consensus, core, ethstats: use engine specific block beneficiary (#14318)

* consensus, core, ethstats: use engine specific block beneficiary

* core, eth, les, miner: use explicit beneficiary during mining

core/blockchain.go

@@ -1398,3 +1398,6 @@ func (self *BlockChain) GetHeaderByNumber(number uint64) *types.Header {
 
 // Config retrieves the blockchain's chain configuration.
 func (self *BlockChain) Config() *params.ChainConfig { return self.config }
+
+// Engine retrieves the blockchain's consensus engine.
+func (self *BlockChain) Engine() consensus.Engine { return self.engine }

core/chain_makers.go

@@ -85,7 +85,7 @@ func (b *BlockGen) AddTx(tx *types.Transaction) {
 		b.SetCoinbase(common.Address{})
 	}
 	b.statedb.StartRecord(tx.Hash(), common.Hash{}, len(b.txs))
-	receipt, _, err := ApplyTransaction(b.config, nil, b.gasPool, b.statedb, b.header, tx, b.header.GasUsed, vm.Config{})
+	receipt, _, err := ApplyTransaction(b.config, nil, &b.header.Coinbase, b.gasPool, b.statedb, b.header, tx, b.header.GasUsed, vm.Config{})
 	if err != nil {
 		panic(err)
 	}

core/evm.go

@@ -20,25 +20,36 @@ import (
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/consensus"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 )
 
-// BlockFetcher retrieves headers by their hash
-type HeaderFetcher interface {
-	// GetHeader returns the hash corresponding to their hash
+// ChainContext supports retrieving headers and consensus parameters from the
+// current blockchain to be used during transaction processing.
+type ChainContext interface {
+	// Engine retrieves the chain's consensus engine.
+	Engine() consensus.Engine
+
+	// GetHeader returns the hash corresponding to their hash.
 	GetHeader(common.Hash, uint64) *types.Header
 }
 
 // NewEVMContext creates a new context for use in the EVM.
-func NewEVMContext(msg Message, header *types.Header, chain HeaderFetcher) vm.Context {
+func NewEVMContext(msg Message, header *types.Header, chain ChainContext, author *common.Address) vm.Context {
+	// If we don't have an explicit author (i.e. not mining), extract from the header
+	var beneficiary common.Address
+	if author == nil {
+		beneficiary, _ = chain.Engine().Author(header) // Ignore error, we're past header validation
+	} else {
+		beneficiary = *author
+	}
 	return vm.Context{
 		CanTransfer: CanTransfer,
 		Transfer:    Transfer,
 		GetHash:     GetHashFn(header, chain),
-
 		Origin:      msg.From(),
-		Coinbase:    header.Coinbase,
+		Coinbase:    beneficiary,
 		BlockNumber: new(big.Int).Set(header.Number),
 		Time:        new(big.Int).Set(header.Time),
 		Difficulty:  new(big.Int).Set(header.Difficulty),
@@ -48,7 +59,7 @@ func NewEVMContext(msg Message, header *types.Header, chain HeaderFetcher) vm.Co
 }
 
 // GetHashFn returns a GetHashFunc which retrieves header hashes by number
-func GetHashFn(ref *types.Header, chain HeaderFetcher) func(n uint64) common.Hash {
+func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash {
 	return func(n uint64) common.Hash {
 		for header := chain.GetHeader(ref.ParentHash, ref.Number.Uint64()-1); header != nil; header = chain.GetHeader(header.ParentHash, header.Number.Uint64()-1) {
 			if header.Number.Uint64() == n {

core/headerchain.go

@@ -442,6 +442,9 @@ func (hc *HeaderChain) SetGenesis(head *types.Header) {
 // Config retrieves the header chain's chain configuration.
 func (hc *HeaderChain) Config() *params.ChainConfig { return hc.config }
 
+// Engine retrieves the header chain's consensus engine.
+func (hc *HeaderChain) Engine() consensus.Engine { return hc.engine }
+
 // GetBlock implements consensus.ChainReader, and returns nil for every input as
 // a header chain does not have blocks available for retrieval.
 func (hc *HeaderChain) GetBlock(hash common.Hash, number uint64) *types.Block {

core/state_processor.go

@@ -19,6 +19,7 @@ package core
 import (
 	"math/big"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/consensus"
 	"github.com/ethereum/go-ethereum/consensus/misc"
 	"github.com/ethereum/go-ethereum/core/state"
@@ -69,7 +70,7 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 	// Iterate over and process the individual transactions
 	for i, tx := range block.Transactions() {
 		statedb.StartRecord(tx.Hash(), block.Hash(), i)
-		receipt, _, err := ApplyTransaction(p.config, p.bc, gp, statedb, header, tx, totalUsedGas, cfg)
+		receipt, _, err := ApplyTransaction(p.config, p.bc, nil, gp, statedb, header, tx, totalUsedGas, cfg)
 		if err != nil {
 			return nil, nil, nil, err
 		}
@@ -86,13 +87,13 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 // and uses the input parameters for its environment. It returns the receipt
 // for the transaction, gas used and an error if the transaction failed,
 // indicating the block was invalid.
-func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *big.Int, cfg vm.Config) (*types.Receipt, *big.Int, error) {
+func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *big.Int, cfg vm.Config) (*types.Receipt, *big.Int, error) {
 	msg, err := tx.AsMessage(types.MakeSigner(config, header.Number))
 	if err != nil {
 		return nil, nil, err
 	}
 	// Create a new context to be used in the EVM environment
-	context := NewEVMContext(msg, header, bc)
+	context := NewEVMContext(msg, header, bc, author)
 	// Create a new environment which holds all relevant information
 	// about the transaction and calling mechanisms.
 	vmenv := vm.NewEVM(context, statedb, config, cfg)