def bob_chain():
chain = build(
MiningChain,
latest_mainnet_at(0),
disable_pow_check(),
genesis(),
)
return chain
def alice_chain(bob_chain):
bob_genesis = bob_chain.headerdb.get_canonical_block_header_by_number(0)
chain = build(
MiningChain,
latest_mainnet_at(0),
disable_pow_check(),
genesis(params={"timestamp": bob_genesis.timestamp}),
)
return chain
def _create(cls, model_class: Type[AsyncHeaderDB], *args: Any,
**kwargs: Any) -> AsyncHeaderDB:
headerdb = model_class(*args, **kwargs)
from eth.chains.base import Chain
from eth.tools.builder.chain import build, latest_mainnet_at, genesis
build(
Chain,
latest_mainnet_at(0),
genesis(db=headerdb.db),
)
return headerdb
def _create(cls, model_class: Type[AsyncHeaderDB], *args: Any,
**kwargs: Any) -> AsyncHeaderDB:
from eth.chains.base import Chain
from eth.tools.builder.chain import build, latest_mainnet_at, genesis
genesis_params = kwargs.pop('genesis_params', None)
headerdb = model_class(*args, **kwargs)
build(
Chain,
latest_mainnet_at(0),
genesis(db=headerdb.db, params=genesis_params),
)
return headerdb
def _create(cls, model_class: Type[AsyncHeaderDB], *args: Any,
**kwargs: Any) -> AsyncHeaderDB:
from eth.chains.base import Chain
from eth.tools.builder.chain import build, latest_mainnet_at, genesis
genesis_params = kwargs.pop('genesis_params', None)
headerdb = model_class(*args, **kwargs)
# SIDE EFFECT!
# This uses the side effect of initializing a chain using the `builder`
# tool to populate the genesis state into the database.
build(
Chain,
latest_mainnet_at(0),
genesis(db=headerdb.db, params=genesis_params),
)
return headerdb
def load_mining_chain(db):
GENESIS_PARAMS = {
'coinbase': ZERO_ADDRESS,
'difficulty': 5,
'gas_limit': 3141592,
'timestamp': 1514764800,
}
GENESIS_STATE = {
FUNDED_ACCT.public_key.to_canonical_address(): {
"balance": 100000000000000000,
}
}
return build(
AsyncMiningChain,
latest_mainnet_at(0),
enable_pow_mining(),
genesis(db=db, params=GENESIS_PARAMS, state=GENESIS_STATE),
)
