ExWeb3EcRecover

Library for recovering and verifying public keys from signatures,

Installation

This package relies on ExSecp256k1 which uses Rust. Please visit rusts website and install it.

The package can be installed by adding ex_web3_ec_recover to your list of dependencies in mix.exs:

def deps do
  [
    {:ex_web3_ec_recover, "~> 0.2.0"}
  ]
end

Usage

Personal Sign

iex> ExWeb3EcRecover.recover_personal_signature("hello world", "0x1dd3657c91d95f350ab25f17ee7cbcdbccd3f5bc52976bfd4dd03bd6bc29d2ac23e656bee509ca33b921e0e6b53eb64082be1bb3c69c3a4adccd993b1d667f8d1b")
"0xb117a8bc3ecf2c3f006b89da6826e49b4193977a"

Typed Sign (Types 3 and 4)

 iex>  types: %{
        "Message" => [%{"name" => "data", "type" => "string"}],
        "EIP712Domain" => [
          %{
            "name" => "name",
            "type" => "string"
          },
          %{
            "name" => "version",
            "type" => "string"
          },
          %{
            "name" => "chainId",
            "type" => "uint256"
          },
          %{
            "name" => "verifyingContract",
            "type" => "address"
          }
        ]
      },
      primary_type: "Message",
      message: %{
        "data" => "test"
      },
      domain: %{
        "name" => "example.metamask.io",
        "version" => "3",
        "chainId" => 1,
        "verifyingContract" => "0x"
      }
    }
iex> ExWeb3EcRecover.recover_typed_signature(message, sig, :v4)
"0x29c76e6ad8f28bb1004902578fb108c507be341b"

Documentation

Hosted on https://hexdocs.pm/ex_web3_ec_recover/ExWeb3EcRecover.html

Authors

Charlie Graham & Jakub Hajto (Hawku, Inc)

Releases

0.2 Support for Typed Signatures (EIP 712) and signatures using Ledger devices
0.1 Initial Release

ExWeb3EcRecover is released under the MIT License.