#+TITLE: Solidity Layer

#+TAGS: dsl|layer|programming

[[file:img/solidity.png]]

* Table of Contents                     :TOC_5_gh:noexport:
- [[#description][Description]]
  - [[#features][Features:]]
- [[#install][Install]]
  - [[#layer][Layer]]
  - [[#linter][Linter]]
    - [[#solc][solc]]
    - [[#ethlint][Ethlint]]
- [[#options][Options]]
- [[#key-bindings][Key bindings]]

* Description
A layer to support Solidity development in Spacemacs.

** Features:
- Syntax highlighting
- Syntax checking
- Gas estimation

* Install
** Layer
To use this configuration layer, add it to your =~/.spacemacs=. You will need to
add =solidity= to the existing =dotspacemacs-configuration-layers= list in this
file.

** Linter
*** solc
To use the solc flycheck checker, install [[https://solidity.readthedocs.io][solc]], and enable it in your =~/.spacemacs=.

#+BEGIN_SRC emacs-lisp
  (solidity :variables
            solidity-flycheck-solc-checker-active t)
#+END_SRC

Please note that you can't use [[https://github.com/ethereum/solc-js][solc-js]] for the solc flycheck checker.

*** Ethlint
To use solium flycheck checker, install [[https://github.com/duaraghav8/Ethlint][Ethlint]].

#+BEGIN_SRC sh
  npm i -g ethlint
#+END_SRC

Then enable it in your =~/.spacemacs=:

#+BEGIN_SRC emacs-lisp
  (solidity :variables
            solidity-flycheck-solium-checker-active t)
#+END_SRC

And make sure that =.soliumrc.json= exists in the root directory of your DApp:

#+BEGIN_SRC sh
  solium --init
#+END_SRC

* Options

| Variable                                  | Default value | Description                                                |
|-------------------------------------------+---------------+------------------------------------------------------------|
| =solidity-flycheck-solc-checker-active=   | =nil=         | If non-nil, use solc flycheck checker for Solidity Mode.   |
| =solidity-flycheck-solium-checker-active= | =nil=         | If non-nil, use solium flycheck checker for Solidity Mode. |

* Key bindings

| Key binding | Description           |
|-------------+-----------------------|
| ~SPC m g~   | Estimate gas at point |