hi, can any one tell me how to convert ABI back to solidity code?

You can't reverse engineer the algorithm with just the ABI, but you can read the function names and make an interface for calling the contract from other contracts

By hand is probably best, but I did try to search for an automated tool once

Also finished in the hackathon, if you use devpost would love a vote if you liked my project!🔥 https://devpost.com/software/rollo

Use https://www.npmjs.com/package/abi2solidity

Also I voted for you

You can convert abi to interface but can't get whole source code back
Well if you have bytecode you can decompile but you have to know specifics of evm for further exploration.

https://ethereum.stackexchange.com/a/76493/54659

The automated tools are listed in the pinned message

Not quite into solidity code but interactable, assuming their abi matches their actual function signatures. You can do some fun things with abi editing

We have a start on an ML reverse engineer based on mapping bytecode to verified code but in most instances you're better off just launching the bytecode on a sidechain and brute force analyzing the behaviour with a cli suite like bw

Try this: https://github.com/ethereumjs/ethereumjs-abi

It works most of the time 😉