def test_reward_uncles(db):
"""
B0 B1 B2
B0 Uncle
We raise the block's coinbase account by Rb, the block reward,
and also add uncle and nephew rewards
"""
k, v, k2, v2 = accounts()
chain = Chain({}, difficulty=1)
blk0 = mine_on_chain(chain, coinbase=decode_hex('0' * 40))
local_coinbase = decode_hex('1' * 40)
uncle_coinbase = decode_hex('2' * 40)
# Mine the uncle
uncle = mine_on_chain(chain, blk0, coinbase=uncle_coinbase)
assert chain.state.get_balance(
uncle_coinbase) == 1 * chain.env.config['BLOCK_REWARD']
# Mine the first block in the "intended main chain"
blk1 = mine_on_chain(chain, blk0, coinbase=local_coinbase)
# next block should reward uncles
blk2 = mine_on_chain(chain, blk1, coinbase=local_coinbase)
# print [x.hash for x in chain.get_chain()], [blk0.hash, uncle.hash,
# blk1.hash, blk2.hash]
assert blk1.hash in chain
assert uncle.header.hash in [u.hash for u in blk2.uncles]
assert chain.head == blk2
assert chain.get_chain() == [blk0, blk1, blk2]
assert chain.state.get_balance(local_coinbase) == \
2 * chain.env.config['BLOCK_REWARD'] + \
chain.env.config['NEPHEW_REWARD']
assert chain.state.get_balance(
uncle_coinbase) == chain.env.config['BLOCK_REWARD'] * 7 // 8
def test_genesis_chain(db):
k, v, k2, v2 = accounts()
chain = Chain({v: {"balance": utils.denoms.ether * 1}}, difficulty=1)
blk = mine_on_chain(chain)
print('blook', blk)
assert chain.has_block(blk.hash)
assert blk.hash in chain
assert chain.get_block(blk.hash) == blk
assert chain.head == blk
assert chain.get_children(blk) == []
assert chain.get_chain() == [blk]
assert chain.get_block_by_number(1)
assert not chain.get_block_by_number(2)
assert chain.get_block_by_number(1) == blk
def test_simple_chain(db):
k, v, k2, v2 = accounts()
chain = Chain({v: {"balance": utils.denoms.ether * 1}}, difficulty=1)
tx = get_transaction()
blk2 = mine_next_block(chain, transactions=[tx])
blk3 = mine_next_block(chain)
assert blk2.hash in chain
assert blk3.hash in chain
assert chain.has_block(blk2.hash)
assert chain.has_block(blk3.hash)
assert chain.get_block(blk2.hash) == blk2
assert chain.get_block(blk3.hash) == blk3
assert chain.head == blk3
assert chain.get_children(blk2) == [blk3]
assert chain.get_chain() == [blk2, blk3]
assert chain.get_block_by_number(1) == blk2
assert chain.get_block_by_number(2) == blk3
assert not chain.get_block_by_number(3)
assert chain.get_tx_position(tx.hash) == (blk2.number, 0)