proven-indexer

The Proven Indexer watches the Ethereum blockchain transaction logs for new depositions that need verification.

Process overview:

• watches the transaction log for DepositionPublished events on the Proven contract
• fetches the IPFS payload locally and pins it so it doesn't disappear
• extracts EXIF metadata from the payload
• records each event in a local database

Prerequisites

• exiftool (sudo apt-get install libimage-exiftool-perl)
• mongodb (sudo apt-get install mongodb)
• nvm (curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.1/install.sh | bash)
• nvm install node

Development

$> npm install
$> export DEV_CHAIN_ROOT=`pwd`/dev_chain
$> chmod 400 dev_chain/etc/coinbase_password

Running

Set up `config/config.json` based on `config/config.sample.json`
$> export NODE_ENV=development
$> node index.js

Tests

$> npm test

Cucumber Specs

$> npm run spec