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'"