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https://github.com/miguelmota/consensys-zkevm-messenger-l2-to-l1-example
Send a message from L2 ConsenSys zkEVM testnet to L1 Goerli.
https://github.com/miguelmota/consensys-zkevm-messenger-l2-to-l1-example
bridge consensys consensys-zkevm cross-chain ethereum example hardhat messenger multi-chain smart-contract solidity tutorial zk zkevm
Last synced: 7 days ago
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Send a message from L2 ConsenSys zkEVM testnet to L1 Goerli.
- Host: GitHub
- URL: https://github.com/miguelmota/consensys-zkevm-messenger-l2-to-l1-example
- Owner: miguelmota
- License: mit
- Created: 2023-02-01T16:42:21.000Z (almost 2 years ago)
- Default Branch: master
- Last Pushed: 2023-03-08T03:41:41.000Z (almost 2 years ago)
- Last Synced: 2024-10-29T03:41:52.466Z (about 2 months ago)
- Topics: bridge, consensys, consensys-zkevm, cross-chain, ethereum, example, hardhat, messenger, multi-chain, smart-contract, solidity, tutorial, zk, zkevm
- Language: JavaScript
- Homepage: https://github.com/miguelmota/-consensys-zkevm-messenger-l2-to-l1-example
- Size: 168 KB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# ConsenSys zkEVM Messenger L2->L1 Example
> Send a message from L2 [ConsenSys zkEVM](https://docs.zkevm.consensys.net/) testnet to L1 Goerli.
## Example
There's two contracts; `L2Contract.sol` and `L1Contract.sol`
The L2 contract has a method `sendGreetingMessageToL1` that sends a message form L2 to L1 contract to set a greeting message on L1 contract.
It sends the encoded calldata to execute `setGreeting` on L1 which can only be called if the message was sent by the L2 contract.
### Files
- [`L2Contract.sol`](./contracts/L2Contract.sol)
- [`L1Contract.sol`](./contracts/L1Contract.sol)
- [`deployL2.js`](./script/deployL2.js)
- [`deployL1.js`](./scripts/deployL1.js)
- [`getRelayFee.js`](./scripts/getRelayFee.js)
- [`sendL2ToL1Message.js`](./scripts/sendL2ToL1Message.js)
- [`getGreetingOnL1.js`](./scripts/getGreetingOnL1.js)
## Install
```sh
git clone https://github.com/miguelmota/consensys-zkevm-messenger-l2-to-l1-example.git
cd consensys-zkevm-messenger-l2-to-l1-example
npm install
```
### Set Signer
Create `.env`
```sh
PRIVATE_KEY=123...
```
Make sure private key has funds on both ConsenSys zkEVM testnet and Goerli.
### Compile Contracts
```sh
npx hardhat compile
```
### Deploy L2 Contract
Command
```sh
npx hardhat run --network consensyszk scripts/deployL2.js
```
Output
```sh
L2Contract deployed to: 0x4A6a249Db5C65F4d87f0F962fa9a46cFC442293D
```
### Deploy L1 Contract
Command
```sh
L2_CONTRACT=0x4A6a249Db5C65F4d87f0F962fa9a46cFC442293D \
npx hardhat run --network goerli scripts/deployL1.js
```
Output
```sh
L1Contract deployed to: 0x29c514fA55a073EAE67Db285Bde984eB09BC4143
```
### Get Relay Fee
Command
```sh
npx hardhat run --network goerli scripts/getRelayFee.js
```
Output
```sh
fee: 0.01
```
### Send L2->L1 Message
Command (replace env vars with your values)
```sh
GREETING="hello world" \
L2_CONTRACT=0x4A6a249Db5C65F4d87f0F962fa9a46cFC442293D \
L1_CONTRACT=0x29c514fA55a073EAE67Db285Bde984eB09BC4143 \
npx hardhat run --network consensyszk scripts/sendL2ToL1Message.js
```
Output
```sh
sent tx hash 0xe118d29f573034da2bd5e30bf0b7e5c00af09d550a02e5e3854a82a9420d681d
https://explorer.goerli.zkevm.consensys.net/tx/0xe118d29f573034da2bd5e30bf0b7e5c00af09d550a02e5e3854a82a9420d681d
```
### Get Greeting on L1
Command
```sh
L1_CONTRACT=0x29c514fA55a073EAE67Db285Bde984eB09BC4143 \
npx hardhat run --network goerli scripts/getGreetingOnL1.js
```
Output
```sh
greeting: hello world
```
### Send L1->L2 Message
See [https://github.com/miguelmota/consensys-zkevm-messenger-l2-to-l1-example](https://github.com/miguelmota/consensys-zkevm-messenger-l2-to-l1-example)
## License
[MIT](./LICENSE) @ [Miguel Mota](https://github.com/miguelmota)