Title: Transaction options for bitcoind Post by: cabin on November 02, 2012, 03:52:34 PM Are there ways to configure bitcoin.conf so that it only accepts at most say 500 transactions into the next block, or only those transactions with a fee > 0? I thought I remember seeing development on this but not sure where it went and I can't find any recent docs on it.
Title: Re: Transaction options for bitcoind Post by: Gavin Andresen on November 02, 2012, 06:10:52 PM The relevant settings and their default values for recent versions of bitcoind are:
Code: Maximum size, in bytes, of blocks you create: So if you set blockprioritysize=0, you will only accept fee-paying transactions. If you only want to accept 500 or so transactions, set the blocksize to 500 * average transaction size (400 bytes or so) = 200000 The rules for filling up the block are: First, take the highest priority transactions (regardless of fee) and fill up the block to blockprioritysize. (if blockprioritysize is zero, then this step does not apply) Then, take the highest fee-per-kilobyte transactions and continue filling the block until either you run out of transactions with a fee-per-kilobyte greater than mintxfee or the block would be larger than blockmaxsize. Finally: the rules are likely to change again fairly soon so that groups of related transactions are considered together ("child pays for parent", so customers can send zero-fee transactions to merchants, who can create a child transaction with a fee when they need the transaction to be confirmed). Title: Re: Transaction options for bitcoind Post by: cabin on November 03, 2012, 12:17:03 PM Thanks, those settings are working perfectly for me.
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