[draft] Add Optimism & OptimismKovan chains

[pyk]

Motivation

I want to add Optimism verification support for foundry, but it turns out foundry depends on this package and optimism is not supported yet. This PR add support for Optimism network.

More information about Optimism:

1. What is Optimism?
2. Optimism Networks and Public RPC Endpoints

Solution

There are two packages that need to be updated:

1. Core: Add chain types
2. Etherscan: add support for ETHERSCAN_API_KEY on optimism

PR Checklist

• Added Tests
• Added Documentation
• Updated the changelog

[mattsse]

lgtm

[pyk]

@mattsse @gakonst Ser, I'm sorry I marked this PR as a draft coz when I try to deploy contract via forge using this implementation it's failed due to error in gas estimation. So it's not ready yet.

This line

ethers-rs/ethers-providers/src/provider.rs

Line 437 in e24117a

.ok_or_else(|| ProviderError::CustomError("EIP-1559 not activated".into()))?;

It turns out that the JSON-RPC response from Optimism is a bit different.

Here is response from kovan

foundry-optimism on 🌱 master [✘?]
✦ curl https://kovan.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161 \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params": ["0x1B9ECBF",false],"id":1}' | jq
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2130  100  2044  100    86   1672     70  0:00:01  0:00:01 --:--:--  1753
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "author": "0x03801efb0efe2a25ede5dd3a003ae880c0292e4d",
    "baseFeePerGas": "0x7",
    "difficulty": "0xfffffffffffffffffffffffffffffffe",
    "extraData": "0xdb830303018c4f70656e457468657265756d86312e34372e30826c69",
    "gasLimit": "0x1c9c380",
    "gasUsed": "0x2f232",
    "hash": "0x77ee67b0539362891ec198b2c0956bcce7d233f38e0a945e14b138242b44eded",
    "logsBloom": "0x00000000000008000000000018000000000000400000000000000000008000000020000000800000000000000000000000000000000200000000000000000000100000000000000000000000002000001000000001000000000000000000800000000000000000000000000000000000400000000400000000000000100000000000200000000000000000000000000000000480000000000000000000000000000008001000000000000000000000000002000000000000000000000000000000000000000000040000000000200008000000000000000000000000000000000000000001000000000000000000000000000000000000020000000000000000",
    "miner": "0x03801efb0efe2a25ede5dd3a003ae880c0292e4d",
    "number": "0x1b9ecbf",
    "parentHash": "0xd3ad06ca887f081bf11c97e3c9f7e23c8a35da930098dfa3971f9c1c699d7d8d",
    "receiptsRoot": "0x12adb242ef50cb5450c49e4d85437979663f85a83867099af7bc6b1efd634ce0",
    "sealFields": [
      "0x8418721f1d",
      "0xb8419f7bc3ea952d5bc93064306f034493d6b485afbaf84ad88d7a41356d4b5bd49f3de5f1951ed5761427f4280bf0ad329c2a6752ee903c438918ecc27f1af8ecff00"
    ],
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "signature": "9f7bc3ea952d5bc93064306f034493d6b485afbaf84ad88d7a41356d4b5bd49f3de5f1951ed5761427f4280bf0ad329c2a6752ee903c438918ecc27f1af8ecff00",
    "size": "0x3ee",
    "stateRoot": "0xd9f3985dec744c9ecb29acf3a03b2f3071b1706be95b976142822ad986252855",
    "step": "410132253",
    "timestamp": "0x61c87c74",
    "totalDifficulty": "0x1b7a9b0000000000000000000000004822ae54d",
    "transactions": [
      "0x33c94e1de7f0d7ada758e2743d16ff9f969ab4b572340a443c3cd374062b7a90",
      "0x1cf55a97345cd3b6b09d83bf725b2d3a3b9fe3e980fb87358719b8bea53c8ff8",
      "0x82488b081252bb075a90779a44c30d98f1fb82768e0088446e47725f4beeb66e"
    ],
    "transactionsRoot": "0x6cb65ef738b55c7bd49f22d71a703751ddb2a7b1d50250755e6913a3626fc7b1",
    "uncles": []
  }
}

here is from optimism kovan:

foundry-optimism on 🌱 master [✘?]
✦ curl https://kovan.optimism.io \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params": ["0x2D87",false],"id":1}' | jq
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1757  100  1674  100    83   4588    227 --:--:-- --:--:-- --:--:--  4907
{
  "jsonrpc": "2.0",
  "result": {
    "difficulty": "0x2",
    "extraData": "0xd98301090a846765746889676f312e31352e3133856c696e757800000000000000900c3bfe9a04b7577748baa6498abd6f7edd2eecc007b5acb0d34458626aef78257e1cb9d03aaf11832a729f5bdbda4e5ba0b813eac980dbb78ebfee591b9d00",
    "gasLimit": "0xe4e1c0",
    "gasUsed": "0x2f9e5",
    "hash": "0x323e1caafc8529374f3f0df815b07a36f7218a75d3b8f5a17758eb79e398da31",
    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000800000000020200000000000000000000100004010000000100000000012000000000000001000000000000000000000000000000000000000000000000040200400000000400000000000000100000000010000000010000020000000000000000000480000000000000000000000000000000001000000000000000000004000000000000000000000080000000000000000000000000001000000000000008000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "miner": "0x0000000000000000000000000000000000000000",
    "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "nonce": "0x0000000000000000",
    "number": "0x2d87",
    "parentHash": "0xada07dac184dce34a07963b11bae1884d175c038812918bfb5b5b95b87fa5ff9",
    "receiptsRoot": "0x19b8f29cc262993a5241a691682c99345c8e863a106251b9d88e1698d1aea929",
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "size": "0x311",
    "stateRoot": "0x114f494f25e8120b38b2c0d2ac4e4b45726327b7fd2735d3c653dd8ff2fb649c",
    "timestamp": "0x617e8580",
    "totalDifficulty": "0x5b0f",
    "transactions": [
      "0x89e3281a30371aea2426c660ebef724b0e5e986bf9862de95975e9582463c5ac"
    ],
    "transactionsRoot": "0xbea45c7f3b6ea624c1d3f4ceef8b0b5d64ea7c771ae75034b6354ef6b63bd10b",
    "uncles": []
  },
  "id": 1
}

Notice that there is no baseFeePerGas field on Optimism.

If forge(1) use this, it will error like this:

foundry-optimism on 🌱 master [✘?]
✦ ./deploy-to-optimism-kovan.sh
compiling...
no files changed, compilation skippped.
Dec 26 21:40:13.205 ERROR forge: error=custom error: EIP-1559 not activated
Error:
   0: custom error: EIP-1559 not activated

Location:
   /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/result.rs:1914

Backtrace omitted.
Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.

[pyk]

It seems that I need to enable legacy trx when deploying to optimism:

ethers-rs/ethers-contract/src/factory.rs

Lines 164 to 179 in e24117a

	// create the tx object. Since we're deploying a contract, `to` is `None`
	// We default to EIP-1559 transactions, but the sender can convert it back
	// to a legacy one
	#[cfg(feature = "legacy")]
	let tx = TransactionRequest { to: None, data: Some(data), ..Default::default() };
	#[cfg(not(feature = "legacy"))]
	let tx = Eip1559TransactionRequest { to: None, data: Some(data), ..Default::default() };
	let tx = tx.into();
	Ok(Deployer {
	client: Arc::clone(&self.client), // cheap clone behind the arc
	abi: self.abi,
	tx,
	confs: 1,
	block: BlockNumber::Latest,
	})

[gakonst]

Yeah Optimism does not have 1559 enabled so you should use legacy indeed.