# README

Gamechain Oracle

The code is mostly based on loomchain's Oracle. The upstream is Plasmachain which runs multiple Ethereum contracts using loomchain binary. The downstream is Gamechain which is a Go contracts.

The idea of this Oracle is to fetch all the events related to open pack and sycn to Gamechain. Ideally, we should have all of our cards we open on loom.games to Gamehchain to actually play the Zombie Battleground.

ABI

To fetch data from Plasmachain we need contract's abi to generate ethcontracts. Currently the only contract that is called when we open a pack is CardFaucet. The event generated from this contract is called GeneratedCard.

run this to generate ehtcontract

make oracle-abigen

Also, there is loomchainbackend which is a client for theh ethcontract. Some of the methods are not implemented yet because we don't use them. Please make sure you implement it if needed.

Latest Plasma Block Number

We need to set latest plasma block number using zb-cli so that the oracle can start from the block where we already have the contract deployed. If not set, it will poll the data from block number 1

# start from block 200
./bin/zb-cli -k priv set_last_plasma_block_num -n 200