Skip to content

Currency price oracle updates #4

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
anonymoussprocket wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Currency price oracle updates #4

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
176 changes: 143 additions & 33 deletions oro-contract/currency-oro.py
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,40 +1,150 @@
# An illustrative example of a "trusted" oracle contract.
# Author: Mike Radin, github.com/anonymoussprocket
# Licensed under the Apache License, Version 2.0.

import smartpy as sp

class CurrencyConverter(sp.Contract):
def __init__(self,admin):
self.init(apidata = sp.map(tkey = sp.TString, tvalue = sp.TInt), keysset=sp.set([admin]))
class ExchangeRateConsumer(sp.Contract):
def __init__(self, oracle):
self.init(
oracle = oracle,
currencyPair = sp.string(""),
value = sp.nat(0),
precision = sp.nat(0),
timestamp = sp.timestamp(0),
source = sp.string(""))

@sp.entry_point
def sendQuery(self, params):
rtype = sp.TRecord(
currencyPair = sp.TString,
value = sp.TNat,
precision = sp.TNat,
timestamp = sp.TTimestamp,
source = sp.TString)
ptype = sp.TRecord(
currencyPair = sp.TString,
callback = sp.TContract(rtype)
)

getHandle = sp.contract(ptype, self.data.oracle, entry_point = "processDataRequest").open_some()

args = sp.record(
currencyPair = params.currencyPair,
callback = sp.contract(rtype,
sp.to_address(sp.self),
entry_point = "receiveData").open_some()
)
sp.transfer(args, sp.tez(1000), getHandle)

@sp.entry_point
def receiveData(self, params):
self.data.currencyPair = params.currencyPair
self.data.value = params.value
self.data.precision = params.precision
self.data.timestamp = params.timestamp
self.data.source = params.source

class ExchangeRateOracle(sp.Contract):
def __init__(self, admin):
self.init(
feed = sp.map(
tkey = sp.TString,
tvalue =
sp.TRecord(
value = sp.TNat,
precision = sp.TNat,
timestamp = sp.TTimestamp,
source = sp.TString
)),
feedQueryCost = sp.map(tkey = sp.TString, tvalue = sp.TMutez),
admin = admin,
operators = sp.set(),
registeredPairs = sp.set()
)

@sp.entry_point
def processDataRequest(self, params):
sp.verify(self.data.registeredPairs.contains(params.currencyPair), message = "Unregistered currency pair")
sp.verify(sp.amount > self.data.feedQueryCost[params.currencyPair], message = "Incorrect query fee")
sp.verify(self.data.feed.contains(params.currencyPair), message = "Data not available")

record = self.data.feed[params.currencyPair]

sp.transfer(
sp.record(
currencyPair = params.currencyPair,
value = record.value,
precision = record.precision,
timestamp = record.timestamp,
source = record.source
),
sp.tez(0),
params.callback)

@sp.entry_point
def updateFeed(self, params):
sp.verify(self.data.operators.contains(sp.sender), message = "Privileged operation")
self.data.feed[params.currencyPair] = sp.record(
value = params.value,
precision = params.precision,
timestamp = params.timestamp,
source = params.source)

@sp.entry_point
def registerFeed(self, params):
sp.verify(sp.sender == self.data.admin, message = "Privileged operation")
sp.verify(~ self.data.feed.contains(params.currencyPair), message = "Currency pair already registered")
self.data.registeredPairs.add(params.currencyPair)
self.data.feedQueryCost[params.currencyPair] = params.cost

@sp.entry_point
def updateOperatorList(self, params):
sp.verify(sp.sender == self.data.admin, message = "Privileged operation")
self.data.operators = params.operators

@sp.entry_point
def updateAdmin(self, params):
sp.verify(sp.sender == self.data.admin, message = "Privileged operation")
pass

@sp.entry_point
def getRequestFromClient(self,params):
sp.if self.data.apidata.contains(params.convkey):
sp.if sp.amount==sp.mutez(2000):
value = self.data.apidata[params.convkey]
comments = "Success"
c = sp.contract(sp.TRecord(value = sp.TInt, comments = sp.TString),sp.sender,entry_point="receiveDataFromOrO").open_some()
mydata = sp.record(value = value,comments = comments)
sp.transfer(mydata,sp.mutez(0),c)
sp.else:
value = 0
comments = "Invalid amount"
c = sp.contract(sp.TRecord(value = sp.TInt, comments = sp.TString),sp.sender,entry_point="receiveDataFromOrO").open_some()
mydata = sp.record(value = value,comments = comments)
sp.transfer(mydata,sp.mutez(0),c)
sp.else:
value = 0
comments = "Bad request"
c = sp.contract(sp.TRecord(value = sp.TInt, comments = sp.TString),sp.sender,entry_point="receiveDataFromOrO").open_some()
mydata = sp.record(value = value,comments = comments)
sp.transfer(mydata,sp.mutez(0),c)

@sp.entry_point
def feedData(self,params):
sp.if self.data.keysset.contains(sp.sender):
self.data.apidata[params.key]=params.value
def setDelegate(self, params):
sp.verify(sp.sender == self.data.admin, message = "Privileged operation")
pass

@sp.add_test(name="testCurrencyOrO")
@sp.entry_point
def transferBalance(self, params):
sp.verify(sp.sender == self.data.admin, message = "Privileged operation")
pass

@sp.add_test(name="ExchangeRateOracle Tests")
def test():
oracle = CurrencyConverter(sp.address("tz1XrHHchSehNudgAq1aQaoB4Bw7N4hZ1nkH"))
scenario = sp.test_scenario()
scenario += oracle
scenario += oracle.feedData(key = "USD_INR",value=76534).run(sender=sp.address("tz1XrHHchSehNudgAq1aQaoB4Bw7N4hZ1nkH"))
scenario += oracle.getRequestFromClient(convkey="USD_INR").run(sender=sp.address("KT1987"))
scenario.h1("ExchangeRateOracle Tests")

admin = sp.test_account("Admin")
scenario.show(admin)

operatorA = sp.test_account("operatorA")
scenario.show(operatorA)

operatorB = sp.test_account("operatorB")
scenario.show(operatorB)

caller = sp.test_account("caller")
scenario.show(caller)

oracle = ExchangeRateOracle(admin.address)
scenario.register(oracle)

consumer = ExchangeRateConsumer(oracle.address)
scenario.register(consumer)

scenario += oracle.updateOperatorList(operators = sp.set([operatorA.address, operatorB.address])).run(sender = admin)
scenario += oracle.registerFeed(currencyPair = "USDEUR", cost = sp.mutez(1000)).run(sender = admin)
scenario += oracle.updateFeed(currencyPair = "USDEUR", value = sp.nat(92), precision = sp.nat(2), timestamp = sp.timestamp(0), source = "Trusted Source").run(sender = operatorA)

scenario += consumer.sendQuery(currencyPair = "USDEUR").run(sender = caller, amount = sp.mutez(1000))
scenario.verify(consumer.data.value == 92)
scenario.verify(consumer.data.currencyPair == "USDEUR")