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Covers both the React wallet-adapter approach (sendTransaction) and the vanilla browser approach (signAndSendTransaction wallet-standard feature).",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},"metamask","MetaMask","https:\u002F\u002Fpexgzepcugksgbtrxkhf.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Forg-logos\u002Fmetamask.png",[12,16,19],{"name":13,"slug":14,"type":15},"Web3","web3","tag",{"name":17,"slug":18,"type":15},"Payments","payments",{"name":20,"slug":21,"type":15},"Solana","solana",2,"https:\u002F\u002Fgithub.com\u002FMetaMask\u002Fmetamask-connect-cursor-plugin","2026-07-13T06:12:03.942378",null,[],{"repoUrl":23,"stars":22,"forks":22,"topics":28,"description":29},[],"Cursor plugin for building dApps with the MetaMask Connect SDK — skills, rules, and agents for EVM, Solana, and multichain integrations","https:\u002F\u002Fgithub.com\u002FMetaMask\u002Fmetamask-connect-cursor-plugin\u002Ftree\u002FHEAD\u002Fskills\u002Fsend-solana-transaction","---\nname: send-solana-transaction\ndescription: Build and send a Solana transaction using MetaMask Connect. Covers both the React wallet-adapter approach (sendTransaction) and the vanilla browser approach (signAndSendTransaction wallet-standard feature).\n---\n# Send Solana Transaction with MetaMask\n\n## When to use\n\nUse this skill when:\n- Sending SOL or interacting with Solana programs via MetaMask Connect\n- Building a `Transaction` with `@solana\u002Fweb3.js` and submitting it through the wallet\n- Using `sendTransaction` from `useWallet` in a React app\n- Using the `solana:signAndSendTransaction` wallet-standard feature in a vanilla browser app\n\n## Workflow\n\n### Step 1: Build the transaction\n\nUse `@solana\u002Fweb3.js` to construct the transaction. Every transaction needs a recent blockhash and a fee payer.\n\n```typescript\nimport {\n Connection,\n Transaction,\n SystemProgram,\n PublicKey,\n LAMPORTS_PER_SOL,\n} from '@solana\u002Fweb3.js';\n\nconst connection = new Connection('https:\u002F\u002Fapi.mainnet-beta.solana.com');\nconst { blockhash } = await connection.getLatestBlockhash();\n\nconst senderPubkey = new PublicKey('SENDER_PUBLIC_KEY');\nconst recipientPubkey = new PublicKey('RECIPIENT_PUBLIC_KEY');\n\nconst transaction = new Transaction().add(\n SystemProgram.transfer({\n fromPubkey: senderPubkey,\n toPubkey: recipientPubkey,\n lamports: 0.001 * LAMPORTS_PER_SOL,\n }),\n);\ntransaction.recentBlockhash = blockhash;\ntransaction.feePayer = senderPubkey;\n```\n\n### Step 2a: Send with React wallet-adapter (useWallet)\n\n**Prerequisites:** `createSolanaClient` has been awaited before rendering, `WalletProvider` is configured with `wallets={[]}`, and the user is connected. See the `setup-solana-react-app` skill.\n\n```tsx\nimport { useWallet, useConnection } from '@solana\u002Fwallet-adapter-react';\nimport {\n Transaction,\n SystemProgram,\n PublicKey,\n LAMPORTS_PER_SOL,\n} from '@solana\u002Fweb3.js';\n\nfunction SendTransactionButton() {\n const { publicKey, sendTransaction, connected } = useWallet();\n const { connection } = useConnection();\n\n const handleSend = async () => {\n if (!publicKey || !sendTransaction) return;\n\n try {\n const { blockhash } = await connection.getLatestBlockhash();\n\n const transaction = new Transaction().add(\n SystemProgram.transfer({\n fromPubkey: publicKey,\n toPubkey: new PublicKey('RECIPIENT_PUBLIC_KEY'),\n lamports: 0.001 * LAMPORTS_PER_SOL,\n }),\n );\n transaction.recentBlockhash = blockhash;\n transaction.feePayer = publicKey;\n\n const signature = await sendTransaction(transaction, connection);\n console.log('Transaction submitted:', signature);\n\n const confirmation = await connection.confirmTransaction(signature, 'confirmed');\n console.log('Transaction confirmed:', confirmation);\n } catch (err: any) {\n if (err.code === 4001) {\n console.log('User rejected the transaction');\n return;\n }\n console.error('Transaction failed:', err);\n }\n };\n\n return (\n \u003Cbutton onClick={handleSend} disabled={!connected || !publicKey}>\n Send 0.001 SOL\n \u003C\u002Fbutton>\n );\n}\n```\n\n### Step 2b: Send with vanilla browser (wallet-standard feature)\n\n**Prerequisites:** `createSolanaClient` has been called and the wallet is connected via `standard:connect`. See the `setup-solana-browser-app` skill.\n\n```typescript\nimport { createSolanaClient } from '@metamask\u002Fconnect-solana';\nimport {\n Connection,\n Transaction,\n SystemProgram,\n PublicKey,\n LAMPORTS_PER_SOL,\n} from '@solana\u002Fweb3.js';\n\nconst solanaClient = await createSolanaClient({\n dapp: { name: 'My DApp', url: window.location.href },\n});\n\nconst wallet = solanaClient.getWallet();\n\n\u002F\u002F Connect first\nconst connectFeature = wallet.features['standard:connect'];\nconst { accounts } = await connectFeature.connect();\nconst account = accounts[0];\nconst senderPubkey = new PublicKey(account.address);\n\n\u002F\u002F Build the transaction\nconst connection = new Connection('https:\u002F\u002Fapi.mainnet-beta.solana.com');\nconst { blockhash } = await connection.getLatestBlockhash();\n\nconst transaction = new Transaction().add(\n SystemProgram.transfer({\n fromPubkey: senderPubkey,\n toPubkey: new PublicKey('RECIPIENT_PUBLIC_KEY'),\n lamports: 0.001 * LAMPORTS_PER_SOL,\n }),\n);\ntransaction.recentBlockhash = blockhash;\ntransaction.feePayer = senderPubkey;\n\n\u002F\u002F Serialize and send\nconst serializedTransaction = transaction.serialize({\n requireAllSignatures: false,\n});\n\nconst signAndSendFeature = wallet.features['solana:signAndSendTransaction'];\n\n\u002F\u002F The `chain` field accepts the wallet-standard short forms ('solana:mainnet',\n\u002F\u002F 'solana:devnet', 'solana:testnet') or the full genesis-hash CAIP-2 scope\n\u002F\u002F (e.g. 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp'). It is optional and\n\u002F\u002F defaults to mainnet. Bare 'mainnet' (without the 'solana:' prefix) is\n\u002F\u002F INVALID here and throws 'Unsupported chainId' — the SolanaNetwork short\n\u002F\u002F names apply only to createSolanaClient's api.supportedNetworks keys.\n\n\u002F\u002F Requires `npm install bs58` and `import bs58 from 'bs58'` at the top of the file\ntry {\n const [{ signature }] = await signAndSendFeature.signAndSendTransaction({\n account,\n transaction: serializedTransaction,\n chain: 'solana:mainnet', \u002F\u002F wallet-standard short form; full genesis-hash CAIP-2 IDs also accepted\n });\n\n \u002F\u002F signature is a Uint8Array — encode with bs58 ('base58' is NOT a Buffer encoding)\n const signatureBase58 = bs58.encode(signature);\n console.log('Transaction submitted:', signatureBase58);\n\n \u002F\u002F confirmTransaction expects the base58 signature string\n const confirmation = await connection.confirmTransaction(signatureBase58, 'confirmed');\n console.log('Transaction confirmed:', confirmation);\n} catch (err: any) {\n if (err.code === 4001) {\n console.log('User rejected the transaction');\n } else {\n console.error('Transaction failed:', err);\n }\n}\n```\n\n### Step 3: Sign without sending (sign-only flow)\n\nIf you need to sign a transaction without broadcasting it (e.g., for offline signing or multi-sig):\n\n**React:**\n\n```typescript\nconst { signTransaction } = useWallet();\n\nif (signTransaction) {\n const signedTransaction = await signTransaction(transaction);\n \u002F\u002F signedTransaction is now signed but NOT sent — broadcast manually if needed\n const rawTransaction = signedTransaction.serialize();\n const signature = await connection.sendRawTransaction(rawTransaction);\n}\n```\n\n**Browser (wallet-standard):**\n\n```typescript\nconst signFeature = wallet.features['solana:signTransaction'];\n\nconst [{ signedTransaction }] = await signFeature.signTransaction({\n account,\n transaction: transaction.serialize({ requireAllSignatures: false }),\n chain: 'solana:mainnet',\n});\n\n\u002F\u002F signedTransaction is serialized and signed — broadcast manually\nconst signature = await connection.sendRawTransaction(signedTransaction);\n```\n\n### Step 4: Send multiple transactions (batch)\n\nThere is **no** `solana:signAndSendAllTransactions` feature. The `solana:signAndSendTransaction` feature is **variadic** — pass multiple inputs and it returns one result per input:\n\n```typescript\nconst signAndSendFeature = wallet.features['solana:signAndSendTransaction'];\n\nconst results = await signAndSendFeature.signAndSendTransaction(\n { account, transaction: serializedTx1, chain: 'solana:mainnet' },\n { account, transaction: serializedTx2, chain: 'solana:mainnet' },\n { account, transaction: serializedTx3, chain: 'solana:mainnet' },\n);\n\nfor (const { signature } of results) {\n console.log('Tx signature:', bs58.encode(signature));\n}\n```\n\n### Step 5: Confirm the transaction\n\nAlways confirm after sending. Use `'confirmed'` commitment for most use cases:\n\n```typescript\nconst confirmation = await connection.confirmTransaction(signature, 'confirmed');\n\nif (confirmation.value.err) {\n console.error('Transaction failed on-chain:', confirmation.value.err);\n} else {\n console.log('Transaction succeeded');\n}\n```\n\n### Step 6: Error handling\n\n| Error | Cause | Action |\n|-------|-------|--------|\n| Code `4001` | User rejected in MetaMask | Show retry UI |\n| Code `-32002` | Request already pending | Wait for user to act in MetaMask |\n| `Blockhash not found` | Blockhash expired before submission | Fetch a new blockhash and rebuild |\n| `Insufficient funds` | Sender balance too low for transfer + fees | Show balance check UI |\n| `Transaction too large` | Transaction exceeds 1232 bytes | Split into multiple transactions |\n\n```typescript\ntry {\n const signature = await sendTransaction(transaction, connection);\n await connection.confirmTransaction(signature, 'confirmed');\n} catch (err: any) {\n switch (err.code) {\n case 4001:\n \u002F\u002F User rejected\n break;\n case -32002:\n \u002F\u002F Pending — ask user to check MetaMask\n break;\n default:\n if (err.message?.includes('Blockhash not found')) {\n \u002F\u002F Retry with fresh blockhash\n }\n console.error('Transaction error:', err);\n }\n}\n```\n\n## Important Notes\n\n- **Always fetch a fresh blockhash** — blockhashes expire after ~60 seconds. Fetch `getLatestBlockhash()` immediately before building the transaction, not at app startup.\n- **Set `feePayer` before signing** — the transaction must have `feePayer` and `recentBlockhash` set before it is signed or serialized.\n- **Serialize with `requireAllSignatures: false`** — when using wallet-standard features directly, the wallet will add the signature. Serializing with `requireAllSignatures: true` (the default) will throw because the transaction isn't signed yet.\n- **`sendTransaction` vs `signAndSendTransaction`** — in the React adapter, `sendTransaction` handles serialization internally. With wallet-standard features, you must serialize the transaction yourself and pass the bytes.\n- **`chain` is only honored by `signAndSendTransaction`** — `signAndSendTransaction` reads the input's `chain` to pick the cluster, but `signTransaction`\u002F`signMessage` ignore any `chain` field and use the **connected session scope** instead. Passing `chain` to `signTransaction` is harmless but doesn't switch networks; connect with the scope you want to sign on.\n- **Solana networks** — mainnet, devnet, and testnet scopes are all modeled by the SDK; non-mainnet availability depends on the connected MetaMask build\u002Fversion, so handle connection errors rather than assuming a cluster is present.\n- **`disconnect()` only revokes Solana scopes** — EVM sessions remain active.\n- **Chrome on Android** — apply the `beforeunload` workaround for the known page-unload bug during wallet interactions.\n- **Confirm before reporting success** — a submitted transaction is not finalized until `confirmTransaction` returns. 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