State

// github.com/ethereum/go-ethereum/core/vm/interface.go
type StateDB interface {
	CreateAccount(common.Address)

	SubBalance(common.Address, *big.Int)
	AddBalance(common.Address, *big.Int)
	GetBalance(common.Address) *big.Int

	GetNonce(common.Address) uint64
	SetNonce(common.Address, uint64)

	GetCodeHash(common.Address) common.Hash
	GetCode(common.Address) []byte
	SetCode(common.Address, []byte)
	GetCodeSize(common.Address) int

	AddRefund(uint64)
	SubRefund(uint64)
	GetRefund() uint64

	GetCommittedState(common.Address, common.Hash) common.Hash
	GetState(common.Address, common.Hash) common.Hash
	SetState(common.Address, common.Hash, common.Hash)

	Suicide(common.Address) bool
	HasSuicided(common.Address) bool

	// Exist reports whether the given account exists in state.
	// Notably this should also return true for suicided accounts.
	Exist(common.Address) bool
	// Empty returns whether the given account is empty. Empty
	// is defined according to EIP161 (balance = nonce = code = 0).
	Empty(common.Address) bool

	PrepareAccessList(sender common.Address, dest *common.Address, precompiles []common.Address, txAccesses types.AccessList)
	AddressInAccessList(addr common.Address) bool
	SlotInAccessList(addr common.Address, slot common.Hash) (addressOk bool, slotOk bool)
	// AddAddressToAccessList adds the given address to the access list. This operation is safe to perform
	// even if the feature/fork is not active yet
	AddAddressToAccessList(addr common.Address)
	// AddSlotToAccessList adds the given (address,slot) to the access list. This operation is safe to perform
	// even if the feature/fork is not active yet
	AddSlotToAccessList(addr common.Address, slot common.Hash)

	RevertToSnapshot(int)
	Snapshot() int

	AddLog(*types.Log)
	AddPreimage(common.Hash, []byte)

	ForEachStorage(common.Address, func(common.Hash, common.Hash) bool) error
}

type Keeper struct {
	// Protobuf codec
	cdc          codec.Codec
	// Store key required for the EVM Prefix KVStore. It is required by:
	// - storing account's Storage State
	// - storing account's Code
	// - storing module parameters
	storeKey storetypes.StoreKey

	// key to access the object store, which is reset on every block during Commit
	objectKey storetypes.StoreKey

	// the address capable of executing a MsgUpdateParams message. Typically, this should be the x/gov module account.
	authority sdk.AccAddress
	// access to account state
	accountKeeper types.AccountKeeper
	// update balance and accounting operations with coins
	bankKeeper types.BankKeeper
	// access historical headers for EVM state transition execution
	stakingKeeper types.StakingKeeper
	// fetch EIP1559 base fee and parameters
	feeMarketKeeper types.FeeMarketKeeper

	// chain ID number obtained from the context's chain id
	eip155ChainID *big.Int

	// Tracer used to collect execution traces from the EVM transaction execution
	tracer string

	// EVM Hooks for tx post-processing
	hooks types.EvmHooks

	customContractFns []CustomContractFn
}

type GenesisState struct {
  // accounts is an array containing the ethereum genesis accounts.
  Accounts []GenesisAccount `protobuf:"bytes,1,rep,name=accounts,proto3" json:"accounts"`
  // params defines all the parameters of the module.
  Params Params `protobuf:"bytes,2,opt,name=params,proto3" json:"params"`
}

type GenesisAccount struct {
  // address defines an ethereum hex formated address of an account
  Address string `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
  // code defines the hex bytes of the account code.
  Code string `protobuf:"bytes,2,opt,name=code,proto3" json:"code,omitempty"`
  // storage defines the set of state key values for the account.
  Storage Storage `protobuf:"bytes,3,rep,name=storage,proto3,castrepeated=Storage" json:"storage"`
}