Issue Details

Number

10389

Title

Add "effective fee rate" in rpc's mempool entries

Description

For both `getrawmempool true` and `getmempoolentry` it should probably have a field `effectivefeerate`. Where as "effective fee rate" is defined as what miners sort transactions by (when taking into consideration the whole CPFP stuff). I need this field for when trying to create my own CPFP transactions, but it's quite difficult to calculate myself (especially as the mempool entries don't have a "dependants" field, so you need to dump the whole mempool, which currently takes me about ~26 seconds alone). -- This is useful for when trying to do something like CPFP as you want to know the pre-existing fee rate. The term I use in my code that deals with this is "transaction cluster" which might make a decent term. It could expose a "clusterSize" and "clusterFee" so you can calculate the feerate (as well as know the total size of the cluster)

URL

https://github.com/bitcoin/bitcoin/issue/10389

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Notes

Attention of

Kill Factor (1-10)

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