Interactive Python for Eos

What Is IPyEos

• IPyEos is a Smart Contracts test framework for Eos
• IPyEos is a Python binding for Eos

Installation

python3 -m pip install ipyeos

on the macOS platform, you may need to install gmp and zstd if you don't install them.

brew reinstall gmp
brew reinstall zstd

If your platform is Windows or MacOSX M1/M2, you also need to download an image that includes the ipyeos tool:

docker pull ghcr.io/uuosio/ipyeos:latest

If you have not installed the ipyeos image in Docker, then the ipyeos image will be automatically downloaded the first time you run ipyeos or eosdebugger.

On macOS, the recommended software for installing and running Docker is OrbStack. For other platforms, you can use Docker Desktop.

Test Examples

Example 1:

#test.py
import os
from ipyeos.chaintester import ChainTester

chaintester.chain_config['contracts_console'] = True

def test_example():
    t = ChainTester(True)
    with open('./hello/build/hello/hello.wasm', 'rb') as f:
        code = f.read()
    with open('./hello/build/hello/hello.abi', 'rb') as f:
        abi = f.read()
    t.deploy_contract('hello', code, abi)
    t.produce_block()

    t.push_action('hello', 'hi', {'nm': 'alice'}, {'hello': 'active'})
    t.produce_block()

Test:

ipyeos -m pytest -x -s tests/test.py

Restore from snapshot Example

def test_snapshot():
    # data_name = './data'
    # snapshot_dir = './snapshot-2023-06-18-01-eos-v6-0315729695.bin'
    # state_size = 32*1024*1024*1024
    if os.path.exists('./data/ddd'):
        shutil.rmtree('./data/ddd')
    state_size = 10*1024*1024
    data_name = './data'
    snapshot_dir = './data/snapshot-0000001ba25b3b5af4ba6cacecb68ef4238a50bb7134e56fe985b4355fbf7488.bin'

    t = ChainTester(True, data_dir=os.path.join(data_name, 'ddd'), config_dir=os.path.join(data_name, 'cd'), state_size=state_size, snapshot_dir=snapshot_dir)

Accessing Database Object Example

def test_database_object():
    # data_name = './data'
    # snapshot_dir = './snapshot-2023-06-18-01-eos-v6-0315729695.bin'
    # state_size = 32*1024*1024*1024
    if os.path.exists('./data/ddd'):
        shutil.rmtree('./data/ddd')
    state_size = 10*1024*1024
    data_name = './data'
    snapshot_dir = './data/snapshot-0000001ba25b3b5af4ba6cacecb68ef4238a50bb7134e56fe985b4355fbf7488.bin'

    # {'private': '5K3x5DPEbocfZSG8XD3RiyJAfPFH5Bd9ED15wtdEMbqzXCLPbma',
    #  'public': 'EOS5K93aPtTdov2zWDqYxVcMQ4GBT1hyEpED8tjzPuLsf31tPySNY'}

    # must call set_debug_producer_key and import_producer_key before create ChainTester
    eos.set_debug_producer_key('EOS5K93aPtTdov2zWDqYxVcMQ4GBT1hyEpED8tjzPuLsf31tPySNY')
    chaintester.import_producer_key('5K3x5DPEbocfZSG8XD3RiyJAfPFH5Bd9ED15wtdEMbqzXCLPbma')

    t = ChainTester(True, data_dir=os.path.join(data_name, 'ddd'), config_dir=os.path.join(data_name, 'cd'), state_size=state_size, snapshot_dir=snapshot_dir)
    logger.info("+++++producer keys: %s", t.chain.get_producer_public_keys())
    t.produce_block()
    logger.info("+++++++%s", t.api.get_info())

    idx = PermissionObjectIndex(t.db)
    perm = idx.find_by_owner('eosio.token', 'active')
    print(perm)

    # Private key: 5JBW9jddvqHY7inGEK2qWbGLYKeqm32NDYL3fLdYgMjnWxRjXLF
    # Public key: EOS6hM1U89jbHWyX8ArHttFzoGe21y7ehXvtN5q7GbDxYEa9NFXH2
    t.import_key('5JBW9jddvqHY7inGEK2qWbGLYKeqm32NDYL3fLdYgMjnWxRjXLF')
    keys = [KeyWeight(PublicKey.from_base58('EOS6hM1U89jbHWyX8ArHttFzoGe21y7ehXvtN5q7GbDxYEa9NFXH2'), 1)]
    perm.auth = Authority(1, keys, [], [])

    ret = idx.modify(perm)
    print('modify_by_id return:', ret)

    idx = PermissionObjectIndex(t.db)
    perm = idx.find_by_owner('eosio.token', 'active')
    print(perm)

Push Block Example:

def test_push_block():
    if os.path.exists('./data/ddd'):
        shutil.rmtree('./data/ddd')

    state_size = 10*1024*1024
    data_name = './data'

    snapshot_dir = './data/push_block/snapshot-0000003b83662343c208e965654f4d906ed7fad0372e13c246981cd076d379bb.bin'
    t = ChainTester(True, data_dir=os.path.join(data_name, 'ddd'), config_dir=os.path.join(data_name, 'cd'), state_size=state_size, snapshot_dir=snapshot_dir)
    t.free()

    snapshot_dir = ''
    t = ChainTester(True, data_dir=os.path.join(data_name, 'ddd'), config_dir=os.path.join(data_name, 'cd'), state_size=state_size, snapshot_dir=snapshot_dir)
    t.chain.abort_block()

    info = t.api.get_info()
    head_block_num = info['head_block_num']
    log = BlockLog('./data/push_block/blocks')
    logger.info("%s %s", head_block_num, log.head_block_num())
    num_count = log.head_block_num() - head_block_num

    for block_num in range(head_block_num+1, head_block_num+num_count+1):
        t.chain.push_block(log, block_num)

Building

To build this project, please follow the steps below:

1. Clone the source code from the repository:

git clone https://github.com/uuosio/ipyeos --branch main --recursive

2. Build the forked leap source code under the leap directory by following the instructions in the build-and-install-from-source documentation.

3. Build the Python release package:

cd ipyeos
./build.sh

4. Install the Python package

python3 -m pip install dist/pyeos-0.4.9**.whl

Run a Node

eosnode

Run a Debugging Server

eosdebugger

Testing

test example code

#test.py
import os
from ipyeos.chaintester import ChainTester

chaintester.chain_config['contracts_console'] = True

def test_example():
    t = ChainTester(True)
    with open('./hello/build/hello/hello.wasm', 'rb') as f:
        code = f.read()
    with open('./hello/build/hello/hello.abi', 'rb') as f:
        abi = f.read()
    t.deploy_contract('hello', code, abi)
    t.produce_block()

    t.push_action('hello', 'hi', {'nm': 'alice'}, {'hello': 'active'})
    t.produce_block()

ipyeos -m pytest -x -s tests/test.py

Run a Testnet

ipyeos -m ipyeos eosnode --data-dir dd --config-dir cd -p eosio --plugin eosio::producer_plugin --plugin eosio::chain_api_plugin --plugin eosio::producer_api_plugin -e --resource-monitor-space-threshold 99 --http-server-address 127.0.0.1:8889 --contracts-console --access-control-allow-origin="*"  --wasm-runtime eos-vm-jit

Also, you can run a test node with eosnode command directly.

eosnode --data-dir dd --config-dir cd -p eosio --plugin eosio::producer_plugin --plugin eosio::chain_api_plugin --plugin eosio::producer_api_plugin -e --resource-monitor-space-threshold 99 --http-server-address 127.0.0.1:8889 --contracts-console --access-control-allow-origin="*"  --wasm-runtime eos-vm-jit

Note

If you encounter the error message during running the above commands like Failed to load libpython3.7m.so!, try running the following command in your terminal:

export PYTHON_SHARED_LIB_PATH=path/to/libpython[.so|.dylib]

License

MIT