app: 🦅 Consensus::end_block never errors
#4011
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`Consensus::end_block` never returns an `Err(_)` value, so it does not need to return a `Result<T, E>`.
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fixes #3966. fixes #3908. fixes _part of_ #3995. this branch introduces the first steps towards mock consensus (#3588) testing of the staking component (#3845). this defines a validator after genesis, and then shows that it does _not_ enter the consensus set. #3966 is addressed in this branch so that the existing genesis validator correctly enters the consensus set, and so that we can successfully progress to the second epoch. subsequent changes will exercise delegating to this validator in the `mock_consensus_can_define_and_delegate_to_a_validator`. #### ✨ changes * alters `with_penumbra_auto_app_state` so that it adds an allocation of delegation tokens to the shielded pool component's genesis content. * extends `generate_penumbra_validator` so that it generates a real spend key, and returns an `Allocation` for the generated validator. _(see #3966)_ * adds a new `mock_consensus_can_define_and_delegate_to_a_validator` test that defines a post-genesis validator. _(see #3908)_ * defines a new `ConsensusIndexRead::get_consensus_set()` method, which collects all of the identity keys returned by `consensus_set_stream`. * lowers the events in `penumbra_mock_consensus::block::Builder::execute()` to trace-level events. * `penumbra_mock_consensus::builder::Builder` will now log a warning if values may be errantly rewritten by the builder methods. * `TestNode::fast_forward` sets its `i` span field to `1..n`, rather than `0..n-1`. --- #### :link: related * #4009 * #4010 * #4011 * #4017 * #4027 * #4028 * #4029 * #3966 * #3908 * #3588 --------- Co-authored-by: Henry de Valence <hdevalence@penumbralabs.xyz>
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Consensus::end_blocknever returns anErr(_)value, so it does not need to return aResult<T, E>.cherry-picked out ouf #4001.