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yurial / YuWaves

Object-oriented library for the Waves blockchain platform

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YuWaves

YuWaves is an object-oriented Python interface to the Waves blockchain platform.

Getting Started

You can install YuWaves using:

pip install yuwaves

Documentation

The library utilizes classes to represent various Waves data structures:

  • yuwaves.Address
  • yuwaves.Asset
  • yuwaves.AssetPair
  • yuwaves.Order

Code Example

import yuwaves as pw

myAddress = pw.Address(privateKey='CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S')
otherAddress = pw.Address('3PNTcNiUzppQXDL9RZrK3BcftbujiFqrAfM')
myAddress.sendWaves(otherAddress, 10000000)
myToken = myAddress.issueAsset('Token1', 'My Token', 1000, 0)
while not myToken.status():
	pass
myAddress.sendAsset(otherAddress, myToken, 50)

Address Class

yuwaves.Address(address, publicKey, privateKey, seed) Creates a new Address object

attributes:

  • address
  • publicKey
  • privateKey
  • seed

methods:

balance(assetId='', confirmations=0) returns balance of Waves or other assets

assets() returns a list of assets owned by the address

issueAsset(name, description, quantity, decimals=0, reissuable=False, txFee=DEFAULT_ASSET_FEE, timestamp=0) issue a new asset

reissueAsset(Asset, quantity, reissuable=False, txFee=DEFAULT_ASSET_FEE, timestamp=0) reissue an asset

burnAsset(Asset, quantity, txFee=DEFAULT_ASSET_FEE, timestamp=0) burn the specified quantity of an asset

sendWaves(recipient, amount, attachment='', txFee=DEFAULT_TX_FEE, timestamp=0) send specified amount of Waves to recipient

massTransferWaves(transfers, attachment='', timestamp=0) sending Waves tokens via a mass transfer

sendAsset(recipient, asset, amount, attachment='', txFee=DEFAULT_TX_FEE, timestamp=0) send specified amount of an asset to recipient

massTransferWaves(self, transfers, attachment='', timestamp=0) sending an asset via mass transfer

cancelOrder(assetPair, order) cancel an order

buy(assetPair, amount price, maxLifetime=30*86400, matcherFee=DEFAULT_MATCHER_FEE, timestamp=0) post a buy order

tradableBalance(assetPair) get tradable balance for the specified asset pair

sell(assetPair, amount, price, maxLifetime=30*86400, matcherFee=DEFAULT_MATCHER_FEE, timestamp=0) post a sell order

lease(recipient, amount, txFee=DEFAULT_LEASE_FEE, timestamp=0) post a lease transaction

leaseCancel(leaseId, txFee=DEFAULT_LEASE_FEE, timestamp=0) cancel a lease

getOrderHistory(assetPair) get order history for the specified asset pair

cancelOpenOrders(assetPair) cancel all open orders for the specified asset pair

deleteOrderHistory(assetPair) delete order history for the specified asset pair

createAlias(alias, txFee=DEFAULT_ALIAS_FEE, timestamp=0) create alias

sponsorAsset(assetId, minimalFeeInAssets, txFee=yuwaves.DEFAULT_SPONSOR_FEE, timestamp=0) sponsoring assets

setScript(script, txFee=yuwaves.DEFAULT_SCRIPT_FEE, timestamp=0) sets a script for this address

dataTransaction(data, timestamp=0) sets data for the account. data should be a json array with entries including type (bool, binary, int, string), key and value

setScript(scriptSource, txFee=yuwaves.DEFAULT_SCRIPT_FEE, timestamp=0) issue a smart asset

setAssetScript(asset, scriptSource, txFee=yuwaves.DEFAULT_ASSET_SCRIPT_FEE, timestamp=0) set a new script for a smart asset

Asset Class

yuwaves.Asset(assetId) Creates a new Asset object

attributes:

  • status
  • assetId
  • issuer
  • name
  • description
  • quantity
  • decimals = 0
  • reissuable = False

methods:

status() returns 'Issued' if the asset exists

AssetPair Class

yuwaves.AssetPair(asset1, asset2) Creates a new AssetPair object with 2 Asset objects

attributes:

  • asset1
  • asset2

methods:

orderbook() get order book

ticker() get ticker with 24h ohlcv data

last() get traded price

open() get 24h open price

high() get 24h high price

low() get 24h low price

close() get 24h close price (same as last())

vwap() get 24h vwap price

volume() get 24h volume

priceVolume() get 24h price volume

trades(n) get the last n trades

trades(from, to) get the trades in from/to interval

candles(timeframe, n) get the last n candles in the specified timeframe

candles(timeframe, from, to) get the candles in from/to interval in the specified timeframe

Order Class

yuwaves.Order(orderId, assetPair, address='') Creates a new Order object

attributes:

  • status
  • orderId
  • assetPair
  • address
  • matcher
  • matcherPublicKey

methods:

status() returns current order status cancel() cancel the order

Other functions

yuwaves.setNode(node, chain, chain_id) set node URL ('http://ip-address:port') and chain (either 'mainnet' or 'testnet', or any other chain, if you also define the chain id)

yuwaves.setChain(chain, chain_id) set chain (either 'mainnet' or 'testnet', or any other chain if you also supply the chain id)

yuwaves.setOffline() switch to offline mode; sign tx locally without broadcasting to network

yuwaves.setOnline() switch to online mode; sign tx locally a broadcast to network

yuwaves.validateAddress(address) checks if the provided address is a valid Waves address

yuwaves.setMatcher(node) set matcher URL ('http://ip-address:port')

yuwaves.setDatafeed(node) set datafeed URL ('http://ip-address:port')

yuwaves.height() get blockchain height

yuwaves.lastblock() get last block

yuwaves.block(n) get block at specified height

yuwaves.tx(id) get transaction details

yuwaves.symbols() get list of symbol-asset mapping

yuwaves.markets() get all traded markets with tickers

yuwaves.{SYMBOL_NAME} get predefined asset for the specified symbol (yuwaves.WAVES, yuwaves.BTC, yuwaves.USD,...)

Default Fees

The fees for waves/asset transfers, asset issue/reissue/burn and matcher transactions are set by default as follows:

  • DEFAULT_TX_FEE = 100000
  • DEFAULT_ASSET_FEE = 100000000
  • DEFAULT_MATCHER_FEE = 1000000
  • DEFAULT_LEASE_FEE = 100000
  • DEFAULT_ALIAS_FEE = 100000
  • DEFAULT_SPONSOR_FEE = 100000000
  • DEFAULT_SCRIPT_FEE = 100000

More Examples

Playing with addresses:

import yuwaves as pw

# generate a new address
myAddress = pw.Address()  

# set an address with an address
myAddress = pw.Address('3P6WfA4qYtkgwVAsWiiB6yaea2X8zyXncJh')

# get an existing address from seed
myAddress = pw.Address(seed='seven wrist bargain hope pattern banner plastic maple student chaos grit next space visa answer')

# get an existing address from privateKey
myAddress = pw.Address(privateKey='CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S')

# get an existing address from a publicKey
address = pw.Address(publicKey=“EYNuSmW4Adtcc6AMCZyxkiHMPmF2BZ2XxvjpBip3UFZL”)

# get an address from a seed with a different nonce (This is especially useful for accessing addresses generated by nodes)
myAddress = pw.Address(seed='seven wrist bargain hope pattern banner plastic maple student chaos grit next space visa answer', nonce=1)

Balances:

import yuwaves as pw

myAddress = pw.Address('3P6WfA4qYtkgwVAsWiiB6yaea2X8zyXncJh')

# get Waves balance
print("Your balance is %18d" % myAddress.balance())

# get Waves balance after 20 confirmations 
print("Your balance is %18d" % myAddress.balance(confirmations = 20))

# get an asset balance
print("Your asset balance is %18d" % myAddress.balance('DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J'))

Waves and asset transfers:

import yuwaves as pw

myAddress = pw.Address(privateKey='CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S')

# send Waves to another address
myAddress.sendWaves(recipient = pw.Address('3PNTcNiUzppQXDL9RZrK3BcftbujiFqrAfM'),
                    amount = 100000000)

# send asset to another address
myToken = pw.Asset('4ZzED8WJXsvuo2MEm2BmZ87Azw8Sx7TVC6ufSUA5LyTV')
myAddress.sendAsset(recipient = pw.Address('3PNTcNiUzppQXDL9RZrK3BcftbujiFqrAfM'),
                    asset = myToken,
                    amount = 1000)

Issuing an asset:

import yuwaves as pw

myToken = myAddress.issueAsset( name = "MyToken",
                                description = "This is my first token",
                                quantity = 1000000,
                                decimals = 2 )

Create an alias:

import yuwaves as pw

pw.setNode(node = 'http://127.0.0.1:6869', chain = 'testnet')

myAddress = pw.Address(privateKey='CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S')
myAddress.createAlias("MYALIAS1")

Mass payment:

import yuwaves as pw

recipients =   ['3PBbp6bg2YEnHfdJtYM7jzzXYQeb7sx5oFg',
                '3P4A27aCd3skNja46pcgrLYEnK36TkSzgUp',
                '3P81U3ujotNUwZMWALdcJQLzBVbrAuUQMfs',
                '3PGcKEMwQcEbmeL8Jhe9nZQRBNCNdcHCoZP',
                '3PKjtzZ4FhKrJUikbQ1hRk5xbwVKDyTyvkn']

myAddress = pw.Address(privateKey = "CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S")

for address in recipients:
	myAddress.sendWaves(pw.Address(address), 1000000)

Mass transfer of Waves (feature 11)

import yuwaves as pw

transfers = [
	{ 'recipient': '3N1xca2DY8AEwqRDAJpzUgY99eq8J9h4rB3', 'amount': 1 },
	{ 'recipient': '3N3YWbQ27NnK7tek6ASFh38Bj93guLxxSi1', 'amount': 2 },
	{ 'recipient': '3MwiB5UkWxt4X1qJ8DQpP2LpM3m48V1z5rC', 'amount': 3 }
]

address = pw.Address(privateKey = "CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S")
address.massTransferWaves(transfers)

Mass transfer of Assets (feature 11)

import yuwaves as pw

transfers = [
	{ 'recipient': '3N1xca2DY8AEwqRDAJpzUgY99eq8J9h4rB3', 'amount': 1 },
	{ 'recipient': '3N3YWbQ27NnK7tek6ASFh38Bj93guLxxSi1', 'amount': 2 },
	{ 'recipient': '3MwiB5UkWxt4X1qJ8DQpP2LpM3m48V1z5rC', 'amount': 3 }
]

address = pw.Address(privateKey = "CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S")
address.massTransferAssets(transfers, pw.Asset('9DtBNdyBCyViLZHptyF1HbQk73F6s7nQ5dXhNHubtBhd'))

Data Transaction:

import yuwaves as py

myAddress = py.Address(privateKey='CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S')

data = [{
        'type':'string', 
        'key': 'test', 
        'value':'testval'
        }]

myAddress.dataTransaction(data)

Token airdrop:

import yuwaves as pw

myAddress = pw.Address(privateKey = '`')
myToken = pw.Asset('4ZzED8WJXsvuo2MEm2BmZ87Azw8Sx7TVC6ufSUA5LyTV')
amount = 1000

with open('recipients.txt') as f:
	lines = f.readlines()
for address in lines:
	myAddress.sendAsset(pw.Address(address.strip()), myToken, amount)

Add a script to an account:

import yuwaves as pw
import base64

pw.setNode(node='<node>', chain='testnet')

script = 'match tx { \n' + \
'  case _ => true\n' + \
'}'
address = pw.Address(privateKey = "<private key>")
tx = address.setScript(script, txFee=1000000)

Issue a Smart Asset

imort yuwaves as pw
import base64

pw.setNode(node='<node>', chain='testnet')

script = 'match tx { \n' + \
'  case _ => true\n' + \
'}'
address = pw.Address(privateKey = '<private key>')
tx = address.issueSmartAsset('smartTestAsset', 'an asset for testingsmart assets', 1000, script, 2)

Set a new script for a Smart Asset

import yuwaves as pw
import base64

pw.setNode(node='<node>', chain='testnet')

script = 'match tx { \n' + \
'  case _ => true\n' + \
'}'
address = pw.Address(privateKey = '<private key>')
tx = address.setAssetScript(pw.Asset('<asset id>'), script)

Playing with Waves Matcher node (DEX):

import yuwaves as pw
from decimal import Decimal

# set Matcher node to use
pw.setMatcher(node = 'http://127.0.0.1:6886')

# post a buy order
BTC = pw.Asset('4ZzED8WJXsvuo2MEm2BmZ87Azw8Sx7TVC6ufSUA5LyTV')
USD = pw.Asset('6wuo2hTaDyPQVceETj1fc5p4WoMVCGMYNASN8ym4BGiL')
BTC_USD = pw.AssetPair(BTC, USD)
myOrder = myAddress.buy(assetPair = BTC_USD, amount = Decimal('15'), price = Decimal('950.75'))

# post a sell order
WCT = pw.Asset('6wuo2hTaDyPQVceETj1fc5p4WoMVCGMYNASN8ym4BGiL')
Incent = pw.Asset('FLbGXzrpqkvucZqsHDcNxePTkh2ChmEi4GdBfDRRJVof')
WCT_Incent = pw.AssetPair(WCT, Incent)
myOrder = myAddress.sell(assetPair = WCT_Incent, amount = Decimal('100'), price = Decimal('25'))

# post a buy order using Waves as price asset
BTC = pw.Asset('4ZzED8WJXsvuo2MEm2BmZ87Azw8Sx7TVC6ufSUA5LyTV')
BTC_WAVES = pw.AssetPair(BTC, pw.WAVES)
myOrder = myAddress.buy(assetPair = BTC_WAVES, amount = Decimal('1'), price = Decimal('50'))

# cancel an order
myOrder.cancel()
# or
myAddress.cancelOrder(assetPair, myOrder)

Getting Market Data from Waves Data Feed (WDF):

import yuwaves as pw

# set the asset pair
WAVES_BTC = pw.AssetPair(pw.WAVES, pw.BTC)

# get last price and volume
print("%s %s" % (WAVES_BTC.last(), WAVES_BTC.volume()))

# get ticker
ticker = WAVES_BTC.ticker()
print(ticker['24h_open'])
print(ticker['24h_vwap'])

# get last 10 trades
trades = WAVES_BTC.trades(10)
for t in trades:
	print("%s %s %s %s" % (t['buyer'], t['seller'], t['price'], t['amount']))
	
# get last 10 daily OHLCV candles
ohlcv = WAVES_BTC.candles(1440, 10)
for t in ohlcv:
	print("%s %s %s %s %s" % (t['open'], t['high'], t['low'], t['close'], t['volume']))

LPOS

import yuwaves as pw

# connect to a local testnet node
pw.setNode(node = 'http://127.0.0.1:6869', chain = 'testnet')

myAddress = pw.Address(privateKey = 'CsBpQpNE3Z1THNMS9vJPaXqYwN9Hgmhd9AsAPrM3tiuJ')
minerAddress = pw.Address('3NBThmVJmcexzJ9itP9KiiC2K6qnGQwpqMq')

# lease 1000 Waves to minerAddress
leaseId = myAddress.lease(minerAddress, 100000000000)

# revoke the lease
myAddress.leaseCancel(leaseId)

Using YuWaves in a Python shell

Check an address balance:

>>> import yuwaves as pw
>>> pw.Address('3P31zvGdh6ai6JK6zZ18TjYzJsa1B83YPoj')
address = 3P31zvGdh6ai6JK6zZ18TjYzJsa1B83YPoj
publicKey = 
privateKey = 
seed = 
balances:
  Waves = 1186077288304570
  BDMRyZsmDZpgKhdM7fUTknKcUbVVkDpMcqEj31PUzjMy (Tokes) = 43570656915
  RRBqh2XxcwAdLYEdSickM589Vb4RCemBCPH5mJaWhU9 (Ripto Bux) = 4938300000000
  4rmhfoscYcjz1imNDvtz45doouvrQqDpbX7xdfLB4guF (incentCoffee) = 7
  Ftim86CXM6hANxArJXZs2Fq7XLs3nJvgBzzEwQWwQn6N (Waves) = 2117290600000000
  E4ip4jzTc4PCvebYn1818T4LNoYBVL3Y4Y4dMPatGwa9 (BitCoin) = 500000000000
  FLbGXzrpqkvucZqsHDcNxePTkh2ChmEi4GdBfDRRJVof (Incent) = 12302659925430
  GQr2fpkfmWjMaZCbqMxefbiwgvpcNgYdev7xpuX6xqcE (KISS) = 1000
  DxG3PLganyNzajHGzvWLjc4P3T2CpkBGxY4J9eJAAUPw (UltraCoin) = 200000000000000
  4eWBPyY4XNPsFLoQK3iuVUfamqKLDu5o6zQCYyp9d8Ae (LIKE) = 1000
>>>

Generate a new address:

>>> import yuwaves as pw
>>> pw.Address()
address = 3P6WfA4qYtkgwVAsWiiB6yaea2X8zyXncJh
publicKey = EYNuSmW4Adtcc6AMCZyxkiHMPmF2BZ2XxvjpBip3UFZL
privateKey = CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S
seed = seven wrist bargain hope pattern banner plastic maple student chaos grit next space visa answer
balances:
  Waves = 0
>>>

Check an asset:

>>> import yuwaves as pw
>>> pw.Asset('DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J')
status = Issued
assetId = DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J
issuer = 3PPKF2pH4KMYgsDixjrhnWrPycVHr1Ye37V
name = WavesCommunity
description = Waves community token.
quantity = 1000000000
decimals = 2
reissuable = False

Post an order and check its status:

>>> myOrder = myAddress.buy(pw.AssetPair(token1, token2), Decimal('1'), Decimal('25'))
>>> myOrder
status = Accepted
id = ARZdYgfXz3ksRMvhnGeLLJnn3CQnz7RCa7U6dVw3zert
asset1 = AFzL992FQbhcgSZGKDKAiRWcjtthM55yVCE99hwbHf88
asset2 = 49Aha2RR2eunR3KZFwedfdi7K9v5MLQbLYcmVdp2QkZT
sender.address = 3P6WfA4qYtkgwVAsWiiB6yaea2X8zyXncJh
sender.publicKey = EYNuSmW4Adtcc6AMCZyxkiHMPmF2BZ2XxvjpBip3UFZL
matcher = http://127.0.0.1:6886

Cancel the order

>>> myOrder.cancel()
>>> myOrder
status = Cancelled
id = ARZdYgfXz3ksRMvhnGeLLJnn3CQnz7RCa7U6dVw3zert
asset1 = AFzL992FQbhcgSZGKDKAiRWcjtthM55yVCE99hwbHf88
asset2 = 49Aha2RR2eunR3KZFwedfdi7K9v5MLQbLYcmVdp2QkZT
sender.address = 3P6WfA4qYtkgwVAsWiiB6yaea2X8zyXncJh
sender.publicKey = EYNuSmW4Adtcc6AMCZyxkiHMPmF2BZ2XxvjpBip3UFZL
matcher = http://127.0.0.1:6886

Offline signing and custom timestamps

Offline signing a future transaction:

>>> import yuwaves as pw
>>> pw.setOffline()
>>> myAddress=pw.Address(privateKey="F2jVbjrKzjUsZ1AQRdnd8MmxFc85NQz5jwvZX4BXswXv")
>>> recipient=pw.Address("3P8Ya6Ary5gzwnzbBXDp3xjeNG97JEiPcdA")
# sign a future tx to transfer 100 WAVES to recipient
# the tx is valid on Jan 1st, 2020 12:00pm
>>> myAddress.sendWaves(recipient, amount=100e8, timestamp=1577880000000)
{'api-endpoint': '/assets/broadcast/transfer',
 'api-type': 'POST',
 'api-data': '{"fee": 100000,
			   "timestamp": 1577880000000,
			   "senderPublicKey": "27zdzBa1q46RCMamZ8gw2xrTGypZnbzXs5J1Y2HbUmEv",
			   "amount": 10000000000,
			   "attachment": "",
			   "recipient": "3P8Ya6Ary5gzwnzbBXDp3xjeNG97JEiPcdA"
			   "signature": "YetPopTJWC4WBPXbneWv9g6YEp6J9g9rquZWjewjdQnFbmaxtXjrRsUu69NZzHebVzUGLrhQiFFoguXJwdUn8BH"}'}

Offline signing time lock/unlock transactions:

>>> import yuwaves as pw
>>> pw.setOffline()
>>> myAddress=pw.Address(privateKey="F2jVbjrKzjUsZ1AQRdnd8MmxFc85NQz5jwvZX4BXswXv")
# generate a lockbox address
>>> lockAddress=pw.Address()
# sign the 'lock' tx to send 100e8 to the lockbox (valid on Nov 1st, 2017)
>>> myAddress.sendWaves(lockAddress, 100e8, timestamp=1509537600000)
{'api-endpoint': '/assets/broadcast/transfer',
 'api-type': 'POST',
 'api-data': '{"fee": 100000,
               "timestamp": 1509537600000,
               "senderPublicKey": "27zdzBa1q46RCMamZ8gw2xrTGypZnbzXs5J1Y2HbUmEv",
               "amount": 10000000000,
               "attachment": "",
               "recipient": "3P3UbyQM9W7WzTgjYkLuBrPZZeWsiUtCcpv",
               "signature": "5VgT6qWxJwxEyrxFNfsi67QqbyUiGq9Ka7HVzgovRTTDT8nLRyuQv2wBAJQhRiXDkTTV6zsQmHnBkh8keCaFPoNT"}'}
# sign the 'unlock' tx to send funds back to myAddress (valid on Jan 1st, 2020)
>>> lockAddress.sendWaves(myAddress, 100e8-200000, txFee=200000, timestamp=1577880000000)
{'api-endpoint': '/assets/broadcast/transfer',
 'api-type': 'POST',
 'api-data': '{"fee": 200000,
               "timestamp": 1577880000000,
			   "senderPublicKey": "52XnBGnAVZmw1CHo9aJPiMsVMiTWeNGSNN9aYJ7cDtx4",
			   "amount": 9999800000,
			   "attachment": "",
			   "recipient": "3P7tfdCaTyYCfg5ojxNahEJDSS4MZ7ybXBY",
			   "signature": "3beyz1sqKefP96LaXWT3CxdPRW86DAxcj6wgWPyyKq3SgdotVqnKyWXDyeHnBzCq1nC7JA9CChTmo1c1iVAv6C4T"}'}
# delete lockbox address and private key
>>> del lockAddress

Connecting to a different node or chain

YuWaves supports both mainnet and testnet chains. By default, YuWaves connects to the mainnet RPC server at https://nodes.wavesnodes.com. It's possible to specify a different server and chain with the setNode() function

import yuwaves as pw

# connects to a local testnet node
pw.setNode(node = 'http://127.0.0.1:6869', chain = 'testnet')

# connects to a local mainnet node
pw.setNode(node = 'http://127.0.0.1:6869', chain = 'mainnet')

License

Code released under the MIT License.

About

Object-oriented library for the Waves blockchain platform

License:MIT License

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