# Solidity Language Server
[](https://crates.io/crates/solidity-language-server)
[](https://github.com/mmsaki/solidity-language-server/actions/workflows/test.yml)
[](https://github.com/mmsaki/solidity-language-server/actions/workflows/release.yml)
[](https://github.com/mmsaki/solidity-language-server/releases/latest)
[](https://t.me/+R1lW7xWJ55tlYzcx)
The fastest Solidity language server — go-to-definition, references, rename, completions, hover, and more. See [benchmarks](https://github.com/mmsaki/solidity-lsp-benchmarks).
## Install
```sh
cargo install solidity-language-server
```
Or download a pre-built binary from the [latest release](https://github.com/mmsaki/solidity-language-server/releases/latest).
## Features
- **Go to Definition** / **Go to Declaration** — jump to any symbol across files
- **Find References** — all usages of a symbol across the project
- **Rename** — project-wide symbol rename with prepare support
- **Hover** — signatures, NatSpec docs, function/error/event selectors, `@inheritdoc` resolution
- **Completions** — scope-aware with two modes (fast cache vs full recomputation)
- **Document Links** — clickable imports, type names, function calls
- **Document Symbols** / **Workspace Symbols** — outline and search
- **Formatting** — via `forge fmt`
- **Diagnostics** — from `solc` and `forge lint`
- **Signature Help** — parameter info on function calls, event emits, and mapping access
- **Inlay Hints** — parameter names and gas estimates
See [FEATURES.md](FEATURES.md) for the full LSP feature set and roadmap.
## Docs
- [FEATURES.md](FEATURES.md) — full LSP feature set and roadmap
- [CONTRIBUTING.md](CONTRIBUTING.md) — development setup, project structure, and how to contribute
- [CHANGELOG.md](CHANGELOG.md) — release history
## Neovim
```lua
return {
name = "Solidity Language Server",
cmd = { "solidity-language-server" },
root_dir = vim.fs.root(0, { "foundry.toml", ".git" }),
filetypes = { "solidity" },
root_markers = { "foundry.toml", ".git" },
on_attach = function(_, _)
vim.api.nvim_create_autocmd("BufWritePost", {
pattern = { "*.sol" },
callback = function()
vim.lsp.buf.format()
end,
})
end,
}
```
## Settings
Settings are passed via `initializationOptions` or `didChangeConfiguration`. All settings are optional — defaults are shown below.
```lua
-- Neovim: lsp/forge_lsp.lua
settings = {
["solidity-language-server"] = {
inlayHints = {
-- Show parameter name hints on function/event/struct calls.
parameters = true,
-- Show gas cost hints on functions annotated with
-- `/// @custom:lsp-enable gas-estimates`.
gasEstimates = true,
},
lint = {
-- Master toggle for forge lint diagnostics.
enabled = true,
-- Filter lints by severity. Empty = all severities.
-- Values: "high", "med", "low", "info", "gas", "code-size"
severity = {},
-- Run only specific lint rules by ID. Empty = all rules.
-- Values: "incorrect-shift", "unchecked-call", "erc20-unchecked-transfer",
-- "divide-before-multiply", "unsafe-typecast", "pascal-case-struct",
-- "mixed-case-function", "mixed-case-variable", "screaming-snake-case-const",
-- "screaming-snake-case-immutable", "unused-import", "unaliased-plain-import",
-- "named-struct-fields", "unsafe-cheatcode", "asm-keccak256", "custom-errors",
-- "unwrapped-modifier-logic"
only = {},
-- Suppress specific lint rule IDs from diagnostics.
exclude = {},
},
},
}
```
### Helix
```toml
# languages.toml
[language-server.solidity-language-server.config]
inlayHints.parameters = true
inlayHints.gasEstimates = true
lint.enabled = true
lint.severity = ["high", "med"]
lint.exclude = ["pascal-case-struct"]
```
## Verify Release Binaries
Release binaries are GPG-signed. Download `checksums-sha256.txt`, `checksums-sha256.txt.asc`, and [`public-key.asc`](public-key.asc) from the [release](https://github.com/mmsaki/solidity-language-server/releases/latest):
```sh
gpg --import public-key.asc
gpg --verify checksums-sha256.txt.asc checksums-sha256.txt
sha256sum -c checksums-sha256.txt
```