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Initialization Daemon

A Node.js application for monitoring the Livepeer protocol and initializing rounds.

Install

npm install

Running

cd initialization-daemon
node index.js --provider "<PROVIDER_URL>" --account "<ACCOUNT_ADDRESS>" --datadir "<DATA_DIR>"

You will be prompted for a password to unlock the account.

Options

  • --provider: The ETH RPC provider URL. Ex. https://arbitrum-mainnet.infura.io/v3/<API_SECRET>
  • --account: The ETH address that will submit round initialization transactions. The keystore file for the account needs to be in the directory specified by --datadir.
    • The library used for importing keys from keystore files requires the keystore file name to contain the account address. For example, if the address is 0xfoo, the keystore file name must contain foo (0x prefix stripped). If the keystore file name is blahblah-foo then it must be accessible at <DATA_DIR>/keystore/blahblah-foo The keystore files generated by geth have file names such as UTC--2018-08-06T18-32-59.279635944Z--foo.
  • --datadir: The directory that contains a keystore sub-directory that contains the keystore file for the address specified by --account.

Architecture

The high level architecture of the application consists of the following:

  • The user unlocks an account by entering a password.
  • The application polls for new blocks using the ETH RPC provider URL.
  • The application fetches the address of the RoundsManager protocol contract based on the chain ID of the network that the ETH RPC provider URL is connected to which should correspond to the RoundsManager proxy contract address specified in the docs.
  • For each new block, the application checks the RoundsManager to see if the current round is initialized.
  • If the current round is not initialized, the application uses the private key for the unlocked account to submit a round initialization transaction.