Find an interval within the Steem blockchain

blocksByDate.py

#!/usr/bin/python3

from steem import Steem
from pprint import pprint
import sys

startTime = "2018-05-01T00:00:00"
endTime = "2018-05-31T23:59:59"

if len( sys.argv ) > 1:
    startTime = sys.argv[1]

if len( sys.argv ) > 2:
    endTime = sys.argv[2]

s = Steem()

lastBlock = s.head_block_number

upperBound = lastBlock
lowerBound = 1
midpoint = None

while lowerBound + 1 < upperBound:
    probe = ( upperBound + lowerBound) // 2
    b = s.get_block_header( probe )
    print( "block", probe, b['timestamp'] )
    if b['timestamp'] < startTime:
        lowerBound = probe
    elif b['timestamp'] > endTime:
        upperBound = probe
    else:
        midpoint = probe
        break

tooLarge = midpoint
while lowerBound + 1 < tooLarge:
    probe = (lowerBound + tooLarge) // 2
    b = s.get_block_header( probe )
    print( "block", probe, b['timestamp'] )
    if b['timestamp'] <= startTime:
        lowerBound = probe
    else:
        tooLarge = probe

tooSmall = midpoint
while tooSmall + 1 < upperBound:
    probe = ( tooSmall + upperBound ) // 2
    b = s.get_block_header( probe )
    print( "block", probe, b['timestamp'] )
    if b['timestamp'] <= endTime:
        tooSmall = probe
    else:
        upperBound = probe

firstBlock = s.get_block_header( lowerBound )
lastBlock = s.get_block_header( upperBound - 1 )

print( "First block:", lowerBound, firstBlock['timestamp'] )
print( "Last block:", upperBound - 1, lastBlock['timestamp'] )