# Key Components

The Most Bridge is made up of 5 main components:

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td></td><td>Escrow Smart Contract</td><td></td><td><a href="escrow">escrow</a></td></tr><tr><td></td><td>Payment Registry Smart Contract</td><td></td><td><a href="payment-registry">payment-registry</a></td></tr><tr><td></td><td>Operator Service</td><td></td><td><a href="operator-service">operator-service</a></td></tr><tr><td></td><td>HDP Module</td><td></td><td><a href="hdp-module">hdp-module</a></td></tr><tr><td></td><td>Hook Executor</td><td></td><td><a href="hook-executor">hook-executor</a></td></tr></tbody></table>