interface.go

// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package vm

import (
	"math/big"

	"go-smilo/src/blockchain/smilobft/core/types"

	"github.com/ethereum/go-ethereum/common"

	"go-smilo/src/blockchain/smilobft/core/state"
)

// SmiloAPIState, used for the Smilo specific StateDB overrides
type SmiloAPIState interface {
	SubBalance(common.Address, *big.Int, *big.Int)
	AddBalance(common.Address, *big.Int, *big.Int)

	GetBalance(addr common.Address) *big.Int
	GetCode(addr common.Address) []byte
	SetCode(common.Address, []byte)

	SetState(addr common.Address, key, value common.Hash)
	SetBalance(addr common.Address, amount, blockNumber *big.Int)
	SetStorage(addr common.Address, storage map[common.Hash]common.Hash)

	GetState(a common.Address, b common.Hash) common.Hash

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

	SubSmiloPay(common.Address, *big.Int, *big.Int)
	AddSmiloPay(common.Address, *big.Int)
	GetSmiloPay(common.Address, *big.Int) *big.Int

	GetProof(common.Address) ([][]byte, error)
	GetStorageProof(common.Address, common.Hash) ([][]byte, error)
	StorageTrie(addr common.Address) state.Trie
	Error() error
	GetCodeHash(common.Address) common.Hash
}

// StateDB is an EVM database for full state querying.
type StateDB interface {
	SmiloAPIState
	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

	RevertToSnapshot(int)
	Snapshot() int

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

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

// CallContext provides a basic interface for the EVM calling conventions. The EVM
// depends on this context being implemented for doing subcalls and initialising new EVM contracts.
type CallContext interface {
	// Call another contract
	Call(env *EVM, me ContractRef, addr common.Address, data []byte, gas, value *big.Int) ([]byte, error)
	// Take another's contract code and execute within our own context
	CallCode(env *EVM, me ContractRef, addr common.Address, data []byte, gas, value *big.Int) ([]byte, error)
	// Same as CallCode except sender and value is propagated from parent to child scope
	DelegateCall(env *EVM, me ContractRef, addr common.Address, data []byte, gas *big.Int) ([]byte, error)
	// Create a new contract
	Create(env *EVM, me ContractRef, data []byte, gas, value *big.Int) ([]byte, common.Address, error)
}