Verify write transactions in E2E tests (#22)

- Verify transaction inclusion and response code for write txs as done in cosmos-sdk E2E tests

Reviewed-on: deep-stack/laconic2d#22
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

testutil/cli/tx.go

@@ -0,0 +1,43 @@
+package cli
+
+import (
+	"fmt"
+
+	"github.com/cosmos/cosmos-sdk/client"
+	"github.com/cosmos/cosmos-sdk/client/flags"
+	clitestutil "github.com/cosmos/cosmos-sdk/testutil/cli"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	authcli "github.com/cosmos/cosmos-sdk/x/auth/client/cli"
+
+	"git.vdb.to/cerc-io/laconic2d/testutil/network"
+)
+
+// Reference: https://github.com/cosmos/cosmos-sdk/blob/v0.50.3/testutil/cli/tx.go#L15
+
+// CheckTxCode verifies that the transaction result returns a specific code
+// Takes a network, wait for two blocks and fetch the transaction from its hash
+func CheckTxCode(network *network.Network, clientCtx client.Context, txHash string, expectedCode uint32) error {
+	// wait for 2 blocks
+	for i := 0; i < 2; i++ {
+		if err := network.WaitForNextBlock(); err != nil {
+			return fmt.Errorf("failed to wait for next block: %w", err)
+		}
+	}
+
+	cmd := authcli.QueryTxCmd()
+	out, err := clitestutil.ExecTestCLICmd(clientCtx, cmd, []string{txHash, fmt.Sprintf("--%s=json", flags.FlagOutput)})
+	if err != nil {
+		return err
+	}
+
+	var response sdk.TxResponse
+	if err := clientCtx.Codec.UnmarshalJSON(out.Bytes(), &response); err != nil {
+		return err
+	}
+
+	if response.Code != expectedCode {
+		return fmt.Errorf("expected code %d, got %d", expectedCode, response.Code)
+	}
+
+	return nil
+}

testutil/network/doc.go

@@ -68,5 +68,7 @@ package network
 /*
 NOTE:
 	Copied over from https://github.com/cosmos/cosmos-sdk/tree/v0.50.3/testutil/network
-	Patch: Skipped network.LatestHeight() call at the end of New()
+	Patch:
+		- Skipped network.LatestHeight() call at the end of New()
+		- Removed block timeouts
 */