chore: add changelog doc and testnet Fermat height (#75)

* docs: add changelog doc

* add forkheight and update changelog

* update

* udpate

* Update CHANGELOG.md

Co-authored-by: Nolan <33241113+nolanxyg@users.noreply.github.com>

* update fork time

---------

Co-authored-by: Nolan <33241113+nolanxyg@users.noreply.github.com>

CHANGELOG.md

@@ -0,0 +1,48 @@
+# Changelog
+
+## v0.2.0
+
+This is a hardfork release for the opBNB Testnet called Fermat.
+It will be activated at block height 12113000, expected to occur on November 3, 2023, at 6 AM UTC.
+
+### User Facing Changes
+
+- The L1 gas price of all L2 transactions will be fixed(3 Gwei by default and 5 Gwei for Testnet).
+- Introduce a new type of RPC kind called `bsc_fullnode`. To enable it, include the parameter `--l1.rpckind=bsc_fullnode` if the layer 1 endpoint supports the `eth_getTransactionReceiptsByBlockNumber` API. This will significantly enhance the performance of retrieving L1 receipts (#63).
+- The rollup configuration for opBNB Mainnet and Testnet has been added to the code. You can now use the `--network=opBNBTestnet` or `--network=opBNBMainnet` flag instead of `--rollup.config=./rollup.json` to specify the rollup configuration for the op-node. (#65)
+-  Allow the addition of multiple L1 endpoints in the configuration. For example: `--l1=https://data-seed-prebsc-1-s1.binance.org:8545,https://data-seed-prebsc-2-s2.binance.org:8545,https://data-seed-prebsc-2-s3.binance.org:8545`. By default, it will use the first endpoint, and if it's unavailable, it will automatically switch to the next one (#55).
+- Enable the layer 2 sync mechanism for opBNB by adding `--l2.engine-sync=true` flag on the op-node. Additionally, a new flag l2.skip-sync-start-check is introduced to allow users to skip the sanity check of L1 origins for unsafe L2 blocks when determining the sync-starting point. (#62)
+
+### Partial Changelog
+
+- #55: feat(op-node/op-batcher/op-proposer): add fallbackClient
+- #57: feat(op-node): add pre fetch receipts logic
+- #62: feat: engine p2p sync feature
+- #63: feat(op-node): add rpcKind bsc_fullnode for eth_getTransactionReceiptsByBlockNumber
+- #64: fix(op-e2e): fallback to not use bsc specific method eth_getFinalizedBlock
+- #65: feat(op-node): update l1 gas price with fixed value
+- #66: feature(contracts-bedrock): add verify.ts for verifying any contract
+- #67: fix(op-node): eth_client replace eth_getFinalizedBlock to eth_getFinalizedHeader
+
+### Docker Images
+
+- ghcr.io/bnb-chain/op-node:v0.2.0
+- ghcr.io/bnb-chain/op-batcher:v0.2.0
+- ghcr.io/bnb-chain/op-proposer:v0.2.0
+
+### Full Changelog
+
+https://github.com/bnb-chain/opbnb/compare/v0.1.2...v0.2.0
+
+## v0.1.2
+
+This is the initial release for opBNB Testnet.
+
+The repo base is [optimism v1.1.0](https://github.com/ethereum-optimism/optimism/releases/tag/op-node%2Fv1.1.0).
+
+### Changelog
+
+1. [feat: support non-eip-1559 l1 & compatible for BSC](https://github.com/bnb-chain/opbnb/commit/2867cfac0a3b4a505e2cac73f7659b0bef5743e5)
+2. [feat: op-proposer propose currentL1Hash behavior config by AllowNonFinalizedFlag](https://github.com/bnb-chain/opbnb/commit/19602ccb037073301296875e3c4d4d9d97b8e99c)
+3. [feat: ResourceMetering.sol compatible with BSC](https://github.com/bnb-chain/opbnb/commit/2ce30b27b6c2352d330522b8397ed8f8ef72f1a8)
+4. [fix(op-batcher): solve race condition of BatchSubmitter](https://github.com/bnb-chain/opbnb/pull/5)

op-node/chaincfg/chains.go

@@ -130,8 +130,7 @@ var OPBNBTestnet = rollup.Config{
 	DepositContractAddress: common.HexToAddress("0x4386c8abf2009ac0c263462da568dd9d46e52a31"),
 	L1SystemConfigAddress:  common.HexToAddress("0x406ac857817708eaf4ca3a82317ef4ae3d1ea23b"),
 	RegolithTime:           u64Ptr(0),
-	// TODO update block number
-	Fermat: nil,
+	Fermat:                 big.NewInt(12113000), // Nov-03-2023 06 AM +UTC
 }
 
 var OPBNBDevnet = rollup.Config{