def dict_to_spoof_transaction(
chain: BaseAsyncChain, header: BlockHeader,
transaction_dict: Dict[str, Any]) -> SpoofTransaction:
"""
Convert dicts used in calls & gas estimates into a spoof transaction
"""
txn_dict = normalize_transaction_dict(transaction_dict)
sender = txn_dict.get('from', ZERO_ADDRESS)
if 'nonce' in txn_dict:
nonce = txn_dict['nonce']
else:
vm = chain.get_vm(header)
nonce = vm.state.account_db.get_nonce(sender)
gas_price = txn_dict.get('gasPrice', 0)
gas = txn_dict.get('gas', header.gas_limit)
unsigned = chain.get_vm_class(header).create_unsigned_transaction(
nonce=nonce,
gas_price=gas_price,
gas=gas,
to=txn_dict['to'],
value=txn_dict['value'],
data=txn_dict['data'],
)
return SpoofTransaction(unsigned, from_=sender)
async def get_header(chain: BaseAsyncChain, at_block: Union[str, int]) -> BlockHeader:
if at_block == 'pending':
raise NotImplementedError("RPC interface does not support the 'pending' block at this time")
elif at_block == 'latest':
at_header = chain.get_canonical_head()
elif at_block == 'earliest':
# TODO find if genesis block can be non-zero. Why does 'earliest' option even exist?
block = await chain.coro_get_canonical_block_by_number(BlockNumber(0))
at_header = block.header
# mypy doesn't have user defined type guards yet
# https://github.com/python/mypy/issues/5206
elif is_integer(at_block) and at_block >= 0: # type: ignore
block = await chain.coro_get_canonical_block_by_number(BlockNumber(0))
at_header = block.header
else:
raise TypeError("Unrecognized block reference: %r" % at_block)
return at_header
def block_to_dict(block: BaseBlock,
chain: BaseAsyncChain,
include_transactions: bool) -> Dict[str, Union[str, List[str]]]:
header_dict = header_to_dict(block.header)
block_dict: Dict[str, Union[str, List[str]]] = dict(
header_dict,
totalDifficulty=hex(chain.get_score(block.hash)),
uncles=[encode_hex(uncle.hash) for uncle in block.uncles],
size=hex(len(rlp.encode(block))),
)
if include_transactions:
# block_dict['transactions'] = map(transaction_to_dict, block.transactions)
raise NotImplementedError("Cannot return transaction object with block, yet")
else:
block_dict['transactions'] = [encode_hex(tx.hash) for tx in block.transactions]
return block_dict
async def account_db_at_block(chain: BaseAsyncChain,
at_block: Union[str, int],
read_only: bool = True) -> BaseAccountDB:
at_header = await get_header(chain, at_block)
vm = chain.get_vm(at_header)
return vm.state.account_db
