Feature Summary
đ Overview
Smart contracts on Hemi can access Bitcoin data by calling the hVM precompile contract addresses, which query the deterministic TBC node running inside the EVM.
Future protocol upgrades will add additional precompile calls to provide additional information like Bitcoin fee levels, Bitcoin block construction information, and popular metaprotocols like Ordinals, BRC-20s, and Runes.
âšī¸ "Phase 0" Precompile Summary
| Name | Address | Description |
|---|---|---|
BtcBalAddr | 0x40 | Gets the balance of an address in satoshis. Supports all address formats: P2PKH, P2SH, P2WPKH, P2WSH, P2TR. |
BtcUtxosAddrList | 0x41 | Gets the list of Unspent Transaction Outputs (UTXOs) for an address. Supports pagination. |
BtcTxByTxid | 0x42 | Gets parts of a Bitcoin transaction by its TxID. The caller can specify which part(s) of the transaction to return using packed bitflags to increase gas efficiency by dropping unnecessary data. |
BtxTxConfirmations | 0x43 | Gets the number of confirmations a specified transaction by TxID has. |
BtcLastHeader | 0x44 | Gets the most recent Bitcoin header known by hVM. |
BtcHeaderN | 0x45 | Gets the canonical Bitcoin header at height N. |
BtcAddrToScript | 0x46 | Converts a Bitcoin address to its corresponding script representation. Supports all address formats: P2PKH, P2SH, P2WPKH, P2WSH, P2TR. |
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