def make_blocks(count,
nonce_base=30000,
previous_block_hash=HASH_INITIAL_BLOCK):
blocks = []
for i in range(count):
s = i * nonce_base
txs = [coinbase_tx(i + 1)] + [make_tx(i) for i in range(s, s + 8)]
nonce = s
while True:
merkle_root = merkle([tx.hash() for tx in txs])
block = Block(version=1,
previous_block_hash=previous_block_hash,
merkle_root=merkle_root,
timestamp=GENESIS_TIME + i * 600,
difficulty=i,
nonce=nonce)
block.set_txs(txs)
if block.hash()[-1] == i & 0xff:
break
nonce += 1
blocks.append(block)
previous_block_hash = block.hash()
return blocks
