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July 3, 2019 06:12
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| from eth_keys import keys | |
| from eth_utils import decode_hex | |
| from eth_typing import Address | |
| from eth import constants | |
| from eth.chains.base import MiningChain | |
| from eth.consensus.pow import mine_pow_nonce | |
| from eth.vm.forks.byzantium import ByzantiumVM | |
| from eth.db.atomic import AtomicDB | |
| import logging | |
| import sys | |
| logging.basicConfig(stream=sys.stdout, level=0) | |
| GENESIS_PARAMS = { | |
| 'parent_hash': constants.GENESIS_PARENT_HASH, | |
| 'uncles_hash': constants.EMPTY_UNCLE_HASH, | |
| 'coinbase': constants.ZERO_ADDRESS, | |
| 'transaction_root': constants.BLANK_ROOT_HASH, | |
| 'receipt_root': constants.BLANK_ROOT_HASH, | |
| 'difficulty': 1, | |
| 'block_number': constants.GENESIS_BLOCK_NUMBER, | |
| 'gas_limit': 3141592, | |
| 'timestamp': 1514764800, | |
| 'extra_data': constants.GENESIS_EXTRA_DATA, | |
| 'nonce': constants.GENESIS_NONCE | |
| } | |
| SENDER_PRIVATE_KEY = keys.PrivateKey( | |
| decode_hex('0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8') | |
| ) | |
| SENDER = Address(SENDER_PRIVATE_KEY.public_key.to_canonical_address()) | |
| RECEIVER = Address(b'\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x02') | |
| klass = MiningChain.configure( | |
| __name__='TestChain', | |
| vm_configuration=( | |
| (constants.GENESIS_BLOCK_NUMBER, ByzantiumVM), | |
| )) | |
| chain = klass.from_genesis(AtomicDB(), GENESIS_PARAMS) | |
| vm = chain.get_vm() | |
| nonce = vm.state.get_nonce(SENDER) | |
| tx = vm.create_unsigned_transaction( | |
| nonce=nonce, | |
| gas_price=0, | |
| gas=100000, | |
| to=RECEIVER, | |
| value=0, | |
| data=b'', | |
| ) | |
| signed_tx = tx.as_signed_transaction(SENDER_PRIVATE_KEY) | |
| chain.apply_transaction(signed_tx) | |
| # We have to finalize the block first in order to be able read the | |
| # attributes that are important for the PoW algorithm | |
| block = chain.get_vm().finalize_block(chain.get_block()) | |
| # based on mining_hash, block number and difficulty we can perform | |
| # the actual Proof of Work (PoW) mechanism to mine the correct | |
| # nonce and mix_hash for this block | |
| nonce, mix_hash = mine_pow_nonce( | |
| block.number, | |
| block.header.mining_hash, | |
| block.header.difficulty | |
| ) | |
| print(chain.mine_block(mix_hash=mix_hash, nonce=nonce)) |
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