55ccff7604
* skips retransmit for shreds with unknown slot leader (#19472)
Shreds' signatures should be verified before they reach retransmit
stage, and if the leader is unknown they should fail signature check.
Therefore retransmit-stage can as well expect to know who the slot
leader is and otherwise just skip the shred.
Blockstore checking signature of recovered shreds before sending them to
retransmit stage:
https://github.com/solana-labs/solana/blob/4305d4b7b/ledger/src/blockstore.rs#L884-L930
Shred signature verifier:
https://github.com/solana-labs/solana/blob/4305d4b7b/core/src/sigverify_shreds.rs#L41-L57
https://github.com/solana-labs/solana/blob/4305d4b7b/ledger/src/sigverify_shreds.rs#L105
(cherry picked from commit 6d9818b8e4)
# Conflicts:
# core/src/broadcast_stage/broadcast_duplicates_run.rs
# ledger/src/shred.rs
* removes backport merge conflicts
Co-authored-by: behzad nouri <behzadnouri@gmail.com>