papers/hanzo-checkout/sections/06-implementation.tex

\section{Implementation}


\subsection{System Components}

The Hanzo Checkout system comprises:

\begin{itemize}
    \item \textbf{Checkout API}: RESTful interface for merchants (Node.js)
    \item \textbf{Recognition Service}: Customer identification (Go)
    \item \textbf{Vault}: PCI-compliant credential storage (Rust)
    \item \textbf{Orchestrator}: Payment routing engine (Go)
    \item \textbf{Analytics}: Real-time metrics and monitoring (Python)
\end{itemize}

\subsection{Latency Optimization}

Sub-200ms latency achieved through:

\begin{itemize}
    \item Connection pooling to payment gateways
    \item Geographic distribution (5 regions)
    \item Predictive preloading of customer data
    \item Asynchronous capture after authorization
\end{itemize}

\begin{table}[h]
\centering
\caption{Latency Breakdown (P95)}
\begin{tabular}{lc}
\toprule
\textbf{Phase} & \textbf{Latency (ms)} \\
\midrule
Customer Recognition & 23 \\
Token Retrieval & 12 \\
Gateway Authorization & 142 \\
Response Generation & 8 \\
\midrule
\textbf{Total} & \textbf{185} \\
\bottomrule
\end{tabular}
\end{table}