> For the complete documentation index, see [llms.txt](https://docs.hyperunit.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hyperunit.xyz/developers/key-addresses/mainnet/bitcoin.md).

# Bitcoin

Bitcoin deposits and withdrawals are supported between HyperCore and Bitcoin mainnet. Destination transactions are credited from Unit's respective treasury address.

<table><thead><tr><th width="150">Blockchain</th><th>Bitcoin Treasury Address</th></tr></thead><tbody><tr><td>Hyperliquid</td><td><pre><code>0x574bAFCe69d9411f662a433896e74e4F153096FA
</code></pre></td></tr><tr><td>Bitcoin</td><td><pre><code>bc1pdwu79dady576y3fupmm82m3g7p2p9f6hgyeqy0tdg7ztxg7xrayqlkl8j9
</code></pre></td></tr></tbody></table>

Unit Bitcoin is deployed on both HyperCore and the HyperEVM, and is fungible between these two execution environments. Users can [convert](https://hyperliquid.gitbook.io/hyperliquid-docs/for-developers/hyperevm/hypercore-less-than-greater-than-hyperevm-transfers#transferring-between-core-and-evm) their tokens by transferring tokens to the [Unit Bitcoin system address](#unit-bitcoin-system-address).

* Convert from HyperCore to HyperEVM using a spotSend action (or via the frontend)&#x20;
* Convert from HyperEVM to HyperCore with an ERC20 transfer.&#x20;

***NOTE:*** Due to the requirements of the orderbook, BTC has 10 `wei decimals` on HyperCore. It is recommended to only specify up to 8 decimal places (Satoshi-level precision) when converting HyperCore to HyperEVM. Beyond this, the [non-round amount is burned](https://hyperliquid.gitbook.io/hyperliquid-docs/for-developers/hyperevm/hypercore-less-than-greater-than-hyperevm-transfers#caveats) (guaranteed to be < 1 Satoshi). This is true for all spot tokens, including HYPE.

#### Unit Bitcoin System Address

```solidity
0x20000000000000000000000000000000000000c5
```

#### [Unit Bitcoin HyperCore Token Metadata](https://app.hyperliquid.xyz/explorer/token/0x8f254b963e8468305d409b33aa137c67)

<table><thead><tr><th width="206.1640625">Field</th><th>Value</th></tr></thead><tbody><tr><td>Name</td><td>BTC</td></tr><tr><td>Full Name</td><td>Unit Bitcoin</td></tr><tr><td>L1 Name</td><td>UBTC</td></tr><tr><td>Token Index</td><td>197</td></tr><tr><td>Max Supply</td><td>21,000,000</td></tr><tr><td>Min Lot Size</td><td>0.00001</td></tr><tr><td>Wei Size</td><td>0.0000000001</td></tr><tr><td>Token ID</td><td>0x8f254b963e8468305d409b33aa137c67</td></tr></tbody></table>

#### Unit Bitcoin HyperEVM Token Metadata

<table><thead><tr><th width="210.8984375">Field</th><th>Value</th></tr></thead><tbody><tr><td>Contract Address</td><td><pre><code>0x9FDBdA0A5e284c32744D2f17Ee5c74B284993463
</code></pre></td></tr><tr><td>Name</td><td>Unit Bitcoin</td></tr><tr><td>Symbol</td><td>UBTC</td></tr><tr><td>Decimals</td><td>8</td></tr><tr><td>Total Supply</td><td>21,000,000 * 10^8</td></tr></tbody></table>


---

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