TOMO + EVMC6 + HERA #9
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Jun 6, 2019
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- Define an Interpreter interface - One contract can call contracts from other interpreter types. - Pass the interpreter to the operands instead of the evm. This is meant to prevent type assertions in operands.
Interpreter initialization is left to the PRs implementing them. Options for external interpreters are passed after a colon in the `--vm.ewasm` and `--vm.evm` switches.
govendor fetch github.com/ethereum/evmc/bindings/go/evmc@=v6.0.2
Makes Interface interface a bit more stateless and abstract. Obviously this change is dictated by EVMC design. The EVMC tries to keep the responsibility for EVM features totally inside the VMs, if feasible. This makes VM "stateless" because VM does not need to pass any information between executions, all information is included in parameters of the execute function.
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Ref: ethereum#17954
In this case the built library will be placed at build/src/libhera/libhera.so on Linux or build/src/libhera/libhera.dylib on MacOS.
engine=<engine>will select the underlying WebAssembly engine, where the only accepted values currently arebinaryen,wabt, andwavmrejectwill reject any EVM1 bytecode with an error (the default setting)fallbackwill allow EVM1 bytecode to be passed through to the client for executionevm2wasmwill enable transformation of bytecode using the EVM Transcompilerrunevmwill transform EVM1 bytecode using runevmAdditional EVMC options can be provided after a comma. Hera options are documented here