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BlockStepController

tycho_simulation::evm::stream

Struct BlockStepController 

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

Handle returned by ProtocolStreamBuilder::with_step_controller that gives external control over when each buffered block is released for decoding.

Intended for complex test scenarios where the caller needs to observe what the next block contains before allowing the decoder pipeline to process it.

§Drop behaviour

Dropping this controller ungates the stream: the gating task detects the closed trigger channel, forwards the currently-buffered block (if any), then continues passing subsequent blocks through without waiting for triggers — exactly as if step-control had never been enabled. The stream runs to its natural end.

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impl BlockStepController

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pub fn trigger_next_block(&self) -> Result<(), SendError<()>>

Releases the next buffered block for decoding and emission.

Returns an error if the stream has already ended and the sender is disconnected.

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pub fn try_peek_next_block(&self) -> Option<FeedMessage<BlockHeader>>

Returns the currently buffered block immediately, or None if no block is buffered yet.

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pub async fn peek_next_block(&self) -> Option<FeedMessage<BlockHeader>>

Waits until a block is buffered and returns it without consuming it.

Returns None only if the stream has ended and no further blocks will arrive. If a block is already buffered when this is called, it returns immediately.

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