all: simplify_function TransitionDb (20830)

accounts/abi/bind/backends/simulated.go

@@ -478,8 +478,7 @@ func (b *SimulatedBackend) callContract(ctx context.Context, call XDPoSChain.Cal
 	vmenv := vm.NewEVM(evmContext, txContext, statedb, nil, b.config, vm.Config{NoBaseFee: true})
 	gaspool := new(core.GasPool).AddGas(math.MaxUint64)
 	owner := common.Address{}
-	res, err, _ := core.NewStateTransition(vmenv, msg, gaspool).TransitionDb(owner)
-	return res, err
+	return core.NewStateTransition(vmenv, msg, gaspool).TransitionDb(owner)
 }
 
 // SendTransaction updates the pending block to include the given transaction.

core/state_processor.go

@@ -403,7 +403,7 @@ func applyTransaction(config *params.ChainConfig, tokensFee map[common.Address]*
 	// End Bypass blacklist address
 
 	// Apply the transaction to the current state (included in the env)
-	result, err, _ := ApplyMessage(evm, msg, gp, coinbaseOwner)
+	result, err := ApplyMessage(evm, msg, gp, coinbaseOwner)
 
 	if err != nil {
 		return nil, 0, err, false

core/state_transition.go

@@ -194,7 +194,7 @@ func NewStateTransition(evm *vm.EVM, msg Message, gp *GasPool) *StateTransition
 // the gas used (which includes gas refunds) and an error if it failed. An error always
 // indicates a core error meaning that the message would always fail for that particular
 // state and would never be accepted within a block.
-func ApplyMessage(evm *vm.EVM, msg Message, gp *GasPool, owner common.Address) (*ExecutionResult, error, error) {
+func ApplyMessage(evm *vm.EVM, msg Message, gp *GasPool, owner common.Address) (*ExecutionResult, error) {
 	return NewStateTransition(evm, msg, gp).TransitionDb(owner)
 }
 
@@ -317,7 +317,7 @@ func (st *StateTransition) preCheck() error {
 //
 // However if any consensus issue encountered, return the error directly with
 // nil evm execution result.
-func (st *StateTransition) TransitionDb(owner common.Address) (*ExecutionResult, error, error) {
+func (st *StateTransition) TransitionDb(owner common.Address) (*ExecutionResult, error) {
 	// First check this message satisfies all consensus rules before
 	// applying the message. The rules include these clauses
 	//
@@ -330,7 +330,7 @@ func (st *StateTransition) TransitionDb(owner common.Address) (*ExecutionResult,
 
 	// Check clauses 1-3, buy gas if everything is correct
 	if err := st.preCheck(); err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 
 	var (
@@ -345,16 +345,16 @@ func (st *StateTransition) TransitionDb(owner common.Address) (*ExecutionResult,
 	// Check clauses 4-5, subtract intrinsic gas if everything is correct
 	gas, err := IntrinsicGas(st.data, st.msg.AccessList(), contractCreation, homestead, rules.IsEIP1559)
 	if err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 	if st.gas < gas {
-		return nil, fmt.Errorf("%w: have %d, want %d", ErrIntrinsicGas, st.gas, gas), nil
+		return nil, fmt.Errorf("%w: have %d, want %d", ErrIntrinsicGas, st.gas, gas)
 	}
 	st.gas -= gas
 
 	// Check whether the init code size has been exceeded.
 	if rules.IsEIP1559 && contractCreation && len(st.data) > params.MaxInitCodeSize {
-		return nil, fmt.Errorf("%w: code size %v limit %v", ErrMaxInitCodeSizeExceeded, len(st.data), params.MaxInitCodeSize), nil
+		return nil, fmt.Errorf("%w: code size %v limit %v", ErrMaxInitCodeSizeExceeded, len(st.data), params.MaxInitCodeSize)
 	}
 
 	// Execute the preparatory steps for state transition which includes:
@@ -365,10 +365,10 @@ func (st *StateTransition) TransitionDb(owner common.Address) (*ExecutionResult,
 	// Check clause 6
 	value, overflow := uint256.FromBig(msg.Value())
 	if overflow {
-		return nil, fmt.Errorf("%w: address %v", ErrInsufficientFundsForTransfer, msg.From().Hex()), nil
+		return nil, fmt.Errorf("%w: address %v", ErrInsufficientFundsForTransfer, msg.From().Hex())
 	}
 	if !value.IsZero() && !st.evm.Context.CanTransfer(st.state, msg.From(), value.ToBig()) {
-		return nil, fmt.Errorf("%w: address %v", ErrInsufficientFundsForTransfer, msg.From().Hex()), nil
+		return nil, fmt.Errorf("%w: address %v", ErrInsufficientFundsForTransfer, msg.From().Hex())
 	}
 
 	var (
@@ -406,7 +406,7 @@ func (st *StateTransition) TransitionDb(owner common.Address) (*ExecutionResult,
 		UsedGas:    st.gasUsed(),
 		Err:        vmerr,
 		ReturnData: ret,
-	}, nil, vmerr
+	}, nil
 }
 
 func (st *StateTransition) refundGas(refundQuotient uint64) {

core/token_validator.go

@@ -117,7 +117,7 @@ func CallContractWithState(call ethereum.CallMsg, chain consensus.ChainContext,
 	vmenv := vm.NewEVM(evmContext, txContext, statedb, nil, chain.Config(), vm.Config{})
 	gaspool := new(GasPool).AddGas(1000000)
 	owner := common.Address{}
-	result, err, _ := NewStateTransition(vmenv, msg, gaspool).TransitionDb(owner)
+	result, err := NewStateTransition(vmenv, msg, gaspool).TransitionDb(owner)
 	if err != nil {
 		return nil, err
 	}

eth/api_tracer.go

@@ -526,7 +526,7 @@ func (api *PrivateDebugAPI) traceBlock(ctx context.Context, block *types.Block,
 
 		vmenv := vm.NewEVM(blockCtx, txContext, statedb, XDCxState, api.config, vm.Config{})
 		owner := common.Address{}
-		if _, err, _ := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.Gas()), owner); err != nil {
+		if _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.Gas()), owner); err != nil {
 			failed = err
 			break
 		}
@@ -750,7 +750,7 @@ func (api *PrivateDebugAPI) traceTx(ctx context.Context, message core.Message, t
 	statedb.SetTxContext(txctx.TxHash, txctx.TxIndex)
 
 	owner := common.Address{}
-	result, err, _ := core.ApplyMessage(vmenv, message, new(core.GasPool).AddGas(message.Gas()), owner)
+	result, err := core.ApplyMessage(vmenv, message, new(core.GasPool).AddGas(message.Gas()), owner)
 	if err != nil {
 		return nil, fmt.Errorf("tracing failed: %v", err)
 	}

eth/tracers/testing/calltrace_test.go

@@ -120,7 +120,7 @@ func testCallTracer(tracerName string, dirPath string, t *testing.T) {
 				t.Fatalf("failed to prepare transaction for tracing: %v", err)
 			}
 			st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
-			if _, err, _ = st.TransitionDb(common.Address{}); err != nil {
+			if _, err = st.TransitionDb(common.Address{}); err != nil {
 				t.Fatalf("failed to execute transaction: %v", err)
 			}
 			// Retrieve the trace result and compare against the etalon
@@ -231,7 +231,7 @@ func benchTracer(tracerName string, test *callTracerTest, b *testing.B) {
 		evm := vm.NewEVM(context, txContext, statedb, nil, test.Genesis.Config, vm.Config{Debug: true, Tracer: tracer})
 		snap := statedb.Snapshot()
 		st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
-		if _, err, _ = st.TransitionDb(common.Address{}); err != nil {
+		if _, err = st.TransitionDb(common.Address{}); err != nil {
 			b.Fatalf("failed to execute transaction: %v", err)
 		}
 		if _, err = tracer.GetResult(); err != nil {

eth/tracers/tracers_test.go

@@ -158,7 +158,7 @@ func TestZeroValueToNotExitCall(t *testing.T) {
 		t.Fatalf("failed to prepare transaction for tracing: %v", err)
 	}
 	st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
-	if _, err, _ = st.TransitionDb(common.Address{}); err != nil {
+	if _, err = st.TransitionDb(common.Address{}); err != nil {
 		t.Fatalf("failed to execute transaction: %v", err)
 	}
 	// Retrieve the trace result and compare against the etalon
@@ -244,7 +244,7 @@ func TestPrestateTracerCreate2(t *testing.T) {
 		t.Fatalf("failed to prepare transaction for tracing: %v", err)
 	}
 	st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
-	if _, err, _ = st.TransitionDb(common.Address{}); err != nil {
+	if _, err = st.TransitionDb(common.Address{}); err != nil {
 		t.Fatalf("failed to execute transaction: %v", err)
 	}
 	// Retrieve the trace result and compare against the etalon
@@ -346,7 +346,7 @@ func BenchmarkTransactionTrace(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		snap := statedb.Snapshot()
 		st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
-		_, err, _ = st.TransitionDb(common.Address{})
+		_, err = st.TransitionDb(common.Address{})
 		if err != nil {
 			b.Fatal(err)
 		}

internal/ethapi/api.go

@@ -1322,18 +1322,18 @@ func (s *PublicBlockChainAPI) getCandidatesFromSmartContract() ([]utils.Masterno
 	return candidatesWithStakeInfo, nil
 }
 
-func DoCall(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride, timeout time.Duration, globalGasCap uint64) (*core.ExecutionResult, error, error) {
+func DoCall(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride, timeout time.Duration, globalGasCap uint64) (*core.ExecutionResult, error) {
 	defer func(start time.Time) { log.Debug("Executing EVM call finished", "runtime", time.Since(start)) }(time.Now())
 
 	statedb, header, err := b.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash)
 	if statedb == nil || err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 	if header == nil {
-		return nil, errors.New("nil header in DoCall"), nil
+		return nil, errors.New("nil header in DoCall")
 	}
 	if err := overrides.Apply(statedb); err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 
 	// Setup context so it may be cancelled the call has completed
@@ -1350,32 +1350,32 @@ func DoCall(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash
 
 	block, err := b.BlockByNumberOrHash(ctx, blockNrOrHash)
 	if err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 	if block == nil {
-		return nil, fmt.Errorf("nil block in DoCall: number=%d, hash=%s", header.Number.Uint64(), header.Hash().Hex()), nil
+		return nil, fmt.Errorf("nil block in DoCall: number=%d, hash=%s", header.Number.Uint64(), header.Hash().Hex())
 	}
 	author, err := b.GetEngine().Author(block.Header())
 	if err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 	XDCxState, err := b.XDCxService().GetTradingState(block, author)
 	if err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 
 	// TODO: replace header.BaseFee with blockCtx.BaseFee
 	// reference: https://github.com/ethereum/go-ethereum/pull/29051
 	msg, err := args.ToMessage(b, header.Number, globalGasCap, header.BaseFee)
 	if err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 	msg.SetBalanceTokenFeeForCall()
 
 	// Get a new instance of the EVM.
 	evm, vmError, err := b.GetEVM(ctx, msg, statedb, XDCxState, header, &vm.Config{NoBaseFee: true})
 	if err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 	// Wait for the context to be done and cancel the evm. Even if the
 	// EVM has finished, cancelling may be done (repeatedly)
@@ -1387,19 +1387,19 @@ func DoCall(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash
 	// Execute the message.
 	gp := new(core.GasPool).AddGas(math.MaxUint64)
 	owner := common.Address{}
-	result, err, vmErr := core.ApplyMessage(evm, msg, gp, owner)
+	result, err := core.ApplyMessage(evm, msg, gp, owner)
 	if err := vmError(); err != nil {
-		return nil, err, nil
+		return nil, err
 	}
 
 	// If the timer caused an abort, return an appropriate error message
 	if evm.Cancelled() {
-		return nil, fmt.Errorf("execution aborted (timeout = %v)", timeout), nil
+		return nil, fmt.Errorf("execution aborted (timeout = %v)", timeout)
 	}
 	if err != nil {
-		return result, fmt.Errorf("err: %w (supplied gas %d)", err, msg.Gas()), nil
+		return result, fmt.Errorf("err: %w (supplied gas %d)", err, msg.Gas())
 	}
-	return result, err, vmErr
+	return result, err
 }
 
 func newRevertError(res []byte) *revertError {
@@ -1443,15 +1443,15 @@ func (s *PublicBlockChainAPI) Call(ctx context.Context, args TransactionArgs, bl
 	if args.To != nil && *args.To == common.MasternodeVotingSMCBinary {
 		timeout = 0
 	}
-	result, err, vmErr := DoCall(ctx, s.b, args, *blockNrOrHash, overrides, timeout, s.b.RPCGasCap())
+	result, err := DoCall(ctx, s.b, args, *blockNrOrHash, overrides, timeout, s.b.RPCGasCap())
 	if err != nil {
 		return nil, err
 	}
 	// If the result contains a revert reason, try to unpack and return it.
-	if result.Failed() && len(result.Return()) > 0 {
+	if result.Failed() {
 		return nil, newRevertError(result.Return())
 	}
-	return result.Return(), vmErr
+	return result.Return(), nil
 }
 
 type estimateGasError struct {
@@ -1515,7 +1515,7 @@ func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNr
 	executable := func(gas uint64) (bool, *core.ExecutionResult, error) {
 		args.Gas = (*hexutil.Uint64)(&gas)
 
-		result, err, _ := DoCall(ctx, b, args, blockNrOrHash, nil, 0, gasCap)
+		result, err := DoCall(ctx, b, args, blockNrOrHash, nil, 0, gasCap)
 		if err != nil {
 			if errors.Is(err, vm.ErrOutOfGas) || errors.Is(err, core.ErrIntrinsicGas) {
 				return true, nil, nil // Special case, raise gas limit
@@ -2096,7 +2096,7 @@ func AccessList(ctx context.Context, b Backend, blockNrOrHash rpc.BlockNumberOrH
 			return nil, 0, nil, err
 		}
 		// TODO: determine the value of owner
-		res, err, _ := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.Gas()), owner)
+		res, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.Gas()), owner)
 		if err != nil {
 			return nil, 0, nil, fmt.Errorf("failed to apply transaction: %v err: %v", args.toTransaction().Hash(), err)
 		}

les/odr_test.go

@@ -142,7 +142,7 @@ func odrContractCall(ctx context.Context, db ethdb.Database, config *params.Chai
 				//vmenv := core.NewEnv(statedb, config, bc, msg, header, vm.Config{})
 				gp := new(core.GasPool).AddGas(math.MaxUint64)
 				owner := common.Address{}
-				result, _, _ := core.ApplyMessage(vmenv, msg, gp, owner)
+				result, _ := core.ApplyMessage(vmenv, msg, gp, owner)
 				res = append(res, result.Return()...)
 			}
 		} else {
@@ -160,7 +160,7 @@ func odrContractCall(ctx context.Context, db ethdb.Database, config *params.Chai
 			vmenv := vm.NewEVM(context, txContext, statedb, nil, config, vm.Config{NoBaseFee: true})
 			gp := new(core.GasPool).AddGas(math.MaxUint64)
 			owner := common.Address{}
-			result, _, _ := core.ApplyMessage(vmenv, msg, gp, owner)
+			result, _ := core.ApplyMessage(vmenv, msg, gp, owner)
 			if statedb.Error() == nil {
 				res = append(res, result.Return()...)
 			}

light/odr_test.go

@@ -191,7 +191,7 @@ func odrContractCall(ctx context.Context, db ethdb.Database, bc *core.BlockChain
 		vmenv := vm.NewEVM(context, txContext, st, nil, config, vm.Config{NoBaseFee: true})
 		gp := new(core.GasPool).AddGas(math.MaxUint64)
 		owner := common.Address{}
-		result, _, _ := core.ApplyMessage(vmenv, msg, gp, owner)
+		result, _ := core.ApplyMessage(vmenv, msg, gp, owner)
 		res = append(res, result.Return()...)
 		if st.Error() != nil {
 			return res, st.Error()

tests/state_test_util.go

@@ -166,7 +166,7 @@ func (t *StateTest) Run(subtest StateSubtest, vmconfig vm.Config) (*state.StateD
 	gaspool.AddGas(block.GasLimit())
 
 	coinbase := &t.json.Env.Coinbase
-	if _, err, _ := core.ApplyMessage(evm, msg, gaspool, *coinbase); err != nil {
+	if _, err := core.ApplyMessage(evm, msg, gaspool, *coinbase); err != nil {
 		statedb.RevertToSnapshot(snapshot)
 	}
 	if logs := rlpHash(statedb.Logs()); logs != common.Hash(post.Logs) {