Solidity Language Server

The fastest Solidity language server — go-to-definition, references, rename, completions, hover, and more. See benchmarks.

Install

cargo install solidity-language-server

Or download a pre-built binary from the latest release.

Benchmarks

• Single file benchmark — Shop.sol results
• Foundry project benchmark — Pool.sol results
• Foundry test contract benchmark (.t.sol) — PoolManager.t.sol results

p95 latency. - = unsupported, empty, error, or crash.

Docs

• DOCS.md - Docs on how to install.
• FEATURES.md — full LSP feature set and roadmap
• CONTRIBUTING.md — development setup, project structure, and how to contribute
• CHANGELOG.md — release history

Neovim

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.
    ["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

# 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"]

AI Integrations

OpenCode

Add to ~/.config/opencode/config.json:

{
  "lsp": {
    "solidity-language-server": {
      "command": ["solidity-language-server", "--stdio"],
      "extensions": [".sol"],
      "initialization": {
        "inlayHints": {
          "parameters": true,
          "gasEstimates": true
        },
        "lint": {
          "enabled": true
        }
      }
    }
  }
}

Verify Release Binaries

Release binaries are GPG-signed. Download checksums-sha256.txt, checksums-sha256.txt.asc, and public-key.asc from the release:

gpg --import public-key.asc
gpg --verify checksums-sha256.txt.asc checksums-sha256.txt
sha256sum -c checksums-sha256.txt