34 lines
1.1 KiB
Rust
34 lines
1.1 KiB
Rust
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use super::{Error, Invalid, Outcome};
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/// Check that an attestation is valid to be included in some block.
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pub fn validate_attestation_for_block<T>(
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attestation_slot: u64,
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block_slot: u64,
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parent_block_slot: u64,
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min_attestation_inclusion_delay: u64,
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epoch_length: u64,
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) -> Result<Outcome, Error> {
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/*
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* There is a delay before an attestation may be included in a block, quantified by
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* `slots` and defined as `min_attestation_inclusion_delay`.
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*
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* So, an attestation must be at least `min_attestation_inclusion_delay` slots "older" than the
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* block it is contained in.
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*/
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verify_or!(
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attestation_slot <= block_slot.saturating_sub(min_attestation_inclusion_delay),
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reject!(Invalid::AttestationTooRecent)
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);
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/*
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* A block may not include attestations reference slots more than an epoch length + 1 prior to
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* the block slot.
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*/
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verify_or!(
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attestation_slot >= parent_block_slot.saturating_sub(epoch_length + 1),
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reject!(Invalid::AttestationTooOld)
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);
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accept!()
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}
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