303 lines
12 KiB
Python
303 lines
12 KiB
Python
# standard imports
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import logging
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# external imports
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from chainlib.chain import ChainSpec
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from chainlib.eth.unittest.ethtester import create_tester_signer
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from chainlib.eth.unittest.base import TestRPCConnection
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from chainlib.eth.tx import (
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receipt,
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Tx,
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)
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from chainlib.eth.nonce import RPCNonceOracle
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from chainlib.eth.gas import (
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OverrideGasOracle,
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Gas,
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)
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from chainlib.eth.address import to_checksum_address
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from chainlib.eth.block import (
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block_latest,
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block_by_number,
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block_by_hash,
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)
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from crypto_dev_signer.keystore.dict import DictKeystore
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from crypto_dev_signer.eth.signer import ReferenceSigner as EIP155Signer
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from hexathon import (
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strip_0x,
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add_0x,
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)
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# local imports
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from erc20_demurrage_token import DemurrageToken
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from erc20_demurrage_token.sim.error import TxLimitException
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logg = logging.getLogger(__name__)
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class DemurrageTokenSimulation:
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def __init__(self, chain_str, settings, redistribute=True, cap=0, actors=1):
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self.chain_spec = ChainSpec.from_chain_str(chain_str)
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self.accounts = []
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self.redistribute = redistribute
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self.keystore = DictKeystore()
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self.signer = EIP155Signer(self.keystore)
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self.eth_helper = create_tester_signer(self.keystore)
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self.eth_backend = self.eth_helper.backend
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self.gas_oracle = OverrideGasOracle(limit=100000, price=1)
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self.rpc = TestRPCConnection(None, self.eth_helper, self.signer)
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for a in self.keystore.list():
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self.accounts.append(add_0x(to_checksum_address(a)))
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settings.sink_address = self.accounts[0]
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self.actors = []
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for i in range(actors):
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idx = i % 10
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address = self.keystore.new()
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self.actors.append(address)
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self.accounts.append(address)
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nonce_oracle = RPCNonceOracle(self.accounts[idx], conn=self.rpc)
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c = Gas(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
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(tx_hash, o) = c.create(self.accounts[idx], address, 100000 * 1000000)
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self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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if r['status'] != 1:
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raise RuntimeError('failed gas transfer to account #{}: {} from {}'.format(i, address, self.accounts[idx]))
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logg.info('added actor account #{}: {} block {}'.format(i, address, r['block_number']))
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.constructor(self.accounts[0], settings, redistribute=redistribute, cap=cap)
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self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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if (r['status'] != 1):
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raise RuntimeError('contract deployment failed')
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self.address = r['contract_address']
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logg.info('deployed contract to {} block {}'.format(self.address, r['block_number']))
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o = block_latest()
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r = self.rpc.do(o)
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self.last_block = r
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self.start_block = self.last_block
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o = block_by_number(r)
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r = self.rpc.do(o)
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self.last_timestamp = r['timestamp']
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self.start_timestamp = self.last_timestamp
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nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.rpc)
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o = c.decimals(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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self.decimals = c.parse_decimals(r)
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self.period_seconds = settings.period_minutes * 60
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self.period = 1
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self.period_txs = []
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self.period_tx_limit = self.period_seconds - 1
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self.sink_address = settings.sink_address
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logg.info('intialized at block {} timestamp {} period {} demurrage level {} sink address {} (first address in keystore)'.format(
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self.last_block,
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self.last_timestamp,
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settings.period_minutes,
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settings.demurrage_level,
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settings.sink_address,
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)
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)
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self.eth_helper.disable_auto_mine_transactions()
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self.caller_contract = DemurrageToken(self.chain_spec)
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self.caller_address = self.accounts[0]
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def __check_limit(self):
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if self.period_tx_limit == len(self.period_txs):
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raise TxLimitException('reached period tx limit {}'.format(self.period_tx_limit))
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def __check_tx(self, tx_hash):
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o = receipt(tx_hash)
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rcpt = self.rpc.do(o)
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if rcpt['status'] == 0:
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raise RuntimeError('tx {} (block {} index {}) failed'.format(tx_hash, self.last_block, rcpt['transaction_index']))
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logg.debug('tx {} block {} index {} verified'.format(tx_hash, self.last_block, rcpt['transaction_index']))
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def get_now(self):
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o = block_latest()
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r = self.rpc.do(o)
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o = block_by_number(r, include_tx=False)
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r = self.rpc.do(o)
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return r['timestamp']
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def get_minutes(self):
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t = self.get_now()
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return int((t - self.start_timestamp) / 60)
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def get_start(self):
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return self.start_timestamp
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def get_period(self):
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o = self.caller_contract.actual_period(self.address, sender_address=self.caller_address)
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r = self.rpc.do(o)
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return self.caller_contract.parse_actual_period(r)
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def get_demurrage(self):
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o = self.caller_contract.demurrage_amount(self.address, sender_address=self.caller_address)
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r = self.rpc.do(o)
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logg.info('demrrage amount {}'.format(r))
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return float(self.caller_contract.parse_demurrage_amount(r) / (10 ** 38))
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def get_supply(self):
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o = self.caller_contract.total_supply(self.address, sender_address=self.caller_address)
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r = self.rpc.do(o)
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supply = self.caller_contract.parse_total_supply(r)
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return supply
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def from_units(self, v):
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return v * (10 ** self.decimals)
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def mint(self, recipient, value):
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self.__check_limit()
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nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
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(tx_hash, o) = c.mint_to(self.address, self.accounts[0], recipient, value)
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self.rpc.do(o)
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self.__next_block()
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self.__check_tx(tx_hash)
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self.period_txs.append(tx_hash)
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logg.info('mint {} tokens to {} - {}'.format(value, recipient, tx_hash))
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return tx_hash
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def transfer(self, sender, recipient, value):
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nonce_oracle = RPCNonceOracle(sender, conn=self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
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(tx_hash, o) = c.transfer(self.address, sender, recipient, value)
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self.rpc.do(o)
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self.__next_block()
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self.__check_tx(tx_hash)
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self.period_txs.append(tx_hash)
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logg.info('transfer {} tokens from {} to {} - {}'.format(value, sender, recipient, tx_hash))
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return tx_hash
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def balance(self, holder, base=False):
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o = None
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if base:
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o = self.caller_contract.base_balance_of(self.address, holder, sender_address=self.caller_address)
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else:
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o = self.caller_contract.balance_of(self.address, holder, sender_address=self.caller_address)
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r = self.rpc.do(o)
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return self.caller_contract.parse_balance(r)
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def __next_block(self):
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hsh = self.eth_helper.mine_block()
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o = block_by_hash(hsh)
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r = self.rpc.do(o)
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for tx_hash in r['transactions']:
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o = receipt(tx_hash)
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rcpt = self.rpc.do(o)
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if rcpt['status'] == 0:
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raise RuntimeError('tx {} (block {} index {}) failed'.format(tx_hash, self.last_block, rcpt['transaction_index']))
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logg.debug('tx {} (block {} index {}) verified'.format(tx_hash, self.last_block, rcpt['transaction_index']))
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logg.debug('now at block {} timestamp {}'.format(r['number'], r['timestamp']))
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def next(self):
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target_timestamp = self.start_timestamp + (self.period * self.period_seconds)
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logg.info('warping to {}, {} from start {}'.format(target_timestamp, target_timestamp - self.start_timestamp, self.start_timestamp))
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self.last_timestamp = target_timestamp
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o = block_latest()
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r = self.rpc.do(o)
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self.last_block = r
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o = block_by_number(r)
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r = self.rpc.do(o)
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cursor_timestamp = r['timestamp'] + 1
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nonce_oracle = RPCNonceOracle(self.accounts[2], conn=self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
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i = 0
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while cursor_timestamp < target_timestamp:
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logg.info('mining block on {}'.format(cursor_timestamp))
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(tx_hash, o) = c.apply_demurrage(self.address, self.accounts[2])
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self.rpc.do(o)
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self.eth_helper.time_travel(cursor_timestamp + 60)
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self.__next_block()
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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if r['status'] == 0:
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raise RuntimeError('demurrage fast-forward failed on step {} timestamp {} block timestamp {} target {}'.format(i, cursor_timestamp, target_timestamp))
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cursor_timestamp += 60*60 # 1 hour
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o = block_by_number(r['block_number'])
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b = self.rpc.do(o)
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logg.info('block mined on timestamp {} (delta {}) block number {}'.format(b['timestamp'], b['timestamp'] - self.start_timestamp, b['number']))
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i += 1
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(tx_hash, o) = c.apply_demurrage(self.address, self.accounts[2])
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self.rpc.do(o)
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nonce_oracle = RPCNonceOracle(self.accounts[3], conn=self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
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(tx_hash, o) = c.change_period(self.address, self.accounts[3])
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self.rpc.do(o)
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self.eth_helper.time_travel(target_timestamp + 1)
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self.__next_block()
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o = block_latest()
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r = self.rpc.do(o)
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o = block_by_number(self.last_block)
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r = self.rpc.do(o)
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self.last_block = r['number']
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block_base = self.last_block
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logg.info('block before demurrage execution {} {}'.format(r['timestamp'], r['number']))
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if self.redistribute:
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for actor in self.actors:
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nonce_oracle = RPCNonceOracle(actor, conn=self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
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(tx_hash, o) = c.apply_redistribution_on_account(self.address, actor, actor)
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self.rpc.do(o)
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nonce_oracle = RPCNonceOracle(self.sink_address, conn=self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
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(tx_hash, o) = c.apply_redistribution_on_account(self.address, self.sink_address, self.sink_address)
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self.rpc.do(o)
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self.__next_block()
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o = block_latest()
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self.last_block = self.rpc.do(o)
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o = block_by_number(self.last_block)
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r = self.rpc.do(o)
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for tx_hash in r['transactions']:
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o = receipt(tx_hash)
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rcpt = self.rpc.do(o)
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if rcpt['status'] == 0:
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raise RuntimeError('demurrage step failed on block {}'.format(self.last_block))
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self.last_timestamp = r['timestamp']
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logg.debug('next concludes at block {} timestamp {}, {} after start'.format(self.last_block, self.last_timestamp, self.last_timestamp - self.start_timestamp))
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self.period += 1
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self.period_txs = []
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return (self.last_block, self.last_timestamp)
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