Please connect your wallet and try again.
'); + return; + } + + updateRegistrationStatus('processing', 'FETCHING TRANSACTION FROM SNS...'); + + try { + // 1. Fetch serialised transaction from SDK proxy + const params = new URLSearchParams({ + buyer: walletAddress, + domain: domain, + space: '0', + serialize: 'true', + refKey: REFERRAL_WALLET, + mint: USDC_MINT + }); + + const apiUrl = `${SNS_REGISTER_API}/register?${params.toString()}`; + const res = await fetch(apiUrl); + + if (!res.ok) { + throw new Error(`SNS API returned HTTP ${res.status}`); + } + + const data = await res.json(); + + if (data.s !== 'ok' || !data.result) { + const errMsg = typeof data.result === 'string' ? data.result : (data.error || 'Unknown error from SNS API'); + throw new Error(errMsg); + } + + updateRegistrationStatus('processing', 'PREPARING TRANSACTION...'); + + // 2. Decode base64 transaction + const txBytes = base64ToUint8Array(data.result); + + // 3. Deserialise — try VersionedTransaction first, fallback to legacy + let transaction; + let isVersioned = false; + + try { + transaction = solanaWeb3.VersionedTransaction.deserialize(txBytes); + isVersioned = true; + } catch (e) { + try { + transaction = solanaWeb3.Transaction.from(txBytes); + isVersioned = false; + } catch (e2) { + throw new Error('Failed to deserialise transaction from SNS API'); + } + } + + // 4. Get fresh blockhash from Solana RPC + const connection = new solanaWeb3.Connection(SOLANA_RPC, 'confirmed'); + const { blockhash, lastValidBlockHeight } = await connection.getLatestBlockhash('confirmed'); + + // 5. Set fresh blockhash on transaction + if (isVersioned) { + transaction.message.recentBlockhash = blockhash; + } else { + transaction.recentBlockhash = blockhash; + } + + updateRegistrationStatus('processing', 'AWAITING WALLET SIGNATURE...'); + + // 6. Sign and send via connected wallet + let signature; + + if (connectedProvider.isWalletStandard) { + signature = await signAndSendWalletStandard(transaction, isVersioned, connection); + } else { + signature = await signAndSendLegacy(transaction, isVersioned, connection); + } + + updateRegistrationStatus('pending', 'TRANSACTION SUBMITTED — CONFIRMING...', + `${esc(userMessage)}
+