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git://holbrook.no/eth-address-index
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80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
# Author: Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
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# SPDX-License-Identifier: GPL-3.0-or-later
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# File-version: 1
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# Description: Python interface to abi and bin files for faucet contracts
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# standard imports
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import logging
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import json
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import os
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import hashlib
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logg = logging.getLogger(__name__)
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moddir = os.path.dirname(__file__)
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datadir = os.path.join(moddir, 'data')
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class TokenEndorser:
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__abi = None
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__bytecode = None
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__address = None
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def __init__(self, w3, address, signer_address=None):
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abi = TokenEndorser.abi()
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TokenEndorser.bytecode()
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self.__address = address
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self.contract = w3.eth.contract(abi=abi, address=address)
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self.w3 = w3
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if signer_address != None:
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self.signer_address = signer_address
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else:
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if type(self.w3.eth.defaultAccount).__name__ == 'Empty':
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self.w3.eth.defaultAccount = self.w3.eth.accounts[0]
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self.signer_address = self.w3.eth.defaultAccount
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@staticmethod
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def abi():
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if TokenEndorser.__abi == None:
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f = open(os.path.join(datadir, 'TokenEndorser.json'), 'r')
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TokenEndorser.__abi = json.load(f)
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f.close()
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return TokenEndorser.__abi
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@staticmethod
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def bytecode():
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if TokenEndorser.__bytecode == None:
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f = open(os.path.join(datadir, 'TokenEndorser.bin'))
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TokenEndorser.__bytecode = f.read()
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f.close()
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return TokenEndorser.__bytecode
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def token_from_symbol(self, symbol):
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return self.contract.functions.tokenSymbolIndex(symbol).call()
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def endorsed_tokens(self, endorser_address):
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tokens = []
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for i in range(self.contract.functions.endorserTokenCount(endorser_address).call()):
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tidx = self.contract.functions.endorser(endorser_address, i).call()
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t = self.contract.functions.tokens(tidx).call()
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tokens.append(t)
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return tokens
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def add(self, token_address, data):
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self.contract.functions.add(token_address, data).transact({'from': self.signer_address})
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def to_endorsement_key(token_address_hex, endorser_address_hex):
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h = hashlib.new('sha256')
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h.update(bytes.fromhex(token_address_hex[2:]))
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h.update(bytes.fromhex(endorser_address_hex[2:]))
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return h.digest()
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