1 files changed, 51 insertions, 0 deletions
diff --git a/core/types.go b/core/types.go
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+++ b/core/types.go
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+// 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 core
+
+import (
+	"github.com/ava-labs/go-ethereum/core/state"
+	"github.com/ava-labs/go-ethereum/core/types"
+	"github.com/ava-labs/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 *types.Block) error
+
+	// ValidateState validates the given statedb and optionally the receipts and
+	// gas used.
+	ValidateState(block *types.Block, 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 *types.Block, 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 *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, error)
+}