monitor

monitor

monitor is a prototype for an ethereum oracle. It can perform the following functions:

• run as a regular node in the ethereum network, in light client mode
• have the ability to call functions on a specific contract
• be able to listen for and pickup (custom) events on a specific contract

building

Run go build in this directory

code

The contract.go file is generated from the example contract using the abigen tool. A deployed contract is available on the Rinkeby testnet. The prototype is configured to use this contract.

Running

The prototype runs in light mode. The first time it is run, it will take a while for the chain to fully sync (seemingly roughly an hour). An account is expected to run this example. One can be created using the default geth binary, and then imported. To import an account, pass the --account.json $ACCOUNTFILE flag. This will import the account into the oracles keystore. You must also use the --account.pass $ACCOUNTPASS flag with the password which was used to encrypt the account. After the first time, the account remains loaded (unless the keystore dir is removed/cleared), and only the password needs to be provided.

The prototype will print information about any transaction it picks up being run on the contract.

If the --trasnferTo $HEXADDR is given, the prototype will try to send 10 tokens to this address. Note that this means that your account needs at least 10 of the given ERC20 tokens + an amount of eth to pay the gas fee.