solang - Solidity Compiler for Solana, Substrate, and ewasm
Welcome to Solang, a new Solidity compiler written in rust which uses llvm as the compiler backend. Solang can compile Solidity for Solana, Substrate, and ewasm. Solang is source compatible with Solidity 0.7, with some caveats due to differences in the underlying blockchain.
Solang is under active development right now, and has extensive documentation.
Simple example
First build Solang or use the container, then write the following to flipper.sol:
contract flipper {
bool private value;
constructor(bool initvalue) public {
value = initvalue;
}
function flip() public {
value = !value;
}
function get() public view returns (bool) {
return value;
}
}
Build for Solana
Run:
Alternatively if you want to use the solang container, run:
docker run --rm -it -v $(pwd):/sources ghcr.io/hyperledger-labs/solang -v -o /sources --target solana /sources/flipper.sol
A file called flipper.abi
and bundle.so
. Now install @solana/solidity
:
npm install @solana/solidity
Save the following to flipper.js
:
const = require;
const = require;
const = require;
const FLIPPER_ABI = JSON.;
const PROGRAM_SO = ;
;
And now run:
node flipper.js
Build for Substrate
Run:
Alternatively if you want to use the solang container, run:
docker run --rm -it -v $(pwd):/sources ghcr.io/hyperledger-labs/solang -v -o /sources --target substrate /sources/flipper.sol
You will have a file called flipper.contract. You can use this directly in the Polkadot UI, as if your smart contract was written using ink!.
Tentative roadmap
Solang has a high level of compatibility with many blockchains. We are trying to ensure the compiler stays up to date with the newest Solidity syntax and features. In addition, we focus on bringing new performance optimizations and improve developer experience. Here is a brief description of what we envision for the next versions.
V0.2
Milestone | Status |
---|---|
Specify values as "1 sol" and "1e9 lamports" | In progress |
Solana SPL tokens compatibility | In progress |
V0.3
Milestone | Status |
---|---|
Call Rust contracts from Solidity | Not started |
Parse and resolve inline assembly | Completed |
Improvements in overflow checking | Not started |
V0.4
Milestone | Status |
---|---|
Call Solidity from Rust | Not started |
Generate code for inline assembly | Not started |
Improve management over optimization passes | Not Started |
Dead code elimination | Not started |
ewasm target | Not started |