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BlockHeaderSub

avail_rust_client::subscription::block

Struct BlockHeaderSub 

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pub struct BlockHeaderSub { /* private fields */ }
Expand description

Subscription that mirrors Sub but yields AvailHeader.

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impl BlockHeaderSub

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pub fn new(client: Client) -> Self

Creates a new AvailHeader subscription. Creates a subscription that yields legacy blocks as you iterate.

The client is cloned and no network traffic occurs until LegacyBlockSub::next or LegacyBlockSub::prev is awaited.

§Arguments
  • client - Client used to drive the subscription.
§Returns

Returns a LegacyBlockSub ready to iterate over legacy blocks.

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pub async fn next(&mut self) -> Result<Option<AvailHeader>, Error>

Returns the next AvailHeader matching the underlying Sub::next cursor.

When the RPC call fails, the internal height is rewound so the same block can be retried.

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pub async fn prev(&mut self) -> Result<Option<AvailHeader>, Error>

Returns the previous AvailHeader using Sub::prev as the cursor source.

When the RPC call fails, the internal height is rewound so the same block can be retried.

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pub fn should_retry_on_error(&self) -> bool

Reports whether the subscription retries after RPC failures.

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pub fn use_best_block(&mut self, value: bool)

Follow best blocks instead of finalized ones.

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pub fn set_block_height(&mut self, block_height: u32)

Jump the cursor to a specific starting height.

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pub fn set_pool_rate(&mut self, value: Duration)

Change how often we poll for new blocks.

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pub fn set_retry_on_error(&mut self, value: Option<bool>)

Choose whether this subscription should retry after RPC failures.

Trait Implementations§

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impl Clone for BlockHeaderSub

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fn clone(&self) -> BlockHeaderSub

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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