core: use proper DAO to get ExecFeeFactor

The usage of the Blockchain's one leads to the same ExecFeeFactor within
a single block. What we need is to update ExecFeeFactor after each
transaction invocation, thus, cached DAO should be used as it contains
all relevant changes.

pkg/compiler/interop_test.go

@@ -200,7 +200,7 @@ func TestAppCall(t *testing.T) {
 	}
 
 	fc := fakechain.NewFakeChain()
-	ic := interop.NewContext(trigger.Application, fc, dao.NewSimple(storage.NewMemoryStore(), false, false), contractGetter, nil, nil, nil, zaptest.NewLogger(t))
+	ic := interop.NewContext(trigger.Application, fc, dao.NewSimple(storage.NewMemoryStore(), false, false), interop.DefaultBaseExecFee, contractGetter, nil, nil, nil, zaptest.NewLogger(t))
 
 	t.Run("valid script", func(t *testing.T) {
 		src := getAppCallScript(fmt.Sprintf("%#v", ih.BytesBE()))

pkg/core/blockchain.go

@@ -2304,7 +2304,14 @@ func (bc *Blockchain) ManagementContractHash() util.Uint160 {
 }
 
 func (bc *Blockchain) newInteropContext(trigger trigger.Type, d *dao.Simple, block *block.Block, tx *transaction.Transaction) *interop.Context {
-	ic := interop.NewContext(trigger, bc, d, bc.contracts.Management.GetContract, bc.contracts.Contracts, block, tx, bc.log)
+	baseExecFee := int64(interop.DefaultBaseExecFee)
+
+	if block == nil || block.Index != 0 {
+		// Use provided dao instead of Blockchain's one to fetch possible ExecFeeFactor
+		// changes that were not yet persisted to Blockchain's dao.
+		baseExecFee = bc.contracts.Policy.GetExecFeeFactorInternal(d)
+	}
+	ic := interop.NewContext(trigger, bc, d, baseExecFee, bc.contracts.Management.GetContract, bc.contracts.Contracts, block, tx, bc.log)
 	ic.Functions = systemInterops
 	switch {
 	case tx != nil:

pkg/core/interop/context.go

@@ -67,15 +67,10 @@ type Context struct {
 }
 
 // NewContext returns new interop context.
-func NewContext(trigger trigger.Type, bc Ledger, d *dao.Simple,
+func NewContext(trigger trigger.Type, bc Ledger, d *dao.Simple, baseExecFee int64,
 	getContract func(*dao.Simple, util.Uint160) (*state.Contract, error), natives []Contract,
 	block *block.Block, tx *transaction.Transaction, log *zap.Logger) *Context {
-	baseExecFee := int64(DefaultBaseExecFee)
 	dao := d.GetPrivate()
-
-	if bc != nil && (block == nil || block.Index != 0) {
-		baseExecFee = bc.GetBaseExecFee()
-	}
 	return &Context{
 		Chain:       bc,
 		Network:     uint32(bc.GetConfig().Magic),

pkg/core/interop/crypto/ecdsa_test.go

@@ -72,7 +72,7 @@ func initCheckMultisigVMNoArgs(container *transaction.Transaction) *vm.VM {
 		trigger.Verification,
 		fakechain.NewFakeChain(),
 		dao.NewSimple(storage.NewMemoryStore(), false, false),
-		nil, nil, nil,
+		interop.DefaultBaseExecFee, nil, nil, nil,
 		container,
 		nil)
 	ic.Container = container

pkg/core/native/native_test/common_test.go

@@ -55,16 +55,25 @@ func testGetSet(t *testing.T, c *neotest.ContractInvoker, name string, defaultVa
 		c.AddNewBlock(t, txSet, txGet)
 		c.CheckHalt(t, txSet.Hash(), stackitem.Null{})
 
-		if name != "GasPerBlock" { // GasPerBlock is set on the next block
+		switch name {
-			c.CheckHalt(t, txGet.Hash(), stackitem.Make(defaultValue+1))
+		case "GasPerBlock":
-		} else {
+			// GasPerBlock is set on the next block
 			c.CheckHalt(t, txGet.Hash(), stackitem.Make(defaultValue))
 			c.AddNewBlock(t)
 			randomInvoker.Invoke(t, defaultValue+1, getName)
-		}
+		case "ExecFeeFactor":
-
+			// ExecFeeFactor was risen, so the second transaction will fail because
+			// of gas limit exceeding (its fees are out-of-date).
+			c.CheckFault(t, txGet.Hash(), "gas limit exceeded")
+			// Set in a separate block.
+			committeeInvoker.Invoke(t, stackitem.Null{}, setName, defaultValue+1)
 			// Get in the next block.
 			randomInvoker.Invoke(t, defaultValue+1, getName)
+		default:
+			c.CheckHalt(t, txGet.Hash(), stackitem.Make(defaultValue+1))
+			// Get in the next block.
+			randomInvoker.Invoke(t, defaultValue+1, getName)
+		}
 	})
 }