ergo-python-appkit

This is a wrapper around Ergo's appkit, which is based on scala/java. Jpype is used to map to the JVM and the jar running within. That means that Java needs to be installed for this package to work.

Installation

Installation can be done through pip. Currently the package is not available yet on PyPi so you need to refer directly to the github.

pip install git+https://github.com/ergo-pad/ergo-python-appkit.git

Usage

The ergo appkit can be accessed by importing java classes AFTER importing the appkit, like this:

import ergo_python_appkit.appkit
from org.ergoplatform.appkit import Address

myErgoAddress = Address.create("9gF2wmTWcEX2EZu5QY3dJwURep1HWsXjUZdVavVWESun4Sp8BYj")
#will print the ergotree belonging to the address
print(myErgoAddress.toErgoContract().getErgoTree())

There are also convenience methods created to allow for easier use from Python for appkit functionality that is used often.

An example of a simple intra wallet transaction send from the nodes wallet:

from ergo_python_appkit.appkit import ErgoAppKit
from org.ergoplatform.appkit import Address

appKit = ErgoAppKit("http://myergonode:9053","mainnet","http://api.ergoplatform.org","nodeapikey")
myAddress = "9gF2wmTWcEX2EZu5QY3dJwURep1HWsXjUZdVavVWESun4Sp8BYj"

#collect boxes to spend 1 erg
inputs = appKit.boxesToSpend(address=myAddress,nergToSpend=int(1e9))

#Define output box
outputBox = appKit.buildOutBox(
                value=int(1e9),
                tokens=None,
                registers=None,
                contract=appKit.contractFromAddress(myAddress)
            )

#Build the unsigned transaction
unsignedTx = appKit.buildUnsignedTransaction(
                inputs=inputs,
                outputs=[outputBox],
                fee=int(1e6),
                sendChangeTo=Address.create(myAddress).getErgoAddress()
            )

#Sign the transaction with the node
signedTx = appKit.signTransactionWithNode(unsignedTx)

#Send the transaction
appKit.sendTransaction(signedTx)