gasparax/review-reward-chainbridge

Multi-Chain rating system with Chainbridge

Thesis project to build a Restaurant review system on two polygon blockchian linked by Chainbridge.

Setup - Networks

Use the Polygon Edge documentation as support: https://wiki.polygon.technology/docs/edge/get-started/set-up-ibft-locally

git clone https://github.com/0xPolygon/polygon-edge.git
cd polygon-edge/
go build -o polygon-edge main.go
sudo mv polygon-edge /usr/local/bin

Create a folder to store the networks

mkdir networks

Create all the nodes of the first network

polygon-edge secrets init --data-dir network1/test-chain-1
#Output
[SECRETS INIT]
Public key (address) = 0xc7D7D3080d8a47815913df6b59BC28fbF6DD574B
BLS Public key       = 0xb28b2c0ede7dbc5d3adaf27c3cfeb4e5fbe49554a6a0aafec5b625785f658cf73b26468a2a1fde6c26a31e89a53df6ce
Node ID              = 16Uiu2HAmJiuSq5WMCh7xNcuXW6bQRQzhpH6F7vryY3zAXM63NCVx

Repeat this operation for at least 4 times. To create the connection string for specifying the bootnode, we will need to conform to the multiaddr format:

/ip4/<ip_address>/tcp/<port>/p2p/<node_id>

ip4/127.0.0.1/tcp/10001/p2p/16Uiu2HAmJiuSq5WMCh7xNcuXW6bQRQzhpH6F7vryY3zAXM63NCVx

Create the genesis file, give 1000 ETH to the first 2 nodes and set the block gas limit. In the network1 directory run:

polygon-edge genesis --pos --epoch-size 10000 --consensus ibft --ibft-validators-prefix-path test-chain- --bootnode /ip4/127.0.0.1/tcp/10001/p2p/16Uiu2HAmJiuSq5WMCh7xNcuXW6bQRQzhpH6F7vryY3zAXM63NCVx --premine=0xc7D7D3080d8a47815913df6b59BC28fbF6DD574B:1000000000000000000000 --premine=0xf9A3f7f1CCBA236DC62f5046e83Efc5ed1292752:1000000000000000000000 --block-gas-limit 100000000000000000

Run all the nodes

rm -r -rf test-chain-*/blockchain test-chain-*/trie && rm test-chain-*/consensus/metadata && rm test-chain-*/consensus/snapshots

for i in $(ls default-*.json); do (gnome-terminal --tab -- polygon-edge server --config $i &); done

For the second network Go in the networks directory and repeat the node creation phase:

polygon-edge secrets init --data-dir network2/test-chain-1

Create the genesis file, give 1000 ETH to the first 2 nodes and set the block gas limit. In the network2 directory run:

polygon-edge genesis --pos --epoch-size 10000 --consensus ibft --ibft-validators-prefix-path test-chain- --bootnode /ip4/127.0.0.1/tcp/20001/p2p/16Uiu2HAmTsrYAoxX5iCfGYi63C46K7Qn8uDeSYiixFos4pbwwh77 --premine=0xE065b939F18CB5f83F36EFf9E1F9E370055A07C1:1000000000000000000000 --premine=0x19398539F279E97028FcfF5A05698270a2dD4182:1000000000000000000000 --block-gas-limit 100000000000000000

Run all the nodes

rm -r -rf test-chain-*/blockchain test-chain-*/trie && rm test-chain-*/consensus/metadata && rm test-chain-*/consensus/snapshots

for i in $(ls default-*.json); do (gnome-terminal --tab -- polygon-edge server --config $i &); done

Deploy the Chainbridge and the system contracts

‼️ IMPORTANT ‼️

Update the file "templateConstants.js" and rename it in "constants.js"

After the constats.js file update follow the next instructions.

To deploy the Chainbridge infratructure on the first chain:

npm run deploy:poe1

To deploy the Chainbridge infratructure on the second chain:

npm run deploy:poe2

To deploy the restaurant contracts on both chains:

npm run deploy

To test a full cycle Pay-Permission and then Review-Reward run:

npm run test:full

Setup - Relayers

Intall NodeJS and npm.

Install Go:

wget https://golang.org/dl/go1.19.4.linux-amd64.tar.gz
sudo tar -C /usr/local -xvf go1.19.4.linux-amd64.tar.gz
#set paths in your environment
sudo nano ~/.bashrc
#at the and of the file add
export PATH=$PATH:/usr/local/go/bin
#check the installation
go verision

Clone the Chainbridge-example repository:

git clone https://github.com/ChainSafe/chainbridge-core-example

Go in the cloned repository and build the executable file:

cd chainbridge-core-example/
make build

Create the keystore file for each relyer:

./chainbridge-core-example evm-cli accounts import --private-key "<relayer 1 private key>" --password "<password>"
mv <address.key> keys/

Create a configuration file in JSON and save the file in the config folder:

{
  "relayer": {},
  "chains": [
    {
      "name": "network1",
      "type": "evm",
      "id": 1,
      "endpoint": "RPC-ENDPOINT of the network",
      "from": "Relayer address",
      "bridge": "Bridge smart contract address",
      "erc20Handler": "ERC20 Handler smart contract address",
      "gasLimit": 9000000,
      "maxGasPrice": 2000000000,
      "blockConfirmations": 10
    },
    {
      "name": "network2",
      "type": "evm",
      "id": 2,
      "endpoint": "RPC-ENDPOINT of the network",
      "from": "Relayer address",
      "bridge": "Bridge smart contract addressb",
      "erc20Handler": "ERC20 Handler smart contract address",
      "gasLimit": 9000000,
      "maxGasPrice": 20000000000,
      "blockConfirmations": 10
    }
  ]
}