# USD0a

<table data-card-size="large" data-view="cards"><thead><tr><th align="center"></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td align="center"><strong>USD0a</strong> <strong>DAO Collateral Smart Contract</strong></td><td><a href="usd0a/usd0a-daocollateral">usd0a-daocollateral</a></td><td data-object-fit="cover"><a href="https://1503334455-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpUhQzPJGdJzuLTQ5sCym%2Fuploads%2Fs03nwUaWtx0ACaNQKxRX%2FCard%20Cover%2041.png?alt=media&#x26;token=99184f18-f0bd-43c2-a680-60f8d304eff3">Card Cover 41.png</a></td></tr><tr><td align="center"><strong>USD0a</strong> <strong>Swapper Engine Smart Contract</strong></td><td><a href="usd0a/usd0a-swapperengine">usd0a-swapperengine</a></td><td data-object-fit="cover"><a href="https://1503334455-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpUhQzPJGdJzuLTQ5sCym%2Fuploads%2FEAXcO5aCmFvNWZ0zLCW1%2FCard%20Cover%2054.png?alt=media&#x26;token=9ac7d7ae-2286-4dca-8f0c-0b4adc72bc3a">Card Cover 54.png</a></td></tr><tr><td align="center"><strong>USD0a Gateway Smart Contract</strong></td><td><a href="usd0a/usd0a-gateway">usd0a-gateway</a></td><td><a href="https://1503334455-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpUhQzPJGdJzuLTQ5sCym%2Fuploads%2FFfoKjESCGHw9mhoQQkvJ%2FCard%20Cover%2013.png?alt=media&#x26;token=c4f43a83-b4d3-48b1-a4a0-bb4e28a7bfb1">Card Cover 13.png</a></td></tr><tr><td align="center">USD0a Reverse Gateway Smart Contract</td><td><a href="usd0a/usd0a-reverse-gateway">usd0a-reverse-gateway</a></td><td><a href="https://1503334455-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpUhQzPJGdJzuLTQ5sCym%2Fuploads%2FduHCoYbjgEjgJBMjjcHp%2FCard%20Cover%2013.png?alt=media&#x26;token=6fb75bc2-9a5a-4523-9eed-b00ec2dd5b0d">Card Cover 13.png</a></td></tr></tbody></table>