plutus VS openzeppelin-contracts

Plutus-related issues in Plutus repo https://github.com/input-output-hk/plutus/issues Cardano node-related issues in the Cardano node repo https://github.com/input-output-hk/cardano-node

Plutus (Haskell) is a statically typed programming language wired for writing reliable smart contracts on the Cardano blockchain. It is also a functional programming language, which means programs are composed as sets of mathematical functions for execution.

* https://github.com/input-output-hk/plutus

There's quite a few recent Isabelle repos such as https://github.com/input-output-hk/high-assurance-legacy

I haven't worked there for a year or so and don't remember specifics like KLOCs, just that they're dotted around internal and public repos :)

PR for Improved Rational for on-chain size was merged into Plutus: https://github.com/input-output-hk/plutus/commit/6d8d25d1e84b2a4278da1036aab23da4161b8df8

Cardano also suffers from the issue of the size of Plutus script being too big. One script can eat up to 20% of block which renders the overall efficiency even worse.

They're working on script libraries where you can reference a script in another UTXO rather than having to reinclude it every time. This is mentioned in some videos (I think in November's mid month update and Cardano 360), if you don't have time to watch those it's mentioned in michaelpj's comment here along with some other optimisations they're working on https://github.com/input-output-hk/plutus/issues/4174

There is a discussion on GitHub about this. The second solution in MPJs reply is what you are suggesting.

About to say that lol. Here are more info.https://plutus-apps.readthedocs.io/en/latest/index.htmlhttps://github.com/input-output-hk/plutushttps://docs.cardano.org/plutus/learn-about-plutus

Lets look the events of Open Zeppelin’s ERC20 token contract:

ERC-777 is difficult to implement properly, due to its susceptibility to different forms of attack(opens in a new tab). It is recommended to use ERC-20 instead. This page remains as a historical archive.

This depends if you're writing a contract from scratch or using existing code. If you're making something new, then yes (recommend not to use THE most recent available, always better to go with tried and tested). For existing projects, never try to override the solidity version. This may be a pain with "@" imports - ideally everyone should specify the library version (e.g. https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.1/contracts/token/ERC20/ERC20.sol).