall(initcode, nil).Bytecode()
```

We have a lot of places in the codebase where we concatenate bytes, cast
from `vm.OpCode` . By taking tihs approach instead, thos places can be made a
bit more maintainable/robust.

3 months ago

1 Commits (71c28d8d2b2049738660a56effcfd0c70f8012d9)