def checkHash():
Notify(["111_checkHash"])
# to prevent hack from other contract
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
Notify([callerHash, entryHash, ContractAddress])
return True
def invokeB(param):
Notify(["111_invokeB", param])
# to prevent hack from other contract
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
Notify([callerHash, entryHash, ContractAddress])
return True
def Main(operation, args):
trigger = GetTrigger()
if trigger == Verification():
if CheckWitness(OWNER):
return True
return False
elif trigger == Application():
if operation == 'currentKing':
return Get(ctx, KOTH_KEY)
if operation == 'currentBounty':
myhash = GetExecutingScriptHash()
currentBalance = TUT_Contract('balanceOf', [myhash])
current_bounty = currentBalance + INCREMENT
return current_bounty
chash = GetCallingScriptHash()
if chash != TUT_Scripthash:
print('Token type not accepted by this contract')
return False
elif operation == 'onTokenTransfer':
print('onTokenTransfer() called')
return handle_token_received(ctx, args)
return False
def avoidToBeInvokedByContract():
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
if callerHash != entryHash:
Notify(["You are not allowed to invoke this method through contract"])
return False
else:
Notify(["You can implement what you need to do here!"])
return True
def Main(operation, args):
"""
This is the main entry point for the Smart Contract
:param operation: the operation to be performed ( eg `balanceOf`, `transfer`, etc)
:type operation: str
:param args: a list of arguments ( which may be empty, but not absent )
:type args: list
:return: indicating the successful execution of the smart contract
:rtype: bool
"""
# The trigger determines whether this smart contract is being
# run in 'verification' mode or 'application'
trigger = GetTrigger()
# 'Verification' mode is used when trying to spend assets ( eg NEO, Gas)
# on behalf of this contract's address
if trigger == Verification():
# if the script that sent this is the owner
# we allow the spend
assert CheckWitness(OWNER), 'unauthorized'
return True
# 'Application' mode is the main body of the smart contract
elif trigger == Application():
if operation == 'name':
return TOKEN_NAME
elif operation == 'decimals':
return TOKEN_DECIMALS
elif operation == 'symbol':
return TOKEN_SYMBOL
elif operation == 'totalSupply':
return TOKEN_TOTAL_SUPPLY
elif operation == 'balanceOf':
assert len(args) == 1, 'incorrect arg length'
account = args[0]
return do_balance_of(ctx, account)
elif operation == 'transfer':
assert len(args) == 3, 'incorrect arg length'
t_from = args[0]
t_to = args[1]
t_amount = args[2]
return do_transfer(ctx, t_from, t_to, t_amount,
GetCallingScriptHash())
AssertionError('unknown operation')
def Main(operation, args):
trigger = GetTrigger()
if trigger == Verification():
if CheckWitness(OWNER):
return True
return False
elif trigger == Application():
if operation == 'hello':
print('hello world!')
totalcalls = Get('totalCalls')
totalcalls = totalcalls + 1
print(totalcalls)
if Put('totalCalls', totalcalls):
return True
print('staked storage call failed')
return False
return True
if operation == 'ownerWithdraw':
if not CheckWitness(OWNER):
print(
'only the contract owner can withdraw MCT from the contract'
)
return False
if len(args) != 1:
print('withdraw amount not specified')
return False
t_amount = args[0]
myhash = GetExecutingScriptHash()
return MCTContract('transfer', [myhash, OWNER, t_amount])
# end of normal invocations, reject any non-MCT invocations
caller = GetCallingScriptHash()
if caller != MCT_SCRIPTHASH:
print('token type not accepted by this contract')
return False
if operation == 'onTokenTransfer':
print('onTokenTransfer() called')
return handle_token_received(caller, args)
return False
def avoidContractCallAttack(guessNumber):
randomNumber = getRandomNumber()
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
Notify(["randomNumber:", randomNumber, "guessNumber:", guessNumber])
if callerHash != entryHash:
Notify(["You are not allowed to invoke this method through contract!"])
return False
else:
Notify(["You can implement what you need to do here!"])
if guessNumber == randomNumber:
Notify(["You have won the big prize!"])
return True
def Main(op, args):
context = GetContext()
if op == 'registerProvider':
if len(args) == 2:
return register_provider(context, args)
else:
Notify(ARG_ERROR)
return False
elif op == 'delegateVerify':
if len(args) == 1:
wallet = GetCallingScriptHash()
return delegate_verify(context, wallet, args)
else:
Notify(ARG_ERROR)
return False
else:
Notify(INVALID_OPERATION)
return False
def bet(account, ongAmount, number):
"""
:param account:
:param ongAmount:
:param number:
:return:
"""
# RequireWitness(account)
if CheckWitness(account) == False:
# bet: Check witness failed!
Notify(["Error", 601])
return False
currentRound = getCurrentRound()
# to prevent hack from other contract
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
# Require(callerHash == entryHash)
if callerHash != entryHash:
# bet: Don't support bet method being invoked by another contract to prevent hacking
Notify(["Error", 602])
return False
if getRoundGameStatus(currentRound) != STATUS_ON:
# bet: Current round game ended, please wait for the starting of the next round game and try later
Notify(["Error", 603])
return False
# make sure the contract has enough ong to pay to accont if account wins
tryPayOutToWin = _calculatePayOutToWin(ongAmount, number)
totalOngAmount = getTotalONG()
realTimeRunVault = getRealTimeRunningVault(currentRound)
# # Require(realTimeRunVault > tryPayOutToWin)
if realTimeRunVault < Sub(tryPayOutToWin, ongAmount):
# bet: Running pot/vault does not have enough asset to pay to the player, please try smaller bet
Notify(["Error", 604])
return False
# Require(_transferONG(account, ContractAddress, ongAmount))
res = _transferONG(account, ContractAddress, ongAmount)
if res == False:
# bet: Transfer ONG failed, please try later or again
Notify(["Error", 605])
return False
# Require(number < 97)
if number >= 97:
# bet: Please try to bet with a number less than 97
Notify(["Error", 606])
return False
# Require(number > 1)
if number <= 1:
# bet: Please try to bet with a number greater than 1
Notify(["Error", 607])
return False
theNumber = _rollANumber()
payOutToWin = 0
if theNumber < number:
payOutToWin = tryPayOutToWin
Require(_transferONGFromContact(account, payOutToWin))
# update total ongAmount
ongAmountToBeSub = Sub(payOutToWin, ongAmount)
Put(GetContext(), TOTAL_ONG_KEY, Sub(totalOngAmount, ongAmountToBeSub))
# update real time running vault
realTimeRunVaultKey = concatKey(concatKey(ROUND_PREFIX, currentRound),
REAL_TIME_RUNNING_VAULT)
Put(GetContext(), realTimeRunVaultKey,
Sub(realTimeRunVault, ongAmountToBeSub))
realTimeRunVault = getRealTimeRunningVault(currentRound)
# mark the game as end if real time running vault is less than 1/10 of running vault
if realTimeRunVault <= Div(getIncreasingRunnVault(currentRound), 10):
# mark this round of game end
Put(GetContext(),
concatKey(concatKey(ROUND_PREFIX, currentRound), ROUND_STATUS),
STATUS_OFF)
# update profit per investment for bankers
runVaultLeft = getRunningVault(currentRound)
if runVaultLeft > 0:
profitPerRuningVaultShareToBeAdd = Div(
Mul(realTimeRunVault, MagnitudeForProfitPerSth),
runVaultLeft)
Put(
GetContext(),
concatKey(concatKey(ROUND_PREFIX, currentRound),
PROFIT_PER_RUNNING_VAULT_SHARE_KEY),
Add(profitPerRuningVaultShareToBeAdd,
getProfitPerRunningVaultShare(currentRound)))
# update real time running vault
Delete(GetContext(), realTimeRunVaultKey)
Notify(["endCurrentRound", currentRound])
return True
else:
# update total ong amount
Put(GetContext(), TOTAL_ONG_KEY, Add(totalOngAmount, ongAmount))
# update profit per investment for bankers
runVaultLeft = getRunningVault(currentRound)
if runVaultLeft > 0:
profitPerRunNingVaultShareToBeAdd = Div(
Mul(ongAmount, MagnitudeForProfitPerSth), runVaultLeft)
Put(
GetContext(),
concatKey(concatKey(ROUND_PREFIX, currentRound),
PROFIT_PER_RUNNING_VAULT_SHARE_KEY),
Add(profitPerRunNingVaultShareToBeAdd,
getProfitPerRunningVaultShare(currentRound)))
Notify([
"bet", currentRound, account, number, theNumber, ongAmount, payOutToWin
])
return True
def Main(operation, args):
"""Entry point to the program
:param str operation: The name of the operation to perform
:param list args: A list of arguments along with the operation
:return: The result of the operation
:rtype: bytearray
Token operations:
- name(): returns name of token
- symbol(): returns token symbol
- claims(): returns a holders claim
TOKEN_CONTRACT_OWNER operations:
- mintToken(owner, claims): create a new NFT token with the specified properties
and URI and send it to the specified owner
"""
# The trigger determines whether this smart contract is being run
# in 'verification' mode or 'application'
trigger = GetTrigger()
# 'Verification' mode is used when trying to spend assets
# (eg NEO, Gas) on behalf of this contract's address
if trigger == Verification():
# if the script that sent this is the owner, we allow the spend
if CheckWitness(TOKEN_CONTRACT_OWNER):
return True
elif trigger == Application():
ctx = GetContext()
if operation == 'name':
return TOKEN_NAME
elif operation == 'symbol':
return TOKEN_SYMBOL
elif operation == 'claims':
t_owner = GetCallingScriptHash()
token = Get(ctx, t_owner)
if len(token) == b'\x00':
token = b'\x01' # token id's cannot go below 1
claims = Get(ctx, concat('claims/', token))
if claims:
return claims
Notify(TOKEN_DNE_ERROR)
return False
# Administrative operations
if operation == 'mintToken':
if CheckWitness(TOKEN_CONTRACT_OWNER):
if len(args) == 2:
return do_mint_token(ctx, args)
Notify(ARG_ERROR)
return False
else:
Notify(PERMISSION_ERROR)
return False
Notify('unknown operation')
return False
def Main(operation, args):
trigger = GetTrigger()
if trigger == Verification():
# This should never be necessary but just in case someone
# accidentally sends non-MCT assets to the contract they
# can be recovered instead of being burned forever
if CheckWitness(PARTY1):
return True
return False
elif trigger == Application():
# setNewPayee(newPayee) - if the current payee wants to assign
# the tokens to another party, the contract payee can be changed
# but only if both the depositor and current payee agree
if operation == 'setNewPayee':
if len(args) != 1:
print('New payee scripthash not specified')
return False
new_payee = args[0]
if len(new_payee) != 20:
print('Incorrect new payee scripthash length')
return False
current_payee = Get('payee')
if len(current_payee) != 20:
current_payee = PARTY2
if CheckWitness(PARTY1): # depositor approval
party2_payee = Get('Party2_Payee_Change_Approval')
if new_payee == party2_payee:
Put('payee', new_payee)
Delete('Party1_Payee_Change_Approval')
Delete('Party2_Payee_Change_Approval')
else:
Put('Party1_Payee_Change_Approval', new_payee)
return True
if CheckWitness(current_payee): # current payee approval
party1_payee = Get('Party1_Payee_Change_Approval')
if new_payee == party1_payee:
Put('payee', new_payee)
Delete('Party1_Payee_Change_Approval')
Delete('Party2_Payee_Change_Approval')
else:
Put('Party1_Payee_Change_Approval', new_payee)
return True
print('Not authorized to approve payee change')
return False
# getCurrentPayee() - return currently set payee value
if operation == 'getCurrentPayee':
current_payee = Get('payee')
if len(current_payee) != 20:
current_payee = PARTY2
return current_payee
# getUnlockTime() - return hard-coded unlock timestamp
if operation == 'getUnlockTime':
return unlockTime
# withdraw() - if this operation is called after the unlock
# period, the entire contract balance will be automatically
# transferred to the current payee
if operation == 'withdraw':
header = GetHeader(GetHeight())
if header.Timestamp < unlockTime:
print('unlock period has not yet expired')
return False
# This contract's script hash, owner of the locked MCT tokens
myhash = GetExecutingScriptHash()
# Payout to current payee address
payee = Get('payee')
if len(payee) != 20:
payee = PARTY2
t_amount = MCTContract('balanceOf', [myhash])
if t_amount > 0:
print('Transferring all funds in contract to payee')
return MCTContract('transfer', [myhash, payee, t_amount])
else:
print('No funds in contract')
return False
# end of normal invocations, reject any non-MCT invocations
caller = GetCallingScriptHash()
if caller != MCT_SCRIPTHASH:
print('token type not accepted by this contract')
return False
if operation == 'onTokenTransfer':
if CheckWitness(PARTY1):
return True # this is how party 1 deposits stake+locked tokens
print('onTokenTransfer() called from address other than party 1')
return False
def invokeA(operation, params):
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
Notify(["111_invokeA",callerHash, entryHash, ContractAddress])
return ContractB(operation, params)
def Main(operation, args):
trigger = GetTrigger()
if trigger == Verification():
return False # no withdrawals allowed, even by contract owner
elif trigger == Application():
arglen = len(args)
if operation == 'onTokenTransfer':
return handle_token_received(GetCallingScriptHash(), args)
if operation == 'confirmShipment': # seller-only
assert arglen == 1, 'incorrect argument length'
sale_id = args[0]
sale = loadSale(sale_id)
assert sale['state'] == 'awaiting shipment', 'sale state incorrect'
assert CheckWitness(sale['seller']), 'must be seller to confirm shipment'
sale['state'] = 'shipment confirmed'
r = Put(concat('sales/', sale_id), Serialize(sale))
return True
elif operation == 'confirmReceived': # buyer-only
assert arglen == 1, 'incorrect argument length'
sale_id = args[0]
sale = loadSale(sale_id)
assert sale['state'] == 'shipment confirmed', 'sale state incorrect'
seller = sale['seller']
buyer = sale['buyer']
price = sale['price']
myhash = GetExecutingScriptHash()
assert CheckWitness(buyer), 'must be buyer to complete the sale'
# return the buyer deposit minus the item price
r = MCTContract('transfer', [myhash, buyer, price])
# return the seller deposit plus the item price
r = MCTContract('transfer', [myhash, seller, price * 3])
# delete the sale
r = Delete(concat('sales/', sale_id))
return True
elif operation == 'deleteSale': # seller-only, if buyer has not already made deposit
assert arglen == 1, 'incorrect argument length'
sale_id = args[0]
sale = loadSale(sale_id)
assert sale['state'] == 'new', 'cannot cancel sale post-buyer-deposit'
seller = sale['seller']
price = sale['price']
myhash = GetExecutingScriptHash()
assert CheckWitness(seller), 'must be seller to cancel the sale'
# return the seller deposit to them
return MCTContract('transfer', [myhash, seller, price * 2])
# delete the sale
r = Delete(concat('sales/', sale_id))
return True
elif operation == 'sale': # get sale details
assert arglen == 1, 'incorrect argument length'
sale_id = args[0]
return Get(concat('sales/', sale_id))
AssertionError('unknown operation - code: XxXxXxXx')
def Main(operation, args):
caller = GetCallingScriptHash()
print('caller_main')
print(caller)
printTest()
def fillPaper(account, guessNumberList):
"""
:param account:
:param guessNumberList: can be a list of numbers
:return:
"""
RequireWitness(account)
currentRound = getCurrentRound()
Require(getGameStatus(currentRound) == STATUS_ON)
# to prevent hack from other contract
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
Require(callerHash == entryHash)
# Require(entryHash == ContractAddress)
guessNumberLen = len(guessNumberList)
Require(guessNumberLen >= 1)
currentPaperBalance = getPaperBalance(account)
# make sure his balance is greater or equal to guessNumberList length
Require(currentPaperBalance >= guessNumberLen)
numberListKey = concatKey(concatKey(ROUND_PREFIX, currentRound), FILLED_NUMBER_LIST_KEY)
numberListInfo = Get(GetContext(), numberListKey)
numberList = []
if numberListInfo:
numberList = Deserialize(numberListInfo)
for guessNumber in guessNumberList:
# Require is need to raise exception
Require(guessNumber < 100)
Require(guessNumber >= 0)
numberPlayersListKey = concatKey(concatKey(ROUND_PREFIX, currentRound), concatKey(FILLED_NUMBER_KEY, guessNumber))
numberPlayersListInfo = Get(GetContext(), numberPlayersListKey)
numberPlayersList = []
if numberPlayersListInfo:
numberPlayersList = Deserialize(numberPlayersListInfo)
# make sure account has NOT filled the number before in this round
for player in numberPlayersList:
Require(player != account)
else:
numberList.append(guessNumber)
# add account to the players list that filled the number in this round
numberPlayersList.append(account)
# Store the numberPlayers List
numberPlayersListInfo = Serialize(numberPlayersList)
Put(GetContext(), numberPlayersListKey, numberPlayersListInfo)
# Store the numberList
numberListInfo = Serialize(numberList)
Put(GetContext(), numberListKey, numberListInfo)
# update dividend
updateDividendBalance(account)
# update the paper balance of account -- destroy the filled papers
Put(GetContext(), concatKey(PAPER_BALANCE_PREFIX, account), Sub(currentPaperBalance, guessNumberLen))
# update total paper amount
Put(GetContext(), TOTAL_PAPER_KEY, Sub(getTotalPaper(), guessNumberLen))
# update the filled paper balance of account in current round
key1 = concatKey(ROUND_PREFIX, currentRound)
key2 = concatKey(FILLED_PAPER_BALANCE_PREFIX, account)
key = concatKey(key1, key2)
Put(GetContext(), key, Add(guessNumberLen, getFilledPaperBalance(account, currentRound)))
# update the filled paper amount in current round
key = concatKey(concatKey(ROUND_PREFIX, currentRound), FILLED_PAPER_AMOUNT)
Put(GetContext(), key, Add(guessNumberLen, getFilledPaperAmount(currentRound)))
Notify(["fillPaper", account, guessNumberList, GetTime()])
return True
def Main(operation, args):
"""Entry point to the program
:param str operation: The name of the operation to perform
:param list args: A list of arguments along with the operation
:return: The result of the operation
:rtype: bytearray
Token operations:
- allowance(token_id): returns approved third-party spender of a
token
- approve(token_receiver, token_id, revoke): approve third party
to spend a token
- balanceOf(owner): returns owner's current total tokens owned
- name(): returns name of token
- decimals(): returns token decimal precision
- ownerOf(token_id): returns the owner of the specified token.
- properties(token_id): returns a token's read-only data
- rwProperties(token_id): returns a token's read/write data
- supportedStandards(): returns a list of supported standards
{"NEP-10"}
- symbol(): returns token symbol
- token(token_id): returns a dictionary where token, property,
and uri keys map to the corresponding data for the given
`token_id`
- tokensOfOwner(owner, starting_index): returns a dictionary that
contains less than or equal to ten of the tokens owned by
the specified address starting at the `starting_index`.
- totalSupply(): Returns the total token supply deployed in the
system.
- transfer(to, token_id, extra_arg): transfers a token
- transferFrom(spender, from, to, token_id): allows a third party
to execute a pre-approved transfer
- uri(token_id): Returns a distinct Uniform Resource Identifier
(URI) for a given asset.
The URI data of a token supplies a reference to get more
information about a specific token or its data.
TOKEN_CONTRACT_OWNER operations:
- mintToken(owner, properties, URI, extra_arg): create a new
NFT token with the specified properties and URI and send it
to the specified owner
- modifyURI(token_id, token_data): modify specified token's
URI data
setters:
- setName(name): sets the name of the token
- setSymbol(symbol): sets the token's symbol
- setSupportedStandards(supported_standards): sets the
supported standards, 'NEP-10' is always the first element
in the array
"""
# The trigger determines whether this smart contract is being run
# in 'verification' mode or 'application'
trigger = GetTrigger()
# 'Verification' mode is used when trying to spend assets
# (eg NEO, Gas) on behalf of this contract's address
if trigger == Verification():
# if the script that sent this is the owner, we allow the spend
if CheckWitness(TOKEN_CONTRACT_OWNER):
return True
elif trigger == Application():
# Need to get this at the top level
caller = GetCallingScriptHash()
ctx = GetContext()
if operation == 'name':
name = Get(ctx, 'name')
if name:
return name
else:
return TOKEN_NAME
elif operation == 'symbol':
symbol = Get(ctx, 'symbol')
if symbol:
return symbol
else:
return TOKEN_SYMBOL
elif operation == 'supportedStandards':
supported_standards = Get(ctx, 'supportedStandards')
if supported_standards:
return supported_standards
else:
return Serialize(['NEP-10'])
elif operation == 'totalSupply':
return Get(ctx, TOKEN_CIRC_KEY)
elif operation == 'allowance':
assert len(args) == 1, ARG_ERROR
ownership = safe_deserialize(
Get(ctx, concat('ownership/', args[0])))
assert ownership, TOKEN_DNE_ERROR
# don't fault here in case a calling contract is just checking allowance value
if not has_key(ownership, 'approved'): return False
if len(ownership['approved']) != 40: return False
return ownership['approved']
elif operation == 'balanceOf':
assert len(args) == 1, ARG_ERROR
assert len(args[0]) == 20, INVALID_ADDRESS_ERROR
token_iter = Find(ctx, args[0])
count = 0
while token_iter.next():
count += 1
return count
elif operation == 'ownerOf':
assert len(args) == 1, ARG_ERROR
ownership = safe_deserialize(
Get(ctx, concat('ownership/', args[0])))
assert ownership, TOKEN_DNE_ERROR
assert has_key(ownership, 'owner'), TOKEN_DNE_ERROR
assert len(ownership['owner']) == 20, TOKEN_DNE_ERROR
return ownership['owner']
elif operation == 'properties':
assert len(args) == 1, ARG_ERROR
return get_properties(ctx, args[0])
elif operation == 'rwProperties':
assert len(args) == 1, ARG_ERROR
return get_rw_properties(ctx, args[0])
elif operation == 'token':
assert len(args) == 1, ARG_ERROR
token = Get(ctx, concat('token/', args[0]))
assert token, TOKEN_DNE_ERROR
return token
elif operation == 'tokensOfOwner':
assert len(args) == 2, ARG_ERROR
tokens_of_owner = do_tokens_of_owner(ctx, args[0], args[1])
assert tokens_of_owner, 'address has no tokens'
return Serialize(tokens_of_owner)
elif operation == 'uri':
assert len(args) == 1, ARG_ERROR
token = safe_deserialize(Get(ctx, concat('token/', args[0])))
assert token, TOKEN_DNE_ERROR
assert has_key(token, 'uri'), TOKEN_DNE_ERROR
return token['uri']
elif operation == 'decimals':
return TOKEN_DECIMALS
#
# User RW operations
#
if operation == 'approve':
# args: from, spender, id, revoke
# (NFT needs a fourth argument to revoke approval)
assert len(args) > 2, ARG_ERROR
assert args[2], TOKEN_DNE_ERROR
return do_approve(ctx, caller, args)
elif operation == 'transfer':
assert len(args) > 1, ARG_ERROR
return do_transfer(ctx, caller, args)
elif operation == 'transferFrom':
assert len(args) > 2, ARG_ERROR
if len(args) == 3:
# Nash-style (from, to, amount/id) transferFrom that can
# be invoked only by whitelisted DEX to initiate a
# pre-approved transfer
return nash_do_transfer_from(ctx, caller, args)
else:
# Moonlight-style (spender, from, to, amount/id)
# transfer where an authenticated spender/originator is
# the only one who can initiate a transfer but can send
# to an arbitrary third party (or themselves)
return do_transfer_from(ctx, caller, args)
#
# dApp operations
#
if operation == 'setRWProperties':
# args: token id, rwdata
assert CheckWitness(DAPP_ADMIN), PERMISSION_ERROR
assert len(args) == 2, ARG_ERROR
return set_rw_properties(ctx, args[0], args[1])
# Administrative operations
if CheckWitness(TOKEN_CONTRACT_OWNER):
if operation == 'mintToken':
assert len(args) > 3, ARG_ERROR
return do_mint_token(ctx, args)
elif operation == 'modifyURI':
assert len(args) == 2, ARG_ERROR
return do_modify_uri(ctx, args)
elif operation == 'setName':
assert len(args) == 1, ARG_ERROR
return do_set_config(ctx, 'name', args[0])
elif operation == 'setSymbol':
assert len(args) == 1, ARG_ERROR
return do_set_config(ctx, 'symbol', args[0])
elif operation == 'setSupportedStandards':
assert len(args) >= 1, ARG_ERROR
supported_standards = ['NEP-10']
for arg in args:
supported_standards.append(arg)
return do_set_config(ctx, 'supportedStandards',
Serialize(supported_standards))
AssertionError('unknown operation')
return False
def FixGamblingResult(tx_hash):
caller_adress = GetCallingScriptHash()
if caller_adress != CHINCIRO_DICE_CONTRACT:
Nofity([FixGamblingResult, "Falsy Execution"])
return True
def printTest():
caller = GetCallingScriptHash()
print('caller_printCaller')
print(caller)
def Main(operation, args):
trigger = GetTrigger()
if trigger == Verification():
if CheckWitness(OWNER):
return True
return False
elif trigger == Application():
if operation == 'setExchangeRate':
if not CheckWitness(OWNER):
return False
if len(args) != 3:
return False
fromtoken = args[0]
totoken = args[1]
rate = args[2]
tokenkey = concat(fromtoken, totoken)
if len(tokenkey) != 40:
return False
return Put(tokenkey, rate)
if operation == 'exchangeRate':
if len(args) != 2:
return False
fromtoken = args[0]
totoken = args[1]
tokenkey = concat(fromtoken, totoken)
if len(tokenkey) != 40:
return False
return Get(tokenkey)
if operation == 'migrateStorage':
if not CheckWitness(OWNER):
return False
if len(args) != 1:
return False
return Migrate(args[0])
if operation == 'ownerWithdraw':
if not CheckWitness(OWNER):
return False
if len(args) != 2:
return False
t_scripthash = args[0]
t_amount = args[1]
myhash = GetExecutingScriptHash()
if t_scripthash == TOKEN1:
return Token1Contract('transfer', [myhash, OWNER, t_amount])
elif t_scripthash == TOKEN2:
return Token2Contract('transfer', [myhash, OWNER, t_amount])
chash = GetCallingScriptHash()
if chash != TOKEN1:
if chash != TOKEN2: # for some reason comparing these with "and"
# returns an extra value on evaluation stack
print('Token type not accepted by this contract')
return False
if operation == 'onTokenTransfer':
print('onTokenTransfer() called')
return handle_token_received(chash, args)
return False
def Main(operation, args):
"""Entry point to the program
:param str operation: The name of the operation to perform
:param list args: A list of arguments along with the operation
:return: The result of the operation
:rtype: bytearray
Token operations:
- name(): returns name of token
- symbol(): returns token symbol
- totalSupply(): Returns the total token supply deployed in the
system.
- decimals(): Return decimalS
- tokens(): Return enumerator with all tokens FEHLT
- transfer(to, token_id, extra_arg): transfers a token
- ownerOf(token_id): returns the owner of the specified token.
- tokenURI(token_id): Returns a distinct Uniform Resource Identifier
(URI) for a given asset.
The URI data of a token supplies a reference to get more
information about a specific token or its data.
- balanceOf(owner): returns owner's current total tokens owned
- tokensOfOwner(owner, starting_index): returns a dictionary that
contains less than or equal to ten of the tokens owned by
the specified address starting at the `starting_index`.
- allowance(token_id): returns approved third-party spender of a
token
- approve(token_receiver, token_id, revoke): approve third party
to spend a token
- properties(token_id): returns a token's read-only data
- supportedStandards(): returns a list of supported standards
{"NEP-10"}
- tokenData(token_id): returns a dictionary where token, property,
and uri keys map to the corresponding data for the given
`token_id`
- tokensDataOfOwner(owner, starting_index): returns a dictionary
that contains less than or equal to five of the tokens (where
token, properties, and uri keys map to their corresponding data
for each token id) owned by the specified address starting at
the `starting_index`.
- transferFrom(from, to, token_id, extra_arg): allows a third party
to execute an approved transfer
TOKEN_CONTRACT_OWNER operations:
- mintToken(owner, properties, URI, extra_arg): create a new
NFT token with the specified properties and URI and send it
to the specified owner
- modifyURI(token_id, token_data): modify specified token's
URI data
setters:
- setName(name): sets the name of the token
- setSymbol(symbol): sets the token's symbol
- setSupportedStandards(supported_standards): sets the
supported standards, 'NEP-10' is always the first element
in the array
"""
# The trigger determines whether this smart contract is being run
# in 'verification' mode or 'application'
trigger = GetTrigger()
# 'Verification' mode is used when trying to spend assets
# (eg NEO, Gas) on behalf of this contract's address
if trigger == Verification():
# if the script that sent this is the owner, we allow the spend
if CheckWitness(TOKEN_CONTRACT_OWNER):
return True
elif trigger == Application():
ctx = GetContext()
if operation == 'name':
name = Get(ctx, 'name')
if name:
return name
else:
return TOKEN_NAME
elif operation == 'symbol':
symbol = Get(ctx, 'symbol')
if symbol:
return symbol
else:
return TOKEN_SYMBOL
elif operation == 'decimals':
return TOKEN_DECIMALS
elif operation == 'totalSupply':
return Get(ctx, TOKEN_CIRC_KEY)
if operation == 'allowance':
if len(args) == 1:
return Get(ctx, concat('approved/', args[0]))
Notify(ARG_ERROR)
return False
elif operation == 'approve':
if len(args) == 3:
# GetCallingScriptHash() can't be done within the
# function because the calling script hash changes
# depending on where the function is called
return do_approve(ctx, GetCallingScriptHash(), args[0],
args[1], args[2])
Notify(ARG_ERROR)
return False
elif operation == 'balanceOf':
if len(args) == 1:
if len(args[0]) == 20:
return Get(ctx, args[0])
Notify(INVALID_ADDRESS_ERROR)
return False
Notify(ARG_ERROR)
return False
elif operation == 'ownerOf':
if len(args) == 1:
t_owner = Get(ctx, args[0])
if len(t_owner) == 20:
return t_owner
Notify(TOKEN_DNE_ERROR)
return False
Notify(ARG_ERROR)
return False
elif operation == 'properties':
if len(args) == 1:
token_properties = Get(ctx, concat('properties/', args[0]))
if token_properties:
return token_properties
Notify(TOKEN_DNE_ERROR)
return False
Notify(ARG_ERROR)
return False
elif operation == 'tokenData':
if len(args) == 1:
# check to make sure the token exists
if len(Get(ctx, args[0])) == 20:
return Serialize(do_token_data(ctx, args[0]))
Notify(TOKEN_DNE_ERROR)
return False
Notify(ARG_ERROR)
return False
elif operation == 'tokensDataOfOwner':
if len(args) == 2:
tokens_data_of_owner = do_tokens_data_of_owner(
ctx, args[0], args[1])
if tokens_data_of_owner:
return Serialize(tokens_data_of_owner)
return False
Notify(ARG_ERROR)
return False
elif operation == 'tokensOfOwner':
if len(args) == 2:
tokens_of_owner = do_tokens_of_owner(ctx, args[0], args[1])
if tokens_of_owner:
return Serialize(tokens_of_owner)
return False
Notify(ARG_ERROR)
return False
elif operation == 'transfer':
if len(args) >= 2:
# GetCallingScriptHash() can't be done within the
# function because the calling script hash changes
# depending on where the function is called
return do_transfer(ctx, GetCallingScriptHash(), args)
Notify(ARG_ERROR)
return False
elif operation == 'transferFrom':
if len(args) >= 3:
return do_transfer_from(ctx, args)
Notify(ARG_ERROR)
return False
elif operation == 'uri':
if len(args) == 1:
token_uri = Get(ctx, concat('uri/', args[0]))
if token_uri:
return token_uri
Notify(TOKEN_DNE_ERROR)
return False
Notify(ARG_ERROR)
return False
# Administrative operations
if CheckWitness(TOKEN_CONTRACT_OWNER):
if operation == 'mintToken':
if len(args) >= 3:
return do_mint_token(ctx, args)
Notify(ARG_ERROR)
return False
elif operation == 'modifyURI':
if len(args) == 2:
return do_modify_uri(ctx, args[0], args[1])
Notify(ARG_ERROR)
return False
elif operation == 'setName':
if len(args) == 1:
return do_set_config(ctx, 'name', args[0])
Notify(ARG_ERROR)
return False
elif operation == 'setSymbol':
if len(args) == 1:
return do_set_config(ctx, 'symbol', args[0])
Notify(ARG_ERROR)
return False
elif operation == 'setSupportedStandards':
if len(args) >= 1:
supported_standards = ['NEP-10']
for arg in args:
supported_standards.append(arg)
return do_set_config(ctx, 'supportedStandards',
Serialize(supported_standards))
Notify(ARG_ERROR)
return False
else:
Notify(PERMISSION_ERROR)
return False
Notify('unknown operation')
return False
def IsFromContract():
callerHash = GetCallingScriptHash()
entryHash = GetEntryScriptHash()
if callerHash != entryHash:
return True
return False
