erc20-demurrage-token

ERC20 token with redistributed continual demurrage
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expiry.py (1046B)

      1 # external imports
      2 from chainlib.eth.tx import (
      3         TxFactory,
      4         TxFormat,
      5         )
      6 from chainlib.eth.contract import (
      7         ABIContractEncoder,
      8         ABIContractType,
      9         abi_decode_single,
     10         )
     11 from chainlib.eth.constant import ZERO_ADDRESS
     12 
     13 
     14 class ExpiryContract(TxFactory):
     15 
     16     def set_expire_period(self, contract_address, sender_address, expire_timestamp, tx_format=TxFormat.JSONRPC):
     17         enc = ABIContractEncoder()
     18         enc.method('setExpirePeriod')
     19         enc.typ(ABIContractType.UINT256)
     20         enc.uint256(expire_timestamp)
     21         data = enc.get()
     22         tx = self.template(sender_address, contract_address, use_nonce=True)
     23         tx = self.set_code(tx, data)
     24         tx = self.finalize(tx, tx_format)
     25         return tx
     26 
     27 
     28     def expires(self, contract_address, sender_address=ZERO_ADDRESS):
     29         return self.call_noarg('expires', contract_address, sender_address=sender_address)
     30 
     31 
     32     @classmethod
     33     def parse_expires(self, v):
     34         return abi_decode_single(ABIContractType.UINT256, v)
     35 
     36