Transaction #76491
| Hash | 8ae802a85594b73a5df08fd49d3b0c65747d6b0bca48593c0ba607edfca8fbf5 |
| Status | Success |
| Timestamp | 1083 days ago - 5/17/2021, 3:13:18 PM UTC+0 |
| Block | 76022 |
| Stamps Used | 321 |
| Burned Fee | 0.04938462 TAU |
| From | af872ff0f3b00f4161418e9429e738cf8a228c686680233929782de94f46bd70 |
| Contract Name | submission |
| Function Name | submit_contract |
Additional Info
| SubBlock Number | 0 |
| Nonce | 0 |
| Processor | 5b09493df6c18d17cc883ebce54fcb1f5afbd507533417fe32c006009a9c3c4a |
| Signature | 193537ffdeb0e283707ae8283dd6db9ddb3804ec1b8dec1f1c60bc96e65e9d9e3791e928437a3ee96912d20afe6b6cad77595ee8a4d1424698eb3fd18d3f4506 |
| Stamps Supplied | 2000 |
| Stamps per TAU | 65 |
Kwargs
| code | I = importlib # Enforceable interface token_interface = [ I.Func('transfer', args=('amount', 'to')), I.Func('mint', args=('amount', 'to')), I.Func('approve', args=('amount', 'to')), I.Func('transfer_from', args=('amount', 'to', 'main_account')) ] supported_tokens = Hash() nonces = Hash(default_value=0) proofs = Hash() # LST002 metadata = Hash() @construct def seed(): # LST002 metadata['operator'] = ctx.caller # LST002 @export def change_metadata(key: str, value: Any): assert ctx.caller == metadata['operator'], 'Only operator can set metadata!' metadata[key] = value def left_pad(s: str): while len(s) < 64: s = f'0{s}' if len(s) > 64: s = s[:64] return s def unpack_uint256(uint: str, decimals: int): i = int(uint, 16) reduced_i = i / (10 ** decimals) return reduced_i def pack_amount(amount: float, decimals: int): i = int(amount * (10 ** decimals)) h = hex(i)[2:] return left_pad(h) def pack_eth_address(address: str): assert address.startswith('0x'), 'Invalid Ethereum prefix' a = address[2:] assert len(a) == 40, 'Invalid address length' int(a, 16) # Throws error if not hex string return left_pad(a) def pack_int(i: int): i = int(i) h = hex(i)[2:] return left_pad(h) @export def mint(ethereum_contract: str, amount: str, lamden_wallet: str): assert ctx.caller == metadata['operator'], 'Only operator can call! Current caller is {}, operator should be {}'.format(ctx.caller, metadata['operator']) assert supported_tokens[ethereum_contract] is not None, 'Invalid Ethereum Token!' decimals = supported_tokens[ethereum_contract, 'decimals'] assert decimals is not None, 'Unexpected decimal error' unpacked_amount = unpack_uint256(amount, decimals) token = I.import_module(supported_tokens[ethereum_contract]) assert I.enforce_interface(token, token_interface), 'Invalid token interface!' token.mint(amount=unpacked_amount, to=lamden_wallet) @export def burn(ethereum_contract: str, ethereum_address: str, amount: float): assert supported_tokens[ethereum_contract] is not None, 'Invalid Ethereum Token!' token = I.import_module(supported_tokens[ethereum_contract]) assert I.enforce_interface(token, token_interface), 'Invalid token interface!' token.transfer_from(amount=amount, to=ctx.this, main_account=ctx.caller) packed_token = pack_eth_address(ethereum_contract) packed_amount = pack_amount(amount, supported_tokens[ethereum_contract, 'decimals']) packed_nonce = pack_int(nonces[ethereum_address] + 1) packed_address = pack_eth_address(ethereum_address) nonces[ethereum_address] += 1 abi = packed_token + packed_amount + packed_nonce + packed_address return abi @export def add_token(ethereum_contract: str, lamden_contract: str, decimals: int): assert supported_tokens[ethereum_contract] is None, 'Token already supported' assert ctx.caller == metadata['operator'], 'Only operator can call!' token = I.import_module(lamden_contract) assert I.enforce_interface(token, token_interface), 'Invalid token interface!' supported_tokens[ethereum_contract] = lamden_contract supported_tokens[ethereum_contract, 'decimals'] = decimals @export def post_proof(hashed_abi: str, signed_abi: str): assert ctx.caller == metadata['operator'], 'Only operator can call!' proofs[hashed_abi] = signed_abi |
| name | con_lamden_link_v1 |
State Changes
| Contract | con_lamden_link_v1 |
| Variable | metadata |
| Key | operator |
| New Value | af872ff0f3b00f4161418e9429e738cf8a228c686680233929782de94f46bd70 |
| Contract | con_lamden_link_v1 |
| Variable | __code__ |
| New Value | I = importlib token_interface = [I.Func('transfer', args=('amount', 'to')), I.Func('mint', args=('amount', 'to')), I.Func('approve', args=('amount', 'to')), I. Func('transfer_from', args=('amount', 'to', 'main_account'))] __supported_tokens = Hash(contract='con_lamden_link_v1', name= 'supported_tokens') __nonces = Hash(default_value=0, contract='con_lamden_link_v1', name='nonces') __proofs = Hash(contract='con_lamden_link_v1', name='proofs') __metadata = Hash(contract='con_lamden_link_v1', name='metadata') def ____(): __metadata['operator'] = ctx.caller @__export('con_lamden_link_v1') def change_metadata(key: str, value: Any): assert ctx.caller == __metadata['operator' ], 'Only operator can set metadata!' __metadata[key] = value def __left_pad(s: str): while len(s) < 64: s = f'0{s}' if len(s) > 64: s = s[:64] return s def __unpack_uint256(uint: str, decimals: int): i = int(uint, 16) reduced_i = i / 10 ** decimals return reduced_i def __pack_amount(amount: float, decimals: int): i = int(amount * 10 ** decimals) h = hex(i)[2:] return __left_pad(h) def __pack_eth_address(address: str): assert address.startswith('0x'), 'Invalid Ethereum prefix' a = address[2:] assert len(a) == 40, 'Invalid address length' int(a, 16) return __left_pad(a) def __pack_int(i: int): i = int(i) h = hex(i)[2:] return __left_pad(h) @__export('con_lamden_link_v1') def mint(ethereum_contract: str, amount: str, lamden_wallet: str): assert ctx.caller == __metadata['operator' ], 'Only operator can call! Current caller is {}, operator should be {}'.format( ctx.caller, __metadata['operator']) assert __supported_tokens[ethereum_contract ] is not None, 'Invalid Ethereum Token!' decimals = __supported_tokens[ethereum_contract, 'decimals'] assert decimals is not None, 'Unexpected decimal error' unpacked_amount = __unpack_uint256(amount, decimals) token = I.import_module(__supported_tokens[ethereum_contract]) assert I.enforce_interface(token, token_interface ), 'Invalid token interface!' token.mint(amount=unpacked_amount, to=lamden_wallet) @__export('con_lamden_link_v1') def burn(ethereum_contract: str, ethereum_address: str, amount: float): assert __supported_tokens[ethereum_contract ] is not None, 'Invalid Ethereum Token!' token = I.import_module(__supported_tokens[ethereum_contract]) assert I.enforce_interface(token, token_interface ), 'Invalid token interface!' token.transfer_from(amount=amount, to=ctx.this, main_account=ctx.caller) packed_token = __pack_eth_address(ethereum_contract) packed_amount = __pack_amount(amount, __supported_tokens[ ethereum_contract, 'decimals']) packed_nonce = __pack_int(__nonces[ethereum_address] + 1) packed_address = __pack_eth_address(ethereum_address) __nonces[ethereum_address] += 1 abi = packed_token + packed_amount + packed_nonce + packed_address return abi @__export('con_lamden_link_v1') def add_token(ethereum_contract: str, lamden_contract: str, decimals: int): assert __supported_tokens[ethereum_contract ] is None, 'Token already supported' assert ctx.caller == __metadata['operator'], 'Only operator can call!' token = I.import_module(lamden_contract) assert I.enforce_interface(token, token_interface ), 'Invalid token interface!' __supported_tokens[ethereum_contract] = lamden_contract __supported_tokens[ethereum_contract, 'decimals'] = decimals @__export('con_lamden_link_v1') def post_proof(hashed_abi: str, signed_abi: str): assert ctx.caller == __metadata['operator'], 'Only operator can call!' __proofs[hashed_abi] = signed_abi |
| Contract | con_lamden_link_v1 |
| Variable | __compiled__ |
| New Value | 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|
| Contract | con_lamden_link_v1 |
| Variable | __owner__ |
| New Value | null |
| Contract | con_lamden_link_v1 |
| Variable | __submitted__ |
| New Value | 2021,5,17,15,13,19,0 |
| Contract | con_lamden_link_v1 |
| Variable | __developer__ |
| New Value | af872ff0f3b00f4161418e9429e738cf8a228c686680233929782de94f46bd70 |
| Contract | currency |
| Variable | balances |
| Key | af872ff0f3b00f4161418e9429e738cf8a228c686680233929782de94f46bd70 |
| New Value | 145.061538461538461 |