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https://github.com/miguelmota/polygon-zkevm-messenger-l2-to-l1-example
Send a message from L2 Polygon zkEVM testnet to L1 Goerli.
https://github.com/miguelmota/polygon-zkevm-messenger-l2-to-l1-example
bridge cross-chain ethereum example hardhat messenger multi-chain polygon polygon-zkevm smart-contract solidity tutorial zk zkevm
Last synced: 26 days ago
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Send a message from L2 Polygon zkEVM testnet to L1 Goerli.
- Host: GitHub
- URL: https://github.com/miguelmota/polygon-zkevm-messenger-l2-to-l1-example
- Owner: miguelmota
- License: mit
- Created: 2023-04-11T09:47:41.000Z (over 1 year ago)
- Default Branch: master
- Last Pushed: 2023-07-13T02:51:10.000Z (over 1 year ago)
- Last Synced: 2024-10-04T18:23:32.466Z (about 1 month ago)
- Topics: bridge, cross-chain, ethereum, example, hardhat, messenger, multi-chain, polygon, polygon-zkevm, smart-contract, solidity, tutorial, zk, zkevm
- Language: JavaScript
- Homepage: https://github.com/miguelmota/polygon-zkevm-messenger-l2-to-l1-example
- Size: 169 KB
- Stars: 8
- Watchers: 2
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Polygon zkEVM Messenger L2->L1 Example
> Send a message from L2 [Polygon zkEVM](https://polygon.technology/polygon-zkevm) 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)
- [`sendL2ToL1Message.js`](./scripts/sendL2ToL1Message.js)
- [`waitForInclusion.js`](./scripts/waitForInclusion.js)
- [`finalizeMessageOnL1.js`](./scripts/finalizeMessageOnL1.js)
- [`getGreetingOnL1.js`](./scripts/getGreetingOnL1.js)
## Install
```sh
git clone https://github.com/miguelmota/polygon-zkevm-messenger-l2-to-l1-example.git
cd polygon-zkevm-messenger-l2-to-l1-example
npm install
```
### Set Signer
Create `.env`
```sh
PRIVATE_KEY=123...
```
Make sure private key has funds on both Polygon zkEVM testnet and Goerli.
### Compile Contracts
```sh
npx hardhat compile
```
### Deploy L2 Contract
Command
```sh
npx hardhat run --network polygonzkevm scripts/deployL2.js
```
Output
```sh
L2Contract deployed to: 0x8Da765bB3F8fbcae3647Fc326D1F7d3337a5882A
```
### Deploy L1 Contract
Command
```sh
L2_CONTRACT=0x8Da765bB3F8fbcae3647Fc326D1F7d3337a5882A \
npx hardhat run --network goerli scripts/deployL1.js
```
Output
```sh
L1Contract deployed to: 0xd7f8d5a683D51fF90Aff7C25430CA3abAe3F80A0
```
### Send L2->L1 Message
Command (replace env vars with your values)
```sh
GREETING="hello world" \
L2_CONTRACT=0x8Da765bB3F8fbcae3647Fc326D1F7d3337a5882A \
L1_CONTRACT=0xd7f8d5a683D51fF90Aff7C25430CA3abAe3F80A0 \
npx hardhat run --network polygonzkevm scripts/sendL2ToL1Message.js
```
Output
```sh
sent tx hash 0x0085f32974b2b847bacb829f9006d89248cc6e53e3fb86f45cc348d94542ca22
https://testnet-zkevm.polygonscan.com/tx/0x0085f32974b2b847bacb829f9006d89248cc6e53e3fb86f45cc348d94542ca22
```
### Wait for L1 Root Inclusion
Command
```sh
L2_TX_HASH=0x0085f32974b2b847bacb829f9006d89248cc6e53e3fb86f45cc348d94542ca22 \
L1_CONTRACT=0xd7f8d5a683D51fF90Aff7C25430CA3abAe3F80A0 \
npx hardhat run --network polygonzkevm scripts/waitForInclusion.js
```
Output
```sh
Waiting for L1 root inclusion (this may take up to 60 minutes)...
{
"leaf_type": 1,
"orig_net": 1,
"orig_addr": "0x8Da765bB3F8fbcae3647Fc326D1F7d3337a5882A",
"amount": "0",
"dest_net": 0,
"dest_addr": "0xd7f8d5a683D51fF90Aff7C25430CA3abAe3F80A0",
"block_num": "569430",
"deposit_cnt": "23516",
"network_id": 1,
"tx_hash": "0x0085f32974b2b847bacb829f9006d89248cc6e53e3fb86f45cc348d94542ca22",
"claim_tx_hash": "",
"metadata": "0xa41368620000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000b68656c6c6f20776f726c64000000000000000000000000000000000000000000",
"ready_for_claim": true
}
Ready to finalize message
```
### Finalize Message On L1
Command
```sh
L2_TX_HASH=0x0085f32974b2b847bacb829f9006d89248cc6e53e3fb86f45cc348d94542ca22 \
L1_CONTRACT=0xd7f8d5a683D51fF90Aff7C25430CA3abAe3F80A0 \
L2_CONTRACT=0x8Da765bB3F8fbcae3647Fc326D1F7d3337a5882A \
npx hardhat run --network goerli scripts/finalizeMessageOnL1.js
```
Output
```sh
sent tx hash 0xcaae7ee9dd1f8657a21f4598a4c8a9e97cd1341ddf1ca988ad371641bc3993af
https://goerli.etherscan.io/tx/0xcaae7ee9dd1f8657a21f4598a4c8a9e97cd1341ddf1ca988ad371641bc3993af
```
### Get Greeting on L1
Command
```sh
L1_CONTRACT=0xd7f8d5a683D51fF90Aff7C25430CA3abAe3F80A0 \
npx hardhat run --network goerli scripts/getGreetingOnL1.js
```
Output
```sh
greeting: hello world
```
### Send L1->L2 Message
See [https://github.com/miguelmota/polygon-zkevm-messenger-l1-to-l2-example](https://github.com/miguelmota/polygon-zkevm-messenger-l1-to-l2-example)
## License
[MIT](./LICENSE) @ [Miguel Mota](https://github.com/miguelmota)