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https://github.com/miguelmota/polygon-zkevm-messenger-l1-to-l2-example
Send a message from L1 Goerli to L2 Polygon zkEVM testnet.
https://github.com/miguelmota/polygon-zkevm-messenger-l1-to-l2-example
bridge cross-chain ethereum example hardhat messenger multi-chain polygon polygon-zkevm smart-contract solidity tutorial zk zkevm
Last synced: about 2 months ago
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Send a message from L1 Goerli to L2 Polygon zkEVM testnet.
- Host: GitHub
- URL: https://github.com/miguelmota/polygon-zkevm-messenger-l1-to-l2-example
- Owner: miguelmota
- License: mit
- Created: 2023-04-11T09:26:01.000Z (over 1 year ago)
- Default Branch: master
- Last Pushed: 2023-07-13T02:47:43.000Z (over 1 year ago)
- Last Synced: 2024-10-06T23:21:27.362Z (3 months 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-l1-to-l2-example
- Size: 172 KB
- Stars: 4
- Watchers: 2
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Polygon zkEVM Messenger L1->L2 Example
> Send a message from L1 Goerli to L2 [Polygon zkEVM](https://polygon.technology/polygon-zkevm) testnet.
## Example
There's two contracts; `L2Contract.sol` and `L1Contract.sol`
The L1 contract has a method `sendMessageToL2` that sends a message from L1 to L2 contract to set a greeting message on L2 contract.
It sends the encoded calldata to execute `setGreeting` on L2 which can only be called if the message was sent by the L1 contract.
### Files
- [`L2Contract.sol`](./contracts/L2Contract.sol)
- [`L1Contract.sol`](./contracts/L1Contract.sol)
- [`deployL2.js`](./script/deployL2.js)
- [`deployL1.js`](./scripts/deployL1.js)
- [`sendL1ToL2Message.js`](./scripts/sendL1ToL2Message.js)
- [`waitForInclusion.js`](./scripts/waitForInclusion.js)
- [`finalizeMessageOnL2.js`](./scripts/finalizeMessageOnL2.js)
- [`getGreetingOnL2.js`](./scripts/getGreetingOnL2.js)
## Install
```sh
git clone https://github.com/miguelmota/polygon-zkevm-messenger-l1-to-l2-example.git
cd polygon-zkevm-messenger-l1-to-l2-example
npm install
```
### Set Signer
Create `.env`
```sh
PRIVATE_KEY=123...
```
Make sure private key has funds on both Goerli and Polygon zkEVM testnet.
### Compile Contracts
```sh
npx hardhat compile
```
### Deploy L1 Contract
Command
```sh
npx hardhat run --network goerli scripts/deployL1.js
```
Output
```sh
L1Contract deployed to: 0xF20b8Fd13c48b68d1820cFd6d0D531a383b1AAaD
```
### Deploy L2 Contract
Command
```sh
L1_CONTRACT=0xF20b8Fd13c48b68d1820cFd6d0D531a383b1AAaD \
npx hardhat run --network polygonzkevm scripts/deployL2.js
```
Output
```sh
L2Contract deployed to: 0x7aEF554acf5fBaCd2161027F24528f33fc7fCA95
```
### Send L1->L2 Message
Command (replace env vars with your values)
```sh
GREETING="hello world" \
L1_CONTRACT=0xF20b8Fd13c48b68d1820cFd6d0D531a383b1AAaD \
L2_CONTRACT=0x7aEF554acf5fBaCd2161027F24528f33fc7fCA95 \
npx hardhat run --network goerli scripts/sendL1ToL2Message.js
```
Output
```sh
sent tx hash 0xdc954d46caa59e41710a70a4a5b0204fdb3f9f7aae983179a3ee6bfb82ad19bc
https://goerli.etherscan.io/tx/0xdc954d46caa59e41710a70a4a5b0204fdb3f9f7aae983179a3ee6bfb82ad19bc
```
### Wait for L2 Root Inclusion
Command
```sh
L1_TX_HASH=0xdc954d46caa59e41710a70a4a5b0204fdb3f9f7aae983179a3ee6bfb82ad19bc \
L2_CONTRACT=0x7aEF554acf5fBaCd2161027F24528f33fc7fCA95 \
npx hardhat run --network polygonzkevm scripts/waitForInclusion.js
```
Output
```sh
Waiting for L2 root inclusion (this may take up to 20 minutes)...
{
"leaf_type": 1,
"orig_net": 0,
"orig_addr": "0xF20b8Fd13c48b68d1820cFd6d0D531a383b1AAaD",
"amount": "0",
"dest_net": 1,
"dest_addr": "0x7aEF554acf5fBaCd2161027F24528f33fc7fCA95",
"block_num": "8811178",
"deposit_cnt": "82717",
"network_id": 0,
"tx_hash": "0xdc954d46caa59e41710a70a4a5b0204fdb3f9f7aae983179a3ee6bfb82ad19bc",
"claim_tx_hash": "",
"metadata": "0xa41368620000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000b68656c6c6f20776f726c64000000000000000000000000000000000000000000",
"ready_for_claim": true
}
Ready to finalize message
```
### Finalize Message On L2
Command
```sh
L1_TX_HASH=0xdc954d46caa59e41710a70a4a5b0204fdb3f9f7aae983179a3ee6bfb82ad19bc \
L1_CONTRACT=0xF20b8Fd13c48b68d1820cFd6d0D531a383b1AAaD \
L2_CONTRACT=0x7aEF554acf5fBaCd2161027F24528f33fc7fCA95 \
npx hardhat run --network polygonzkevm scripts/finalizeMessageOnL2.js
```
Output
```sh
verified: true
sent tx hash 0xc98c79f95131148057d79411d55521b145f5c5cbf63df909539dbe589605ab63
https://testnet-zkevm.polygonscan.com/tx/0xc98c79f95131148057d79411d55521b145f5c5cbf63df909539dbe589605ab63
```
### Get Greeting on L2
Command
```sh
L2_CONTRACT=0x7aEF554acf5fBaCd2161027F24528f33fc7fCA95 \
npx hardhat run --network polygonzkevm scripts/getGreetingOnL2.js
```
Output
```sh
greeting: hello world
```
### Send L2->L1 Message
See [https://github.com/miguelmota/polygon-zkevm-messenger-l2-to-l1-example](https://github.com/miguelmota/polygon-zkevm-messenger-l2-to-l1-example)
## License
[MIT](./LICENSE) @ [Miguel Mota](https://github.com/miguelmota)