Suhas Daftuar 12c469b236 [Mempool] Fix mempool limiting and replace-by-fee for PrioritiseTransaction ...

1) Fix mempool limiting for PrioritiseTransaction

Redo the feerate index to be based on mining score, rather than fee.

Update mempool_packages.py to test prioritisetransaction's effect on
package scores.

2) Update replace-by-fee logic to use fee deltas

3) Use fee deltas for determining mempool acceptance

4) Remove GetMinRelayFee

One test in AcceptToMemoryPool was to compare a transaction's fee
agains the value returned by GetMinRelayFee. This value was zero for
all small transactions.  For larger transactions (between
DEFAULT_BLOCK_PRIORITY_SIZE and MAX_STANDARD_TX_SIZE), this function
was preventing low fee transactions from ever being accepted.

With this function removed, we will now allow transactions in that range
with fees (including modifications via PrioritiseTransaction) below
the minRelayTxFee, provided that they have sufficient priority.

Github-Pull: #7062
Rebased-From: eb306664e7 9ef2a25603 27fae3484c 901b01d674

2015-12-21 17:19:53 +01:00

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