# Balance transfer (/docs/guides/evm/precompiles/balance-transfer)

| Property            | Value                                        |
| ------------------- | -------------------------------------------- |
| Rust implementation | `BalanceTransferPrecompile`                  |
| Solidity interface  | `ISubtensorBalanceTransfer`                  |
| Address             | `0x0000000000000000000000000000000000000800` |
| Status              | Deployed                                     |

Transfers the EVM call value to the Substrate account supplied as a 32-byte
public key.

## Functions [#functions]

| Function            | Mutability |
| ------------------- | ---------- |
| `transfer(bytes32)` | `payable`  |

## Added operations [#added-operations]

| Function            | Source extrinsic               |
| ------------------- | ------------------------------ |
| `transferKeepAlive` | `Balances.transfer_keep_alive` |
| `transferAll`       | `Balances.transfer_all`        |

The existing `transfer(bytes32)` semantically covers
`Balances.transfer_allow_death` by taking the amount from attached EVM value.
The added functions use explicit typed arguments where attached value does
not express the complete source operation. They dispatch the highest-level
Balances call as the mapped signer. `force_transfer` requires Root and the
feature-gated development faucet is not part of the production interface.

Source: [`balanceTransfer.sol`](https://github.com/RaoFoundation/subtensor/blob/main/precompiles/src/solidity/balanceTransfer.sol)