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NomicFoundation

8 indexed repositories · View on GitHub

hardhat
Hardhat is a development environment to compile, deploy, test, and debug your Ethereum software.

TypeScript · 8507 stars
slang
Solidity compiler tooling by @NomicFoundation

Rust · 283 stars
hardhat-vscode
Solidity and Hardhat support for Visual Studio Code

TypeScript · 211 stars
solx
LLVM-based Solidity compiler.

Solidity · 186 stars
edr
An Ethereum development runtime implementation that can be reused to build new developer tools.

TypeScript · 108 stars
hardhat-website
Hardhat's website

HTML · 8 stars
solx-solidity
Solidity, the Smart Contract Programming Language

Solidity · 1 star
solx-llvm
solx fork of the LLVM framework.

LLVM · 1 star

Beginner friendly Everything

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Slang: parallelize per-file lowering, and stop serializing the AST unconditionally Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NomicFoundation/solx#720 · Opened Sep 18, 2026
Loopback fork URLs are sent through HTTP_PROXY/HTTPS_PROXY Open

NomicFoundation/edr#1762 · 1 assignee · Opened Sep 17, 2026
Invalid HTTPS_PROXY values are reported as unexpected Hardhat errors Open

status:needs-priority type:improvement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

NomicFoundation/hardhat#8614 · Opened Sep 17, 2026
Upgrade to EDR v0.21.0 Open

dependency:edr

NomicFoundation/hardhat#8612 · 1 assignee · Opened Sep 17, 2026
The Slang frontend reports every diagnostic as an error, including warnings Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

NomicFoundation/solx#714 · Opened Sep 16, 2026
`address.code.length` copies the code into memory in the Slang frontend Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 76/100

NomicFoundation/solx#713 · 1 reaction · Opened Sep 16, 2026
Use `micro-eth-signer` in `hardhat-verify` Open

NomicFoundation/hardhat#8605 · 1 assignee · Opened Sep 14, 2026
Provide command line utilities Open

type:epic

NomicFoundation/hardhat#8604 · 1 assignee · Opened Sep 14, 2026
[v2] Attached public library functions reject a `memory` receiver for a `calldata` parameter Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 78/100

NomicFoundation/slang#2150 · Opened Sep 14, 2026
[v2] Member access through a contract type name sees inherited declarations Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

NomicFoundation/slang#2149 · Opened Sep 14, 2026
[v2] `super.f` resolves to unimplemented base functions Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 68/100

NomicFoundation/slang#2148 · Opened Sep 14, 2026
[v2] Bare call to a public function accepts `memory` for `calldata` Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 54/100

NomicFoundation/slang#2147 · Opened Sep 14, 2026
[v2] ABI: include errors and events used by reachable code (library, free-function and qualified references), as solc does Open

rust

Difficulty 5/5 Over a week Newbie friendliness 35/100

NomicFoundation/slang#2131 · Opened Sep 13, 2026
[v2] ABI: library function parameters keep contract, interface and enum types by name in solc's JSON `type` Open

rust

Difficulty 3/5 1-2 days Newbie friendliness 58/100

NomicFoundation/slang#2130 · Opened Sep 13, 2026
[v2] IR: `function receive()` and `function fallback()` with the `function` keyword are ordinary functions, not the receive/fallback function Open

rust

Difficulty 3/5 1-2 days Newbie friendliness 78/100

NomicFoundation/slang#2129 · Opened Sep 13, 2026
Diagnostic source snippets point at the wrong line/column Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

NomicFoundation/solx#701 · Opened Sep 12, 2026
npm package stuck at 0.8.25 since 2025-08-12; releases v0.8.26–v0.8.29 were never published Open

status:needs-more-info

Difficulty 4/5 3-5 days Newbie friendliness 72/100

NomicFoundation/hardhat-vscode#759 · 1 comment · Opened Sep 2, 2026
Move to Mocha 12 in `hardhat-mocha` Open

NomicFoundation/hardhat#8589 · 1 assignee · Opened Aug 31, 2026
Re-evaluate benchmarking design Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

NomicFoundation/edr#1669 · Opened Aug 26, 2026
Re-design JSON-RPC cache Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

NomicFoundation/edr#1665 · Opened Aug 25, 2026
Guard against compiler download race condition Open

NomicFoundation/hardhat#8569 · 1 comment · 1 assignee · Opened Aug 24, 2026
EIP-712 canonical-type collection re-parses whole build infos Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NomicFoundation/edr#1663 · Opened Aug 24, 2026
Streaming JSON dominates the JS side of compiles - add a buffered fast path Open

NomicFoundation/hardhat#8565 · 1 assignee · Opened Aug 24, 2026
ethers' JS keccak is the hottest symbol in provider test suites - register a native implementation Open

NomicFoundation/hardhat#8564 · 1 comment · 1 assignee · Opened Aug 24, 2026
~1-1.6s of fixed JS startup on every Hardhat invocation Open

NomicFoundation/hardhat#8563 · 1 assignee · Opened Aug 24, 2026
Cold compiles use one core of 24 - raise solc job granularity Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

NomicFoundation/hardhat#8562 · Opened Aug 24, 2026
Add threat model document Open

NomicFoundation/hardhat#8559 · 1 assignee · Opened Aug 24, 2026
Solidity test runner fixed costs aren't amortised (per-call setup, fork creation) Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

NomicFoundation/edr#1661 · Opened Aug 24, 2026
Fuzz campaigns are serial within a test Open

NomicFoundation/edr#1660 · 1 assignee · Opened Aug 24, 2026
Provider records full per-step traces for every transaction, even on success Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NomicFoundation/edr#1657 · Opened Aug 24, 2026
All EVM keccak goes through the portable soft backend - enable asm-keccak Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

NomicFoundation/edr#1656 · Opened Aug 24, 2026
Per-opcode cheatcode inspector callbacks cost ~20-24% of Solidity test runs Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NomicFoundation/edr#1655 · Opened Aug 24, 2026
Chore: cleanup new `ProtocolHardfork` EDR owned type Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

NomicFoundation/edr#1633 · Opened Aug 19, 2026
Bare-filename imports of local files get a misleading "invalid npm syntax" error and no suggested fix Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

NomicFoundation/hardhat#8537 · Opened Aug 18, 2026
[mlir] Improve the internal fnptr dispatch table sizes Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

NomicFoundation/solx-llvm#144 · Opened Aug 18, 2026
Fork mode: look up chain protocol parameters by the remote chain ID, not the configured `chain_id` Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

NomicFoundation/edr#1614 · Opened Aug 11, 2026
Drop Holesky chain configs Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

NomicFoundation/edr#1613 · Opened Aug 11, 2026
Adopt tagged numbers to avoid accidental mixups Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NomicFoundation/edr#1610 · Opened Aug 11, 2026
MLIR: stop round-tripping modules through textual assembly across the worker process boundary Open

enhancement

NomicFoundation/solx#635 · 1 assignee · Opened Aug 5, 2026
Slang: sema-level contract-dependency analysis, and the circular bytecode reference error it enables Open

enhancement

NomicFoundation/solx#634 · 1 assignee · Opened Aug 5, 2026
CI docker mirror follow-ups: wait for mirror workflow, verify mirror tags against upstream digests Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NomicFoundation/edr#1593 · Opened Jul 31, 2026
Vendor pre-generated ODS output in the melior fork and solx-mlir — get tblgen out of proc-macro expansion for good Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

NomicFoundation/solx#622 · Opened Jul 30, 2026
Optimize provably bounded checked loop-counter steps in MLIR Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

NomicFoundation/solx-llvm#134 · Opened Jul 29, 2026
Investigate if it possible to avoid passing `ethers` in Chai Matchers Open

status:needs-decision

Difficulty 5/5 Over a week Newbie friendliness 35/100

NomicFoundation/hardhat#8473 · Opened Jul 29, 2026
[mlir] Add constant folders for Sol/Yul ops Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NomicFoundation/solx-llvm#132 · Opened Jul 28, 2026
[Sol] Implement the op verifiers recorded as TODOs Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NomicFoundation/solx-llvm#131 · Opened Jul 27, 2026
IntelliSense keyword completion doesn't work in Foundry projects and extension tries to load removed hardhat/register from Hardhat 3 Open

status:triaging

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NomicFoundation/hardhat-vscode#738 · Opened Jul 27, 2026
OP deposit transactions (type 0x7E) are rejected by mempool nonce validation, making canonical block replay impossible Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NomicFoundation/edr#1578 · 1 comment · Opened Jul 26, 2026
Feasibility study of memory safety static analysis of inline assembly Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

NomicFoundation/solx#604 · Opened Jul 24, 2026
Implicitly convert any type to `Void` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NomicFoundation/slang#1971 · Opened Jul 24, 2026

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