> For the complete documentation index, see [llms.txt](https://whisky.sidan.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whisky.sidan.io/tx-builder/getting-started/delegate-stake.md).

# Delegate Stake

### Build a transaction to (register stake certificate and) delegate stake to a pool

The following shows a simple example of building a transaction to (register stake certificate and) delegate stake to a pool for the first time.

```rust
use whisky::*;

pub fn delegate_stake(
    stake_key_hash: &str,
    pool_id: &str, // In the form of 'poolxxxxxx'
    my_address: &str,
    inputs: &[UTxO],
) -> Result<String, WError> {
    let mut tx_builder = TxBuilder::new_core();
    tx_builder
        .register_stake_certificate(stake_key_hash)
        .delegate_stake_certificate(stake_key_hash, pool_id)
        .change_address(my_address)
        .select_utxos_from(inputs, 5000000)
        .complete_sync(None)?;

    Ok(tx_builder.tx_hex())
}
```