[Ethereum] Call an existing python code inside a solidity smart contract

contract-designoraclespythonsolidity

I want to call some existing code (written in Python) inside my Ethereum smart contract (written in solidity). Is it possible to do that? if so, how can we do it?

Best Answer

EVM is isolated, which means there is no I/O to the outside world. However, you could program it in the way that your python code reacts on events published on-chain. This will not give you the ACID properties of a on-chain transaction, but it can be a valid solution depending on the usecase.

Related Solutions

Solidity – How to Call an Imported Contract Using Solidity Effectively

The error you have is not related to Populus:

   Dynamic exception type: boost::exception_detail::clone_impl<dev::solidity::InternalCompilerError>
   E std::exception::what: std::exception

It says Solidity cannot compile your contract because of a bug. Please repeat the issue by manually compiling the contracts from the command line and then issuing a bug report against Solidity with repeatable steps.

Also, update your Solidity to the latest version before doing this.

Python – How to Call a Deployed Smart Contract on Kovan Using Web3.py

Any smart contract call cannot change the Ethereum state.

You need to perform a transaction and pay the gas fee to make any state changes. There are no free state changes.

Use transact() instead of call(). You will also need to set up a local private key.

Best Answer

Related Solutions

Solidity – How to Call an Imported Contract Using Solidity Effectively

Python – How to Call a Deployed Smart Contract on Kovan Using Web3.py

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