Message signing

Managed EVM smart accounts validate off-chain signatures through ERC-1271. The SDK returns the validator and account envelopes expected by the configured account implementation. Signatures are chain-specific. Always pass the chain on which the verifier will call the smart account.

These off-chain signing methods and ERC-1271/ERC-6492 envelopes are EVM-only. A Solana-only account does not expose signMessage or signTypedData through this account API. Use signTransaction for prepared Solana intents; a viem owner’s message-signing callback used internally is not a Solana off-chain signature-verification standard. See Solana support.

Sign an EIP-191 message

const signature = await rhinestoneAccount.signMessage(
  "Hello, world!",
  base,
  undefined,
);

Pass raw bytes when the application already has a hex payload:

const signature = await rhinestoneAccount.signMessage(
  { raw: "0x1234" },
  base,
  undefined,
);

Sign EIP-712 typed data

const signature = await rhinestoneAccount.signTypedData(
  {
    domain: {
      name: "Ether Mail",
      version: "1",
      chainId: base.id,
      verifyingContract: "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC",
    },
    types: {
      Person: [
        { name: "name", type: "string" },
        { name: "wallet", type: "address" },
      ],
      Mail: [
        { name: "from", type: "Person" },
        { name: "to", type: "Person" },
        { name: "contents", type: "string" },
      ],
    },
    primaryType: "Mail",
    message: {
      from: {
        name: "Cow",
        wallet: "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826",
      },
      to: {
        name: "Bob",
        wallet: "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB",
      },
      contents: "Hello, Bob!",
    },
  },
  base,
  undefined,
);

Keep the typed-data domain’s chainId consistent with the application protocol. The separate chain argument selects the account and validator context used to package the signature.

Choose a signer set

Pass undefined to use the account’s configured owners. To sign with an enabled session key, pass that session explicitly:

const signature = await rhinestoneAccount.signTypedData(typedData, base, {
  type: "session",
  session,
});

The session’s signing mode must allow the payload. Disabled sessions reject both methods. Scoped typed-data signing is configured on-chain but direct scoped signature emission is not available in SDK 3.0.0.

Deployed and undeployed accounts

For an undeployed smart account, the SDK wraps the result with ERC-6492 deployment data. The verifying application must support ERC-6492 to validate that signature. Deployed accounts return the normal ERC-1271-compatible envelope.

EOA account mode does not produce packed smart-account signatures through these methods. Call the EOA’s viem signing method directly when the verifier expects an EOA signature.

Account setup

Recovery

Signing

Configuration

Integration

SDK reference

Sign an EIP-191 message

Sign EIP-712 typed data

Choose a signer set

Deployed and undeployed accounts

​Sign an EIP-191 message

​Sign EIP-712 typed data

​Choose a signer set

​Deployed and undeployed accounts

Sign an EIP-191 message

Sign EIP-712 typed data

Choose a signer set

Deployed and undeployed accounts