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16 lines
665 B
TeX
16 lines
665 B
TeX
\section{Gas-Free Meta-Transactions}
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QuantumSwap implements ERC-2771~\cite{erc2771} compliant
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meta-transactions. Users sign transactions off-chain; a trusted
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forwarder contract verifies the signature and forwards the call to the
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AMM, paying gas on the user's behalf. This eliminates the gas barrier
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for new users.
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Formally, a meta-transaction $M = (\mathit{to}, \mathit{value},
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\mathit{data}, \mathit{sig})$ is a standard transaction with the sender
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address derived from $\mathit{sig}$ rather than from \texttt{msg.sender}.
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The forwarder verifies $\mathit{sig}$ against a nonce to prevent replay.
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%% ============================================================
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