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feat!: use full EVM execution stack and simplify interception of byte…
…code, config, `StateDB`, etc. (#35) * feat!: use `core.ApplyMessage()` and full `state.StateDB` for `Run()` (messy!) * doc: comment all `runopts.Captured` functionality (and move it to a separate file) * refactor: default `Code.Run()` to error on revert "Make it hard to misuse an API". The majority of tests were using `runopts.ErrorOnRevert()` and one even forgot it, so the option is inverted to `NoErrorOnRevert()`. * doc: comment all `runopts.Option`s * chore: nolint errcheck for reading from Keccak state * doc: default `Contract.Address` and guarantees/reqs about `vm.StateDB` * doc: README updates * fix: add contract address to `StateDB` access list * test: `ExampleCaptured` also demonstrates testing `SSTORE`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| load("@rules_go//go:def.bzl", "go_library") | ||
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| go_library( | ||
| name = "revert", | ||
| srcs = ["revert.go"], | ||
| importpath = "github.com/solidifylabs/specops/revert", | ||
| visibility = ["//visibility:public"], | ||
| deps = ["@com_github_ethereum_go_ethereum//core"], | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // Package revert provides errors and error handling for EVM smart contracts | ||
| // that revert. | ||
| package revert | ||
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||
| import ( | ||
| "errors" | ||
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| "github.com/ethereum/go-ethereum/core" | ||
| ) | ||
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| // An Error is an error signalling that code reverted. | ||
| type Error struct { | ||
| Data []byte // [core.ExecutionResult.Revert()] | ||
| Err error // [core.ExecutionResult.Err] | ||
| } | ||
|
|
||
| // Data returns the revert data from the error if it is an [Error]. The returned | ||
| // boolean indicates whether the possibly zero-length data was found; similar to | ||
| // the second return value from a map. | ||
| func Data(err error) (_ []byte, ok bool) { | ||
| e := new(Error) | ||
| if !errors.As(err, &e) { | ||
| return nil, false | ||
| } | ||
| return e.Data, true | ||
| } | ||
|
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||
| // ErrFrom converts a [core.ExecutionResult] into an error, or nil if the | ||
| // execution completely successfully. The returned error is non-nil i.f.f. | ||
| // r.Failed() is true. | ||
| func ErrFrom(r *core.ExecutionResult) error { | ||
| if !r.Failed() { | ||
| return nil | ||
| } | ||
| return &Error{ | ||
| Data: r.Revert(), | ||
| Err: r.Err, | ||
| } | ||
| } | ||
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| var _ error = (*Error)(nil) | ||
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| // Error returns the error string from the [core.ExecutionResult.Err]. | ||
| func (e *Error) Error() string { | ||
| return e.Err.Error() | ||
| } | ||
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| // Unwrap returns the wrapped [core.ExecutionResult.Err] value. | ||
| func (e *Error) Unwrap() error { | ||
| return e.Err | ||
| } |
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