Fantom-foundation/go-lachesis

// Copyright 2015 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 evmcore

import (
    "github.com/ethereum/go-ethereum/core/state"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/core/vm"
)

// Validator is an interface which defines the standard for block validation. It
// is only responsible for validating block contents, as the header validation is
// done by the specific consensus engines.
type Validator interface {
    // ValidateBody validates the given block's content.
    ValidateBody(block *EvmBlock) error

    // ValidateState validates the given statedb and optionally the receipts and
    // gas used.
    ValidateState(block *EvmBlock, state *state.StateDB, receipts types.Receipts, usedGas uint64) error
}

// Prefetcher is an interface for pre-caching transaction signatures and state.
type Prefetcher interface {
    // Prefetch processes the state changes according to the Ethereum rules by running
    // the transaction messages using the statedb, but any changes are discarded. The
    // only goal is to pre-cache transaction signatures and state trie nodes.
    Prefetch(block *EvmBlock, statedb *state.StateDB, cfg vm.Config, interrupt *uint32)
}

// Processor is an interface for processing blocks using a given initial state.
type Processor interface {
    // Process processes the state changes according to the Ethereum rules by running
    // the transaction messages using the statedb and applying any rewards to both
    // the processor (coinbase) and any included uncles.
    Process(block *EvmBlock, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, error)
}