core: implement EIP-3651, warm coinbase (ethereum#25819)

Implements EIP-3651, "Warm Coinbase", for Shanghai hardfork. Specification: https://eips.ethereum.org/EIPS/eip-3651.

Author: MariusVanDerWijden

core/blockchain_test.go

@@ -4187,3 +4187,111 @@ func TestTransientStorageReset(t *testing.T) {
 		t.Fatalf("Unexpected dirty storage slot")
 	}
 }
+
+func TestEIP3651(t *testing.T) {
+	var (
+		aa     = common.HexToAddress("0x000000000000000000000000000000000000aaaa")
+		bb     = common.HexToAddress("0x000000000000000000000000000000000000bbbb")
+		engine = ethash.NewFaker()
+
+		// A sender who makes transactions, has some funds
+		key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
+		key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
+		addr1   = crypto.PubkeyToAddress(key1.PublicKey)
+		addr2   = crypto.PubkeyToAddress(key2.PublicKey)
+		funds   = new(big.Int).Mul(common.Big1, big.NewInt(params.Ether))
+		gspec   = &Genesis{
+			Config: params.AllEthashProtocolChanges,
+			Alloc: GenesisAlloc{
+				addr1: {Balance: funds},
+				addr2: {Balance: funds},
+				// The address 0xAAAA sloads 0x00 and 0x01
+				aa: {
+					Code: []byte{
+						byte(vm.PC),
+						byte(vm.PC),
+						byte(vm.SLOAD),
+						byte(vm.SLOAD),
+					},
+					Nonce:   0,
+					Balance: big.NewInt(0),
+				},
+				// The address 0xBBBB calls 0xAAAA
+				bb: {
+					Code: []byte{
+						byte(vm.PUSH1), 0, // out size
+						byte(vm.DUP1),  // out offset
+						byte(vm.DUP1),  // out insize
+						byte(vm.DUP1),  // in offset
+						byte(vm.PUSH2), // address
+						byte(0xaa),
+						byte(0xaa),
+						byte(vm.GAS), // gas
+						byte(vm.DELEGATECALL),
+					},
+					Nonce:   0,
+					Balance: big.NewInt(0),
+				},
+			},
+		}
+	)
+
+	gspec.Config.BerlinBlock = common.Big0
+	gspec.Config.LondonBlock = common.Big0
+	gspec.Config.ShanghaiBlock = common.Big0
+	signer := types.LatestSigner(gspec.Config)
+
+	_, blocks, _ := GenerateChainWithGenesis(gspec, engine, 1, func(i int, b *BlockGen) {
+		b.SetCoinbase(aa)
+		// One transaction to Coinbase
+		txdata := &types.DynamicFeeTx{
+			ChainID:    gspec.Config.ChainID,
+			Nonce:      0,
+			To:         &bb,
+			Gas:        500000,
+			GasFeeCap:  newGwei(5),
+			GasTipCap:  big.NewInt(2),
+			AccessList: nil,
+			Data:       []byte{},
+		}
+		tx := types.NewTx(txdata)
+		tx, _ = types.SignTx(tx, signer, key1)
+
+		b.AddTx(tx)
+	})
+	chain, err := NewBlockChain(rawdb.NewMemoryDatabase(), nil, gspec, nil, engine, vm.Config{Tracer: logger.NewMarkdownLogger(&logger.Config{}, os.Stderr)}, nil, nil)
+	if err != nil {
+		t.Fatalf("failed to create tester chain: %v", err)
+	}
+	if n, err := chain.InsertChain(blocks); err != nil {
+		t.Fatalf("block %d: failed to insert into chain: %v", n, err)
+	}
+
+	block := chain.GetBlockByNumber(1)
+
+	// 1+2: Ensure EIP-1559 access lists are accounted for via gas usage.
+	innerGas := vm.GasQuickStep*2 + params.ColdSloadCostEIP2929*2
+	expectedGas := params.TxGas + 5*vm.GasFastestStep + vm.GasQuickStep + 100 + innerGas // 100 because 0xaaaa is in access list
+	if block.GasUsed() != expectedGas {
+		t.Fatalf("incorrect amount of gas spent: expected %d, got %d", expectedGas, block.GasUsed())
+	}
+
+	state, _ := chain.State()
+
+	// 3: Ensure that miner received only the tx's tip.
+	actual := state.GetBalance(block.Coinbase())
+	expected := new(big.Int).Add(
+		new(big.Int).SetUint64(block.GasUsed()*block.Transactions()[0].GasTipCap().Uint64()),
+		ethash.ConstantinopleBlockReward,
+	)
+	if actual.Cmp(expected) != 0 {
+		t.Fatalf("miner balance incorrect: expected %d, got %d", expected, actual)
+	}
+
+	// 4: Ensure the tx sender paid for the gasUsed * (tip + block baseFee).
+	actual = new(big.Int).Sub(funds, state.GetBalance(addr1))
+	expected = new(big.Int).SetUint64(block.GasUsed() * (block.Transactions()[0].GasTipCap().Uint64() + block.BaseFee().Uint64()))
+	if actual.Cmp(expected) != 0 {
+		t.Fatalf("sender balance incorrect: expected %d, got %d", expected, actual)
+	}
+}

core/state/statedb.go

@@ -1067,26 +1067,32 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
 // - Add the contents of the optional tx access list (2930)
 //
 // Potential EIPs:
-// - Reset transient storage(1153)
-func (s *StateDB) Prepare(rules params.Rules, sender common.Address, dst *common.Address, precompiles []common.Address, list types.AccessList) {
+// - Reset access list (Berlin)
+// - Add coinbase to access list (EIP-3651)
+// - Reset transient storage (EIP-1153)
+func (s *StateDB) Prepare(rules params.Rules, sender, coinbase common.Address, dst *common.Address, precompiles []common.Address, list types.AccessList) {
 	if rules.IsBerlin {
 		// Clear out any leftover from previous executions
-		s.accessList = newAccessList()
+		al := newAccessList()
+		s.accessList = al
 
-		s.AddAddressToAccessList(sender)
+		al.AddAddress(sender)
 		if dst != nil {
-			s.AddAddressToAccessList(*dst)
+			al.AddAddress(*dst)
 			// If it's a create-tx, the destination will be added inside evm.create
 		}
 		for _, addr := range precompiles {
-			s.AddAddressToAccessList(addr)
+			al.AddAddress(addr)
 		}
 		for _, el := range list {
-			s.AddAddressToAccessList(el.Address)
+			al.AddAddress(el.Address)
 			for _, key := range el.StorageKeys {
-				s.AddSlotToAccessList(el.Address, key)
+				al.AddSlot(el.Address, key)
 			}
 		}
+		if rules.IsShanghai { // EIP-3651: warm coinbase
+			al.AddAddress(coinbase)
+		}
 	}
 	// Reset transient storage at the beginning of transaction execution
 	s.transientStorage = newTransientStorage()

core/state_transition.go

@@ -322,7 +322,7 @@ func (st *StateTransition) TransitionDb() (*ExecutionResult, error) {
 	// Execute the preparatory steps for state transition which includes:
 	// - prepare accessList(post-berlin)
 	// - reset transient storage(eip 1153)
-	st.state.Prepare(rules, msg.From(), msg.To(), vm.ActivePrecompiles(rules), msg.AccessList())
+	st.state.Prepare(rules, msg.From(), st.evm.Context.Coinbase, msg.To(), vm.ActivePrecompiles(rules), msg.AccessList())
 
 	var (
 		ret   []byte

core/vm/interface.go

@@ -69,7 +69,7 @@ type StateDB interface {
 	// AddSlotToAccessList adds the given (address,slot) to the access list. This operation is safe to perform
 	// even if the feature/fork is not active yet
 	AddSlotToAccessList(addr common.Address, slot common.Hash)
-	Prepare(rules params.Rules, sender common.Address, dest *common.Address, precompiles []common.Address, txAccesses types.AccessList)
+	Prepare(rules params.Rules, sender, coinbase common.Address, dest *common.Address, precompiles []common.Address, txAccesses types.AccessList)
 
 	RevertToSnapshot(int)
 	Snapshot() int

core/vm/runtime/runtime.go

@@ -122,7 +122,7 @@ func Execute(code, input []byte, cfg *Config) ([]byte, *state.StateDB, error) {
 	// Execute the preparatory steps for state transition which includes:
 	// - prepare accessList(post-berlin)
 	// - reset transient storage(eip 1153)
-	cfg.State.Prepare(rules, cfg.Origin, &address, vm.ActivePrecompiles(rules), nil)
+	cfg.State.Prepare(rules, cfg.Origin, cfg.Coinbase, &address, vm.ActivePrecompiles(rules), nil)
 
 	cfg.State.CreateAccount(address)
 	// set the receiver's (the executing contract) code for execution.
@@ -156,7 +156,7 @@ func Create(input []byte, cfg *Config) ([]byte, common.Address, uint64, error) {
 	// Execute the preparatory steps for state transition which includes:
 	// - prepare accessList(post-berlin)
 	// - reset transient storage(eip 1153)
-	cfg.State.Prepare(rules, cfg.Origin, nil, vm.ActivePrecompiles(rules), nil)
+	cfg.State.Prepare(rules, cfg.Origin, cfg.Coinbase, nil, vm.ActivePrecompiles(rules), nil)
 
 	// Call the code with the given configuration.
 	code, address, leftOverGas, err := vmenv.Create(
@@ -185,7 +185,7 @@ func Call(address common.Address, input []byte, cfg *Config) ([]byte, uint64, er
 	// Execute the preparatory steps for state transition which includes:
 	// - prepare accessList(post-berlin)
 	// - reset transient storage(eip 1153)
-	statedb.Prepare(rules, cfg.Origin, &address, vm.ActivePrecompiles(rules), nil)
+	statedb.Prepare(rules, cfg.Origin, cfg.Coinbase, &address, vm.ActivePrecompiles(rules), nil)
 
 	// Call the code with the given configuration.
 	ret, leftOverGas, err := vmenv.Call(

tests/state_test.go

@@ -241,7 +241,7 @@ func runBenchmark(b *testing.B, t *StateTest) {
 			b.ResetTimer()
 			for n := 0; n < b.N; n++ {
 				snapshot := statedb.Snapshot()
-				statedb.Prepare(rules, msg.From(), msg.To(), vm.ActivePrecompiles(rules), msg.AccessList())
+				statedb.Prepare(rules, msg.From(), context.Coinbase, msg.To(), vm.ActivePrecompiles(rules), msg.AccessList())
 				b.StartTimer()
 				start := time.Now()