SolanaError when trying to sign a transaction to create an SPL token account

Embedded Wallets (Web3Auth)
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Hi loic — thanks for the clear report, this helps a lot. I see you’re reporting a SolanaError when calling signer.signTransactions() while trying to create an SPL token account. From your message I pulled these details:

  • SDK Details: MetaMask Embedded Wallets (Web3Auth)
  • Web3Auth / Embedded SDK version: @web3auth/node-sdk ^5.0.0 (plus @web3auth/base ^9.7.0)
  • Platform / Framework: Node.js
  • Solana libs: @solana/web3.js ^1.98.4, @solana/spl-token ^0.4.14
  • Code link you provided: privatebin link to index.js (you mentioned error at line 67)

To help the support team reproduce and resolve this quickly, please provide only the missing / relevant items below (you may already have some in the PrivateBin file — paste them here if easier):

  1. Exact error text / stack trace you see in the Node console (copy/paste). You referenced line 67, but I can’t open the PrivateBin — I need the error message here.
  2. The initialization & login snippet you use for Web3Auth / MetaMask Embedded (how you instantiate the wallet object and any login/connect call).
  3. The snippet where you build the transaction(s) and call signer.signTransactions() (or signTransaction/signAllTransactions) — include how many transactions you pass and their types (Transaction object vs serialized bytes).
  4. Which cluster are you targeting (devnet / testnet / mainnet) and the RPC endpoint.
  5. Any Node console logs around the call, and whether you’re setting feePayer and recentBlockhash on the Transaction(s).

Why I ask / likely causes and quick checks you can try now

  • Common causes for SolanaError when signing transactions:
    • The Transaction has no recentBlockhash or feePayer set — the wallet will often require these before signing. Fix: set tx.feePayer and tx.recentBlockhash = (await connection.getLatestBlockhash()).blockhash.
    • Passing the wrong type to the signer (e.g., serialized Uint8Array instead of Transaction objects, or mixing signed/unsigned txs). Ensure you pass Transaction instances (or the exact shape your signer expects).
    • Using the wrong signer method for your wallet (some wallets expose signTransaction or signAllTransactions rather than signTransactions). Check the wallet API you have from Web3Auth / Embedded SDK.
    • The payer / signer publicKey is not set or the wallet is not fully authenticated/connected.

Suggested minimal example pattern (Node + @solana/web3.js) — ensure your code follows these steps:

  • build Transaction: let tx = new Transaction().add(…instructions…);
  • set fee payer and recentBlockhash: tx.feePayer = payerPublicKey; tx.recentBlockhash = (await connection.getLatestBlockhash()).blockhash;
  • sign via wallet API (method name depends on implementation):
    • if your signer supports signTransaction: signed = await signer.signTransaction(tx);
    • if signAllTransactions / signTransactions accepts an array: signedArray = await signer.signAllTransactions([tx]);
  • send: await connection.sendRawTransaction(signed.serialize());

Helpful docs

If you can paste the three short things requested above (exact console error, the init/login code, and the transaction + signer call), I’ll read them and give a targeted fix (or a patch you can copy/paste). If you prefer, paste the relevant section of your PrivateBin file directly here.

Note: This response was generated by an AI bot and may require further verification. The MetaMask Community Team has tracked this issue and will be responding as soon as possible.

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