Transaction:

bc11a23f393eafe3b02b2f6e757a4f19ca91ccf85ab0a49df5fd1b8cdc2f3a8b
Status
Success
Timestamp
10/15/2021, 4:12:25 PM
Result
None
Block Number
42692
SubBlock Number
0
Nonce
370
Processor
89f67bb871351a1629d66676e4bd92bbacb23bd0649b890542ef98f1b664a497
Stamps Used
325 ( 25.0 dTAU )
Contract Name
submission
Function Name
submit_contract
Signature
97a40ca8cfabf38a47b2ad779253ae59604a002956f12926f617327a6af1aa684c95ea1104526c30c8642d10683e5920189309557dcaa7f389934c162e30050d

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 BSC 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 BSC 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_bsc_v1

State Changes

Contract
con_lamden_link_bsc_v1
Variable
metadata
Key
operator
New Value
f16c130ceb7ed9bcebde301488cfd507717d5d511674bc269c39ad41fc15d780
Contract
con_lamden_link_bsc_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_bsc_v1', name= 'supported_tokens') __nonces = Hash(default_value=0, contract='con_lamden_link_bsc_v1', name= 'nonces') __proofs = Hash(contract='con_lamden_link_bsc_v1', name='proofs') __metadata = Hash(contract='con_lamden_link_bsc_v1', name='metadata') def ____(): __metadata['operator'] = ctx.caller @__export('con_lamden_link_bsc_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_bsc_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 BSC 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_bsc_v1') def burn(ethereum_contract: str, ethereum_address: str, amount: float): assert __supported_tokens[ethereum_contract ] is not None, 'Invalid BSC 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_bsc_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_bsc_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_bsc_v1
Variable
__compiled__
New Value
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Contract
con_lamden_link_bsc_v1
Variable
__owner__
New Value
NULL
Contract
con_lamden_link_bsc_v1
Variable
__submitted__
New Value
{"__time__":[2021,10,15,16,12,27,0]}
Contract
con_lamden_link_bsc_v1
Variable
__developer__
New Value
f16c130ceb7ed9bcebde301488cfd507717d5d511674bc269c39ad41fc15d780
Contract
currency
Variable
balances
New Value
20,736,667