# Oracle

Our system has integrated different oracles to provide highly accurate price feeds for our users.&#x20;

Satoshi protects price accuracy by checking price staleness. The oracle updates its price when the value deviates beyond a specified threshold or when the heartbeat idle time has passed. Our protocol checks the timestamp and verifies that the latest answer is recent enough.

<table><thead><tr><th width="128">Chain</th><th width="138">Collateral</th><th width="185">Oracle</th><th>Parameter (deviation/heartbeat)</th></tr></thead><tbody><tr><td>BEVM</td><td>BTC</td><td><a href="https://www.diadata.org/#disable">DIA</a></td><td>0.5%/86400s</td></tr><tr><td>BEVM</td><td>wstBTC</td><td><a href="https://www.diadata.org/#disable">DIA</a> (BTC price) &#x26; <a href="https://scan-mainnet.bevm.io/address/0x26bda683F874e7AE3e3A5d3fad44Bcb82a7c107C">Bido contract</a> (wstBTC/stBTC rate)</td><td>0.5%/86400s</td></tr><tr><td>Bitlayer</td><td>WBTC</td><td><a href="https://www.apro.com/">APRO</a></td><td>0.5%/3600s</td></tr><tr><td>Bitlayer</td><td>stBTC</td><td><a href="https://www.apro.com/">APRO</a></td><td>0.5%/3600s</td></tr><tr><td>Bitlayer</td><td>USDT</td><td><a href="https://www.apro.com/">APRO</a></td><td>0.1%/86400s</td></tr><tr><td>Bitlayer</td><td>USDC</td><td><a href="https://www.apro.com/">APRO</a></td><td>0.1%/86400s</td></tr><tr><td>BOB</td><td>WETH</td><td><a href="https://api3.org/">API3</a></td><td>0.5%/86400s</td></tr><tr><td>BOB</td><td>WBTC</td><td><a href="https://api3.org/">API3</a></td><td>0.5%/86400s</td></tr><tr><td>BOB</td><td>tBTC</td><td><a href="https://www.diadata.org/#disable">DIA</a></td><td>0.5%/86400s</td></tr><tr><td>BOB</td><td>USDT</td><td><a href="https://www.diadata.org/#disable">DIA</a></td><td>0.5%/86400s</td></tr><tr><td>BOB</td><td>USDC</td><td><a href="../intro/introduction">DIA</a></td><td>0.5%/86400s</td></tr><tr><td>BOB</td><td>solvBTC</td><td><a href="https://www.apro.com/">APRO</a></td><td>0.5%/3600s</td></tr><tr><td>BOB</td><td>solvBTC.BBN</td><td><a href="https://www.apro.com/">APRO</a></td><td>0.5%/3600s</td></tr></tbody></table>
