You can use produce_blocks to help achieve an arbitrary block height; this is useful when you want to do any testing regarding transaction maturity.
Note: For the
produce_blocksAPI to work, it is imperative to havemanual_blocks_enabled = truein the config for the running node. See example below.
let config = Config {
manual_blocks_enabled: true, // Necessary so the `produce_blocks` API can be used locally
..Config::local_node()
};
let wallets =
launch_custom_provider_and_get_wallets(WalletsConfig::default(), Some(config), None).await;
let wallet = &wallets[0];
let provider = wallet.try_provider()?;
assert_eq!(provider.latest_block_height().await?, 0u32);
provider.produce_blocks(3, None).await?;
assert_eq!(provider.latest_block_height().await?, 3u32);You can also set a custom block time as the second, optional argument. Here is an example:
let block_time = 20u32; // seconds
let config = Config {
manual_blocks_enabled: true, // Necessary so the `produce_blocks` API can be used locally
// This is how you specify the time between blocks
block_production: Trigger::Interval {
block_time: std::time::Duration::from_secs(block_time.into()),
},
..Config::local_node()
};
let wallets =
launch_custom_provider_and_get_wallets(WalletsConfig::default(), Some(config), None).await;
let wallet = &wallets[0];
let provider = wallet.try_provider()?;
assert_eq!(provider.latest_block_height().await?, 0u32);
let origin_block_time = provider.latest_block_time().await?.unwrap();
let blocks_to_produce = 3u32;
provider
.produce_blocks(blocks_to_produce.into(), None)
.await?;
assert_eq!(provider.latest_block_height().await?, blocks_to_produce);
let expected_latest_block_time = origin_block_time
.checked_add_signed(Duration::seconds((blocks_to_produce * block_time) as i64))
.unwrap();
assert_eq!(
provider.latest_block_time().await?.unwrap(),
expected_latest_block_time
);