accounts/abi/bind, ethclient/simulated: check SendTransaction error in tests (#30349)

In few tests the returned error from `SendTransaction` is not being
checked. This PR checks the returned err in tests.

Returning errors also revealed tx in `TestCommitReturnValue` is not
actually being sent, and returns err ` only replay-protected (EIP-155)
transactions allowed over RPC`. Fixed the transaction by using the
`testTx` function.

accounts/abi/bind/util_test.go

@@ -82,7 +82,9 @@ func TestWaitDeployed(t *testing.T) {
 		}()
 
 		// Send and mine the transaction.
-		backend.Client().SendTransaction(ctx, tx)
+		if err := backend.Client().SendTransaction(ctx, tx); err != nil {
+			t.Errorf("test %q: failed to send transaction: %v", name, err)
+		}
 		backend.Commit()
 
 		select {
@@ -116,7 +118,9 @@ func TestWaitDeployedCornerCases(t *testing.T) {
 	tx, _ = types.SignTx(tx, types.LatestSigner(params.AllDevChainProtocolChanges), testKey)
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	backend.Client().SendTransaction(ctx, tx)
+	if err := backend.Client().SendTransaction(ctx, tx); err != nil {
+		t.Errorf("failed to send transaction: %q", err)
+	}
 	backend.Commit()
 	notContractCreation := errors.New("tx is not contract creation")
 	if _, err := bind.WaitDeployed(ctx, backend.Client(), tx); err.Error() != notContractCreation.Error() {
@@ -134,6 +138,8 @@ func TestWaitDeployedCornerCases(t *testing.T) {
 		}
 	}()
 
-	backend.Client().SendTransaction(ctx, tx)
+	if err := backend.Client().SendTransaction(ctx, tx); err != nil {
+		t.Errorf("failed to send transaction: %q", err)
+	}
 	cancel()
 }

ethclient/simulated/backend_test.go

@@ -213,7 +213,9 @@ func TestForkResendTx(t *testing.T) {
 	if err != nil {
 		t.Fatalf("could not create transaction: %v", err)
 	}
-	client.SendTransaction(ctx, tx)
+	if err := client.SendTransaction(ctx, tx); err != nil {
+		t.Fatalf("sending transaction: %v", err)
+	}
 	sim.Commit()
 
 	// 3.
@@ -256,11 +258,10 @@ func TestCommitReturnValue(t *testing.T) {
 	}
 
 	// Create a block in the original chain (containing a transaction to force different block hashes)
-	head, _ := client.HeaderByNumber(ctx, nil) // Should be child's, good enough
-	gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
-	_tx := types.NewTransaction(0, testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
-	tx, _ := types.SignTx(_tx, types.HomesteadSigner{}, testKey)
-	client.SendTransaction(ctx, tx)
+	tx, _ := newTx(sim, testKey)
+	if err := client.SendTransaction(ctx, tx); err != nil {
+		t.Errorf("sending transaction: %v", err)
+	}
 
 	h2 := sim.Commit()