op-txverify

op-txverify is a command-line utility for verifying Safe transactions. It helps users validate Safe multisig transactions by:

1. Parsing and presenting transactions in a clearly understandable manner
2. Identifying common addresses and contracts that users interact with
3. Simplifying access by allowing users to input transactions via QR codes

QR Code Scanning

The QR scanning functionality provided by op-txverify allows you to verify Safe transactions by scanning QR codes displayed on a web interface. This is especially useful for air-gapped verification where transmitting data to the verification device over bluetooth or USB is not desireable.

To use the QR code scanner:

1. Open https://op-txverify.optimism.io on your mobile device.
2. Paste the transaction hash or Safe UI link of the Safe transaction you want to verify.
3. Run the following command on your verification device:

   op-txverify qr

4. A browser window will automatically open with the QR scanner interface.
5. Display the QR codes on your mobile device to the QR scanner.
6. After successful scanning, op-txverify will verify the transaction and display the results.

Installation

Option 1: Download from Releases

1. Go to the Releases page
2. Download the appropriate binary for your operating system and architecture
3. Make the binary executable: chmod +x op-txverify_[version]_[os]_[arch]
4. Rename and move the binary to a location in your PATH:

   mv op-txverify_[version]_[os]_[arch] /usr/local/bin/op-txverify

Optional: Verify Checksum

To verify the integrity of your downloaded binary:

1. Download the op-txverify_[version]_SHA256SUMS file from the releases page
2. Run the verification command and compare with the corresponding entry in the SHA256SUMS file:

   sha256sum op-txverify_[version]_[os]_[arch]

3. Compare the two checksums to ensure they match

Option 2: Build from Source

Prerequisites:

• Go 1.23 or later
• Git
• GoReleaser

Steps:

1. Clone the repository:

   git clone https://github.com/ethereum-optimism/op-txverify.git
   cd op-txverify

2. Build using GoReleaser:

   goreleaser build --snapshot --clean

3. The binaries will be available in the dist directory with names like:

   dist/op-txverify_[version]_[os]_[arch]/op-txverify

4. Install the binary for your platform:

   chmod +x dist/op-txverify_[version]_[os]_[arch]/op-txverify
   mv dist/op-txverify_[version]_[os]_[arch]/op-txverify /usr/local/bin/

Compare Checksums (Optional)

To verify a downloaded binary against your local build:

1. Check the SHA256SUMS file generated in the dist directory:

   cat dist/op-txverify_[version]_SHA256SUMS

2. Calculate the checksum of your downloaded binary:

   sha256sum /path/to/downloaded/op-txverify_[version]_[os]_[arch]

3. Compare the two checksums to ensure they match