A transaction generator for the Harmony blockchain
Transaction Generator Python library
This is for python 3.6+ only
A transaction generator library for the Harmony Blockchain. It utilizes the CLI to generate transactions.
Documentation can be found here and example scripts
that use the transaction generator can be found in the root of this directory with the suffix
Note that this only works on MacOS or Linux. It could possibly work on WSL, but this is untested.
You can install the library from pypi using the following command:
python3 -m pip install harmony-transaction-generator
You will require the latest version of
pyhmy (which may not install if you already have it). You can get the latest with the following command:
python3 -m pip install pyhmy --upgrade
Clone this repo and run:
Example script when running for devnet can be seen here
You can run
localnet_example.py if you have a localnet running. To start a localnet, reference the main harmony repo
to set up your ev environment, then run
test/debug.sh in the main repo.
The localnet is an easy way to develop your scripts without relying or using real network currency.
Important note about funding keys
One must have keys in the keystore that have funds on ALL shards (if one wishes to funds accounts on all shards). Note that one account does NOT have to have funds on all shard, but across all accounts in the keystore, there should be funds on all shards
This is because the library only does same shard transfers when funding to be conservative.
How it works
The docs can be found here.
Take a look at the
localnet_example.py for some idea of how it works.
Essentially, it follows a source / sink model for transaction generation (explained more in the
here). Moreover, the annotations of the config in
should give a better idea of how to use the library.
A video demoing library can be seen here
analysis module of this library has a
verify_transaction function that looks at the transaction logs and checks
if said transactions appear on the blockchain. Refer to here for mode details
on how it works.
The library logs everything it can, so one can read the log files to analyze it. The filepath/filename can be accessed with
filename attribute of the logger, for example
Note that all times in the logs are in UTC.
The package has NOT been thoroughly tested so please report bugs and/or PR fixes if you find any, thank you!
Troubleshooting Errors While Testing
- Backup and clear keystore at
- Update pyhmy to latest version, can be checked here.
Check version with
python3 -m pip list | grep pyhmy
current balance is not enough for requested transfer, try increasing the 'INIT_SRC_ACC_BAL_PER_SHARD' value in the config file
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