03-stats.md

03 Blockchain and Mempool

Blocks

• GENESIS=bc getblockhash 0
• bc getblock $GENESIS | egrep "confirmations|tx|\"size\"|height|\"time\""
• bc getblock $GENESIS false | xxd -r -p

Blockchain

• bc getblockchaininfo | jq ".bip9_softforks"
• bc getmininginfo | grep networkhashps
• "pruning"
  • only save the last n MB of blocks
  • bd ... -prune=n

Mempool

• mempool consists of known transactions not (yet) in a block
• bc getmempoolinfo
• bd ... -blocksonly
  • no tx relay, no mempool, no compact blocks
• bd ... -minrelaytxfee=0.0001
  • can prevent gossip spam
• txfee
  • FEEPERKB=bc estimatefee 3
  • python -c "print 960 * $FEEPERKB * 1.0/4, 'approx. USD per median tx'"