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Struct relay_substrate_client::TransactionTracker

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pub struct TransactionTracker<C: Chain, E> { /* private fields */ }
Expand description

Substrate transaction tracker implementation.

Substrate node provides RPC API to submit and watch for transaction events. This way we may know when transaction is included into block, finalized or rejected. There are some edge cases, when we can’t fully trust this mechanism - e.g. transaction may broadcasted and then dropped out of node transaction pool (some other cases are also possible - node restarts, connection lost, …). Then we can’t know for sure - what is currently happening with our transaction. Is the transaction really lost? Is it still alive on the chain network?

We have several options to handle such cases:

  1. hope that the transaction is still alive and wait for its mining until it is spoiled;

  2. assume that the transaction is lost and resubmit another transaction instantly;

  3. wait for some time (if transaction is mortal - then until block where it dies; if it is immortal - then for some time that we assume is long enough to mine it) and assume that it is lost.

This struct implements third option as it seems to be the most optimal.

Implementations§

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impl<C: Chain, E: Environment<C>> TransactionTracker<C, E>

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pub fn new( environment: E, stall_timeout: Duration, transaction_hash: HashOf<C>, subscription: Subscription<TransactionStatusOf<C>>, ) -> Self

Create transaction tracker.

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pub fn switch_environment<NewE: Environment<C>>( self, environment: NewE, ) -> TransactionTracker<C, NewE>

Converts self into tracker with different environment.

Trait Implementations§

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impl<C: Chain, E: Environment<C>> TransactionTracker for TransactionTracker<C, E>

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type HeaderId = HeaderId<<C as Chain>::Hash, <C as Chain>::BlockNumber>

Header id, used by the chain.
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fn wait<'async_trait>( self, ) -> Pin<Box<dyn Future<Output = TrackedTransactionStatus<HeaderIdOf<C>>> + Send + 'async_trait>>
where Self: 'async_trait,

Wait until transaction is either finalized or invalidated/lost.

Auto Trait Implementations§

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impl<C, E> Freeze for TransactionTracker<C, E>
where E: Freeze, <C as Chain>::Hash: Freeze,

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impl<C, E> !RefUnwindSafe for TransactionTracker<C, E>

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impl<C, E> Send for TransactionTracker<C, E>
where E: Send,

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impl<C, E> !Sync for TransactionTracker<C, E>

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impl<C, E> Unpin for TransactionTracker<C, E>
where E: Unpin, <C as Chain>::Hash: Unpin,

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impl<C, E> !UnwindSafe for TransactionTracker<C, E>

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