Question

Is this the same as approving a contract on MetaMask?

Answer

No. Signing = proof of identity (safe, no gas). Approving a contract = giving permission to spend tokens (not used for login).

Last updated:

July 1, 2026

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Do I need to sign every time I log in?

No, you only need to approve Sandwich as an integrator once per account. Sandwich will then be approved as an integrator until our integrator approval expires or you revoke our integrator approval. You can revoke integrator approval at any time.

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Can Lighter ever access or move my funds through message signing?

No. Message signing cannot move assets. Only blockchain transactions that you explicitly approve can transfer funds.

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Why does Lighter require signing instead of a password?

Signing is more secure. It proves ownership of your wallet cryptographically, eliminating weak passwords and reducing phishing risks.

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Does Lighter store my private key?

No. Your private key remains inside your wallet. Lighter only receives the signed message, never your private key.

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What exactly am I signing?

You are signing a human-readable message that proves wallet ownership. Lighter does not ask you to sign anything that gives permission to move funds.

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