def manifest_with_no_matching_deployments(w3, tmpdir, safe_math_manifest):
w3.testing.mine(5)
incorrect_genesis_hash = b"\x00" * 31 + b"\x01"
block = w3.eth.getBlock("earliest")
block_uri = create_block_uri(w3.toHex(incorrect_genesis_hash), w3.toHex(block.hash))
manifest = copy.deepcopy(safe_math_manifest)
manifest["deployments"][block_uri] = {
"SafeMathLib": {
"contract_type": "SafeMathLib",
"address": "0x8d2c532d7d211816a2807a411f947b211569b68c",
"transaction": "0xaceef751507a79c2dee6aa0e9d8f759aa24aab081f6dcf6835d792770541cb2b",
"block": "0x420cb2b2bd634ef42f9082e1ee87a8d4aeeaf506ea5cdeddaa8ff7cbf911810c",
}
}
return manifest
def create_latest_block_uri(w3: Web3, from_blocks_ago: int = 3) -> URI:
"""
Creates a block uri for the given w3 instance.
Defaults to 3 blocks prior to the "latest" block to accommodate for block reorgs.
If using a testnet with less than 3 mined blocks, adjust :from_blocks_ago:.
"""
chain_id = to_hex(get_genesis_block_hash(w3))
latest_block_tx_receipt = w3.eth.getBlock("latest")
target_block_number = latest_block_tx_receipt.number - from_blocks_ago
if target_block_number < 0:
raise Exception(
f"Only {latest_block_tx_receipt.number} blocks avaible on provided w3, "
f"cannot create latest block uri for {from_blocks_ago} blocks ago."
)
recent_block = to_hex(w3.eth.getBlock(target_block_number).hash)
return create_block_uri(chain_id, recent_block)