Feat/connect wallet button

lib/soroban/soroban.ts

@@ -0,0 +1,106 @@
+import {
+	Contract,
+	TransactionBuilder,
+	Networks,
+	BASE_FEE,
+	nativeToScVal,
+	Address,
+	rpc,
+	type xdr,
+} from "@stellar/stellar-sdk";
+import {
+	allowAllModules,
+	FREIGHTER_ID,
+	StellarWalletsKit,
+	WalletNetwork,
+} from "@creit.tech/stellar-wallets-kit";
+
+const RPC_URL = "https://soroban-testnet.stellar.org";
+const CONTRACT_ADDRESS =
+	"CCCVHFXEQ5RBRRW4YX35TZ5X4D5ZZVLORIQXJB6ECI2BY5HBYBLD34PZ";
+
+const walletKit = new StellarWalletsKit({
+	network: WalletNetwork.TESTNET,
+	selectedWalletId: FREIGHTER_ID,
+	modules: allowAllModules(),
+});
+
+const TX_PARAMS = {
+	fee: BASE_FEE,
+	networkPassphrase: Networks.TESTNET,
+};
+
+/**
+ * Converts a string to an XDR symbol.
+ */
+export const stringToSymbol = (value: string) =>
+	nativeToScVal(value, { type: "symbol" });
+
+/**
+ * Converts a Stellar address to XDR format.
+ */
+export const accountToScVal = (account: string) =>
+	new Address(account).toScVal();
+
+/**
+ * Converts a number to an XDR `u64` value.
+ */
+export const numberToScVal = (value: number) =>
+	nativeToScVal(value, { type: "u64" });
+
+/**
+ * Interacts with the Soroban smart contract.
+ */
+export const contractInteraction = async (
+	functName: string,
+	values?: xdr.ScVal[],
+) => {
+	const provider = new rpc.Server(RPC_URL, { allowHttp: true });
+	const contract = new Contract(CONTRACT_ADDRESS);
+
+	// Fetch connected wallet address
+	const { address: caller } = await walletKit.getAddress();
+	if (!caller) throw new Error("No connected wallet");
+
+	const sourceAccount = await provider.getAccount(caller);
+
+	// Build transaction
+	const transaction = new TransactionBuilder(sourceAccount, TX_PARAMS)
+		.addOperation(contract.call(functName, ...(values || [])))
+		.setTimeout(120) // ⬅️ Increased timeout
+		.build();
+
+	// Prepare transaction
+	const preparedTx = await provider.prepareTransaction(transaction);
+	const preparedTxXDR = preparedTx.toXDR();
+
+	// Sign transaction using StellarWalletsKit
+	const { signedTxXdr } = await walletKit.signTransaction(preparedTxXDR, {
+		address: caller,
+		networkPassphrase: WalletNetwork.TESTNET,
+	});
+
+	const signedTx = TransactionBuilder.fromXDR(signedTxXdr, Networks.TESTNET);
+
+	try {
+		// Submit transaction
+		const sendTx = await provider.sendTransaction(signedTx);
+		if (sendTx.errorResult) throw new Error("Transaction submission failed");
+
+		// Wait for transaction confirmation
+		if (sendTx.status === "PENDING") {
+			let txResponse = await provider.getTransaction(sendTx.hash);
+			while (txResponse.status === "NOT_FOUND") {
+				await new Promise((resolve) => setTimeout(resolve, 100));
+				txResponse = await provider.getTransaction(sendTx.hash);
+			}
+
+			if (txResponse.status === "SUCCESS") {
+				return txResponse.returnValue;
+			}
+		}
+	} catch (err) {
+		console.error("Contract interaction error:", err);
+		return err;
+	}
+};