core: add test to check GetTransactionSigners interop API

pkg/core/native/native_test/ledger_test.go

@@ -1,9 +1,12 @@
 package native_test
 
 import (
+	"fmt"
 	"math/big"
+	"strings"
 	"testing"
 
+	"github.com/nspcc-dev/neo-go/pkg/compiler"
 	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
@@ -209,3 +212,92 @@ func TestLedger_GetTransactionSigners(t *testing.T) {
 		ledgerInvoker.InvokeFail(t, "expected []byte of size 32", "getTransactionSigners", []byte{1, 2, 3})
 	})
 }
+
+func TestLedger_GetTransactionSignersInteropAPI(t *testing.T) {
+	c := newLedgerClient(t)
+	e := c.Executor
+	ledgerInvoker := c.WithSigners(c.Committee)
+
+	// Firstly, add transaction with CalledByEntry rule-based signer scope to the chain.
+	tx := e.NewUnsignedTx(t, ledgerInvoker.Hash, "currentIndex")
+	tx.Signers = []transaction.Signer{{
+		Account: c.Committee.ScriptHash(),
+		Scopes:  transaction.Rules,
+		Rules: []transaction.WitnessRule{
+			{
+				Action:    transaction.WitnessAllow,
+				Condition: transaction.ConditionCalledByEntry{},
+			},
+		},
+	}}
+	neotest.AddNetworkFee(e.Chain, tx, c.Committee)
+	neotest.AddSystemFee(e.Chain, tx, -1)
+	require.NoError(t, c.Committee.SignTx(e.Chain.GetConfig().Magic, tx))
+	c.AddNewBlock(t, tx)
+	c.CheckHalt(t, tx.Hash(), stackitem.Make(e.Chain.BlockHeight()-1))
+
+	var (
+		hashStr string
+		accStr  string
+		txHash  = tx.Hash().BytesBE()
+		acc     = c.Committee.ScriptHash().BytesBE()
+	)
+	for i := 0; i < util.Uint256Size; i++ {
+		hashStr += fmt.Sprintf("%#x", txHash[i])
+		if i != util.Uint256Size-1 {
+			hashStr += ", "
+		}
+	}
+	for i := 0; i < util.Uint160Size; i++ {
+		accStr += fmt.Sprintf("%#x", acc[i])
+		if i != util.Uint160Size-1 {
+			accStr += ", "
+		}
+	}
+
+	// After that ensure interop API allows to retrieve signer with CalledByEntry rule-based scope.
+	src := `package callledger
+		import (
+			"github.com/nspcc-dev/neo-go/pkg/interop/native/ledger"
+			"github.com/nspcc-dev/neo-go/pkg/interop"
+			"github.com/nspcc-dev/neo-go/pkg/interop/util"
+		)
+		func CallLedger(accessValue bool) int {
+			signers := ledger.GetTransactionSigners(interop.Hash256{` + hashStr + `})
+			if len(signers) != 1 {
+				panic("bad length")
+			}
+			s0 := signers[0]
+			expectedAcc := interop.Hash160{` + accStr + `}
+			if !util.Equals(string(s0.Account), string(expectedAcc)) {
+				panic("bad account")
+			}
+			if s0.Scopes != ledger.Rules {
+				panic("bad signer scope")
+			}
+			if len(s0.Rules) != 1 {
+				panic("bad rules length")
+			}
+			r0 := s0.Rules[0]
+			if r0.Action != ledger.WitnessAllow {
+				panic("bad action")
+			}
+			c0 := r0.Condition
+			if c0.Type != ledger.WitnessCalledByEntry {
+				panic("bad condition type")
+			}
+			if accessValue {
+				// Panic should occur here, because there's only Type inside the CalledByEntry condition.
+				_ = c0.Value
+			}
+			return 1
+		}`
+	ctr := neotest.CompileSource(t, c.Committee.ScriptHash(), strings.NewReader(src), &compiler.Options{
+		Name: "calledger_contract",
+	})
+	e.DeployContract(t, ctr, nil)
+
+	ctrInvoker := e.NewInvoker(ctr.Hash, e.Committee)
+	ctrInvoker.Invoke(t, 1, "callLedger", false)                                                                    // Firstly, don't access CalledByEnrty Condition value => the call should be successful.
+	ctrInvoker.InvokeFail(t, `(PICKITEM): unhandled exception: "The value 1 is out of range."`, "callLedger", true) // Then, access the value to ensure it will panic.
+}

pkg/neotest/basic.go

@@ -107,8 +107,8 @@ func (e *Executor) SignTx(t testing.TB, tx *transaction.Transaction, sysFee int6
 			Scopes:  transaction.Global,
 		})
 	}
-	addNetworkFee(e.Chain, tx, signers...)
-	addSystemFee(e.Chain, tx, sysFee)
+	AddNetworkFee(e.Chain, tx, signers...)
+	AddSystemFee(e.Chain, tx, sysFee)
 
 	for _, acc := range signers {
 		require.NoError(t, acc.SignTx(e.Chain.GetConfig().Magic, tx))
@@ -276,12 +276,14 @@ func NewDeployTxBy(t testing.TB, bc blockchainer.Blockchainer, signer Signer, c
 		Account: signer.ScriptHash(),
 		Scopes:  transaction.Global,
 	}}
-	addNetworkFee(bc, tx, signer)
+	AddNetworkFee(bc, tx, signer)
 	require.NoError(t, signer.SignTx(netmode.UnitTestNet, tx))
 	return tx
 }
 
-func addSystemFee(bc blockchainer.Blockchainer, tx *transaction.Transaction, sysFee int64) {
+// AddSystemFee adds system fee to the transaction. If negative value specified,
+// then system fee is defined by test invocation.
+func AddSystemFee(bc blockchainer.Blockchainer, tx *transaction.Transaction, sysFee int64) {
 	if sysFee >= 0 {
 		tx.SystemFee = sysFee
 		return
@@ -290,7 +292,8 @@ func addSystemFee(bc blockchainer.Blockchainer, tx *transaction.Transaction, sys
 	tx.SystemFee = v.GasConsumed()
 }
 
-func addNetworkFee(bc blockchainer.Blockchainer, tx *transaction.Transaction, signers ...Signer) {
+// AddNetworkFee adds network fee to the transaction.
+func AddNetworkFee(bc blockchainer.Blockchainer, tx *transaction.Transaction, signers ...Signer) {
 	baseFee := bc.GetBaseExecFee()
 	size := io.GetVarSize(tx)
 	for _, sgr := range signers {