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evm.go
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evm.go
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package evm
import (
"github.com/onflow/cadence/runtime"
"github.com/onflow/cadence/runtime/common"
"github.com/onflow/flow-go/fvm/environment"
"github.com/onflow/flow-go/fvm/evm/backends"
evm "github.com/onflow/flow-go/fvm/evm/emulator"
"github.com/onflow/flow-go/fvm/evm/handler"
"github.com/onflow/flow-go/fvm/evm/stdlib"
"github.com/onflow/flow-go/fvm/systemcontracts"
"github.com/onflow/flow-go/model/flow"
)
func ContractAccountAddress(chainID flow.ChainID) (flow.Address, error) {
sc := systemcontracts.SystemContractsForChain(chainID)
return sc.EVMContract.Address, nil
}
func StorageAccountAddress(chainID flow.ChainID) (flow.Address, error) {
sc := systemcontracts.SystemContractsForChain(chainID)
return sc.EVMStorage.Address, nil
}
func SetupEnvironment(
chainID flow.ChainID,
fvmEnv environment.Environment,
runtimeEnv runtime.Environment,
service flow.Address,
flowToken flow.Address,
) error {
evmStorageAccountAddress, err := StorageAccountAddress(chainID)
if err != nil {
return err
}
evmContractAccountAddress, err := ContractAccountAddress(chainID)
if err != nil {
return err
}
backend := backends.NewWrappedEnvironment(fvmEnv)
em := evm.NewEmulator(backend, evmStorageAccountAddress)
bs := handler.NewBlockStore(backend, evmStorageAccountAddress)
aa := handler.NewAddressAllocator()
contractHandler := handler.NewContractHandler(chainID, evmContractAccountAddress, common.Address(flowToken), bs, aa, backend, em)
stdlib.SetupEnvironment(runtimeEnv, contractHandler, evmContractAccountAddress)
return nil
}