1// Copyright 2015 The go-ethereum Authors
2// This file is part of the go-ethereum library.
3//
4// The go-ethereum library is free software: you can redistribute it and/or modify
5// it under the terms of the GNU Lesser General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// The go-ethereum library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU Lesser General Public License for more details.
13//
14// You should have received a copy of the GNU Lesser General Public License
15// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
16
17package core
18
19import (
20	"github.com/ethereum/go-ethereum/core/state"
21	"github.com/ethereum/go-ethereum/core/types"
22	"github.com/ethereum/go-ethereum/core/vm"
23)
24
25// Validator is an interface which defines the standard for block validation. It
26// is only responsible for validating block contents, as the header validation is
27// done by the specific consensus engines.
28type Validator interface {
29	// ValidateBody validates the given block's content.
30	ValidateBody(block *types.Block) error
31
32	// ValidateState validates the given statedb and optionally the receipts and
33	// gas used.
34	ValidateState(block *types.Block, state *state.StateDB, receipts types.Receipts, usedGas uint64) error
35}
36
37// Prefetcher is an interface for pre-caching transaction signatures and state.
38type Prefetcher interface {
39	// Prefetch processes the state changes according to the Ethereum rules by running
40	// the transaction messages using the statedb, but any changes are discarded. The
41	// only goal is to pre-cache transaction signatures and state trie nodes.
42	Prefetch(block *types.Block, statedb *state.StateDB, cfg vm.Config, interrupt *uint32)
43}
44
45// Processor is an interface for processing blocks using a given initial state.
46type Processor interface {
47	// Process processes the state changes according to the Ethereum rules by running
48	// the transaction messages using the statedb and applying any rewards to both
49	// the processor (coinbase) and any included uncles.
50	Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, error)
51}
52