Mempool cluster limits#2063
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…tes to RunOptions; fix test wallet_high_fee.py
…the size of a single tx. Update the changelog.
This was referenced May 22, 2026
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Mempool will now reject a tx if adding it would form a cluster with tx count or byte size above the limits.
I also exposed MempoolConfig in the node RPC. At the moment, the wallet only uses it to limit the single tx size in places where
chain_config.max_tx_size_for_mempool()was previously used. Note that this single tx size limiting isn't (and wasn't) particularly accurate, but fixing it here doesn't make much sense. IMO the wallet's whole utxo selection mechanism has to be revamped, I added the corresponding TODOs.