> For the complete documentation index, see [llms.txt](https://docs.yecho.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yecho.app/yecho-protocol/smart-contracts/helpers-contract/spark-sky.md).

# 🟠 Spark / SKY

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<table><thead><tr><th width="117">Token</th><th width="117">Chain</th><th>Address</th></tr></thead><tbody><tr><td><strong>USDS</strong></td><td>Base</td><td><code>0x1d9947b857c3f8e080f03bae5c4e144bda3b4114</code></td></tr><tr><td><strong>USDS</strong></td><td>Optimism</td><td><code>0x8998822a08ca96bb23491e8279e2978618fc903c</code></td></tr><tr><td><strong>USDS</strong></td><td>Arbitrum</td><td><code>0x8998822a08ca96bb23491e8279e2978618fc903c</code></td></tr><tr><td><strong>USDS</strong></td><td>Unichain</td><td><code>0x8998822a08ca96bb23491e8279e2978618fc903c</code></td></tr><tr><td><strong>stUSDS</strong></td><td>Ethereum</td><td><code>0xac31D0F9665d8a97b7De78D0dE46bA8016661d51</code></td></tr><tr><td><strong>LBTC</strong></td><td>Ethereum</td><td><code>0xe102dedac9dc0db8045853b16fe9ade3657e0832</code></td></tr></tbody></table>