eip712sign

Small golang utility used to sign EIP-712 typed data or hashes, and EIP-191 personal messages. Supports:

• ledgers
• trezors
• mnemonics
• raw private keys

Installation

go install github.com/base/eip712sign

Flags

Usage of eip712sign:
  -address
    	Print address of signer and exit
  -data string
    	Data to be signed
  -hd-paths string
    	Hierarchical deterministic derivation path for mnemonic, ledger, or trezor (default "m/44'/60'/0'/0/0")
  -index int
    	Device index to use (if multiple devices are connected)
  -ledger
    	Use ledger device for signing
  -mnemonic string
    	Mnemonic to use for signing
  -prefix string
    	String that prefixes the data to be signed (default "vvvvvvvv")
  -private-key string
    	Private key to use for signing
  -skip-sender
    	Skip adding the --sender flag to forge script commands
  -suffix string
    	String that suffixes the data to be signed (default "^^^^^^^^")
  -text
    	Use EIP-191 message format for signing (default is EIP-712)
  -trezor
    	Use trezor device for signing
  -workdir string
    	Directory in which to run the subprocess (default ".")

Usage

eip712sign can either be run as a command wrapper, or data can be piped in via stdin. The former is recommended as it will only attempt to sign if the subprocess exit code is 0.

eip712sign --ledger -- <COMMAND>

or

<COMMAND> | eip712sign --ledger

Example signing some bytes output from a forge script:

eip712sign --ledger -- forge script --rpc-url <RPC_URL> SomeScript

eip712sign will parse the stdout from the subprocess, and by default, sign any hex string between the magic strings vvvvvvvv and ^^^^^^^^. This prefix + suffix can be configured using the -prefix and -suffix flags. In this example, SomeScript should print this to the console, for example:

function printDataToSign(bytes memory data) internal pure {
    console.log("vvvvvvvv");
    console.logBytes(data);
    console.log("^^^^^^^^");
}

...where data is 66 bytes in length for EIP-712 hashes, or JSON for EIP-712 typed data (can optionally be hex encoded).

Example output:

Compiling 5 files with 0.8.15
Solc 0.8.15 finished in 7.01s
Compiler run successful!
Script ran successfully.

== Logs ==
  vvvvvvvv
  0x19011b6ca1022dcb8ee88e2ab8dd1adf6f6bfa6af586f8b074e99c952e6e3c6befadd5c5183a56f8aa2520c9522029fc20aba61ce6c6aa32aec3b00519c95eb819e8
  ^^^^^^^^

forge exited with code 0

Domain hash: 0x1b6ca1022dcb8ee88e2ab8dd1adf6f6bfa6af586f8b074e99c952e6e3c6befad
Message hash: 0xd5c5183a56f8aa2520c9522029fc20aba61ce6c6aa32aec3b00519c95eb819e8

Data: 0x19011b6ca1022dcb8ee88e2ab8dd1adf6f6bfa6af586f8b074e99c952e6e3c6befadd5c5183a56f8aa2520c9522029fc20aba61ce6c6aa32aec3b00519c95eb819e8
Signer: 0x4A02DE0C8a1C74AB99D1eCeb56d1d5f54B8293b0
Signature: 36b6a15e3e86b1ae44bdfc9183c4d86b0eaead44c838530ecb2e43dd0618559579195d42fe63868a44ee0279feef0181b1a9ed3b0faa89bf1ebd48b0f48f54bc1c