smartcontractkit · mohamed-mehany · Nov 18, 2024 · Nov 18, 2024
diff --git a/.changeset/healthy-windows-chew.md b/.changeset/healthy-windows-chew.md
@@ -0,0 +1,5 @@
+---
+'@chainlink/layer2-sequencer-health-adapter': minor
+---
+
+Adds L2EP support for Linea chain
diff --git a/packages/sources/layer2-sequencer-health/README.md b/packages/sources/layer2-sequencer-health/README.md
@@ -19,6 +19,10 @@ Adapter that checks the Layer 2 Sequencer status
 |           |      `BASE_HEALTH_ENDPOINT`       |                                   Base Health Endpoint                                    |         |                                                                  |
 |           |          `BASE_CHAIN_ID`          |                              The chain id to connect to Base                              |         |                               8453                               |
 |           |           `BASE_DELTA`            |   Maximum time in milliseconds from last seen block to consider Base sequencer healthy    |         |                          120000 (2 min)                          |
+|           |       `LINEA_RPC_ENDPOINT`        |                                    Linea RPC Endpoint                                     |         |                     https://rpc.linea.build                      |
+|           |      `LINEA_HEALTH_ENDPOINT`      |                                   Linea Health Endpoint                                   |         |                                                                  |
+|           |         `LINEA_CHAIN_ID`          |                             The chain id to connect to Linea                              |         |                              59144                               |
+|           |           `LINEA_DELTA`           |   Maximum time in milliseconds from last seen block to consider Linea sequencer healthy   |         |                          120000 (2 min)                          |
 |           |       `METIS_RPC_ENDPOINT`        |                                    Metis RPC Endpoint                                     |         |              https://andromeda.metis.io/?owner=1088              |
 |           |      `METIS_HEALTH_ENDPOINT`      |                                   Metis Health Endpoint                                   |         |        https://andromeda-healthy.metisdevops.link/health         |
 |           |         `METIS_CHAIN_ID`          |                             The chain id to connect to Metis                              |         |                               1088                               |
@@ -42,9 +46,9 @@ For the adapter to be useful on the desired network, at least one endpoint (RPC
 
 ### Input Parameters
 
-| Required? |  Name   |       Description        |                                 Options                                  | Defaults to |
-| :-------: | :-----: | :----------------------: | :----------------------------------------------------------------------: | :---------: |
-|    ✅     | network | Layer 2 Network to check | `arbitrum`, `optimism`, `base`, `metis`, `scroll`, `starkware`, `zksync` |             |
+| Required? |  Name   |       Description        |                                      Options                                      | Defaults to |
+| :-------: | :-----: | :----------------------: | :-------------------------------------------------------------------------------: | :---------: |
+|    ✅     | network | Layer 2 Network to check | `arbitrum`, `optimism`, `base`, `linea`, `metis`, `scroll`, `starkware`, `zksync` |             |
 
 ---
 

diff --git a/packages/sources/layer2-sequencer-health/schemas/env.json b/packages/sources/layer2-sequencer-health/schemas/env.json
@@ -16,6 +16,10 @@
       "type": "number",
       "default": 120000
     },
+    "LINEA_DELTA": {
+      "type": "number",
+      "default": 120000
+    },
     "METIS_DELTA": {
       "type": "number",
       "default": 600000
@@ -74,6 +78,20 @@
       "type": "string",
       "default": "8453"
     },
+    "LINEA_RPC_ENDPOINT": {
+      "type": "string",
+      "default": "https://rpc.linea.build"
+    },
+    "LINEA_HEALTH_ENDPOINT": {
+      "type": "string",
+      "default": ""
+    },
+    "LINEA_CHAIN_ID": {
+      "required": false,
+      "description": "The blockchain id to connect to",
+      "type": "string",
+      "default": "59144"
+    },
     "METIS_RPC_ENDPOINT": {
       "type": "string",
       "default": "https://andromeda.metis.io/?owner=1088"

diff --git a/packages/sources/layer2-sequencer-health/src/config/index.ts b/packages/sources/layer2-sequencer-health/src/config/index.ts
@@ -27,20 +27,23 @@ export const DEFAULT_RETRY_INTERVAL = 5 * 100
 export const ENV_ARBITRUM_RPC_ENDPOINT = 'ARBITRUM_RPC_ENDPOINT'
 export const ENV_OPTIMISM_RPC_ENDPOINT = 'OPTIMISM_RPC_ENDPOINT'
 export const ENV_BASE_RPC_ENDPOINT = 'BASE_RPC_ENDPOINT'
+export const ENV_LINEA_RPC_ENDPOINT = 'LINEA_RPC_ENDPOINT'
 export const ENV_METIS_RPC_ENDPOINT = 'METIS_RPC_ENDPOINT'
 export const ENV_SCROLL_RPC_ENDPOINT = 'SCROLL_RPC_ENDPOINT'
 export const ENV_ZKSYNC_RPC_ENDPOINT = 'ZKSYNC_RPC_ENDPOINT'
 
 export const ENV_ARBITRUM_CHAIN_ID = 'ARBITRUM_CHAIN_ID'
 export const ENV_OPTIMISM_CHAIN_ID = 'OPTIMISM_CHAIN_ID'
 export const ENV_BASE_CHAIN_ID = 'BASE_CHAIN_ID'
+export const ENV_LINEA_CHAIN_ID = 'BASE_CHAIN_ID'
 export const ENV_METIS_CHAIN_ID = 'METIS_CHAIN_ID'
 export const ENV_SCROLL_CHAIN_ID = 'SCROLL_CHAIN_ID'
 export const ENV_ZKSYNC_CHAIN_ID = 'ZKSYNC_CHAIN_ID'
 
 export const DEFAULT_ARBITRUM_CHAIN_ID = '42161'
 export const DEFAULT_OPTIMISM_CHAIN_ID = '10'
 export const DEFAULT_BASE_CHAIN_ID = '8453'
+export const DEFAULT_LINEA_CHAIN_ID = '59144'
 export const DEFAULT_METIS_CHAIN_ID = '1088'
 export const DEFAULT_SCROLL_CHAIN_ID = '534352'
 export const DEFAULT_ZKSYNC_CHAIN_ID = '324'
@@ -49,6 +52,7 @@ export enum Networks {
   Arbitrum = 'arbitrum',
   Optimism = 'optimism',
   Base = 'base',
+  Linea = 'linea',
   Metis = 'metis',
   Scroll = 'scroll',
   Starkware = 'starkware',
@@ -60,6 +64,7 @@ export type EVMNetworks = Exclude<Networks, Networks.Starkware>
 const DEFAULT_ARBITRUM_RPC_ENDPOINT = 'https://arb1.arbitrum.io/rpc'
 const DEFAULT_OPTIMISM_RPC_ENDPOINT = 'https://mainnet.optimism.io'
 const DEFAULT_BASE_RPC_ENDPOINT = 'https://mainnet.base.org'
+const DEFAULT_LINEA_RPC_ENDPOINT = 'https://rpc.linea.build'
 const DEFAULT_METIS_RPC_ENDPOINT = 'https://andromeda.metis.io/?owner=1088'
 const DEFAULT_SCROLL_RPC_ENDPOINT = 'https://rpc.scroll.io'
 const DEFAULT_ZKSYNC_RPC_ENDPOINT = 'https://mainnet.era.zksync.io'
@@ -68,6 +73,7 @@ export const RPC_ENDPOINTS: Record<EVMNetworks, string | undefined> = {
   [Networks.Arbitrum]: util.getEnv(ENV_ARBITRUM_RPC_ENDPOINT) || DEFAULT_ARBITRUM_RPC_ENDPOINT,
   [Networks.Optimism]: util.getEnv(ENV_OPTIMISM_RPC_ENDPOINT) || DEFAULT_OPTIMISM_RPC_ENDPOINT,
   [Networks.Base]: util.getEnv(ENV_BASE_RPC_ENDPOINT) || DEFAULT_BASE_RPC_ENDPOINT,
+  [Networks.Linea]: util.getEnv(ENV_LINEA_RPC_ENDPOINT) || DEFAULT_LINEA_RPC_ENDPOINT,
   [Networks.Metis]: util.getEnv(ENV_METIS_RPC_ENDPOINT) || DEFAULT_METIS_RPC_ENDPOINT,
   [Networks.Scroll]: util.getEnv(ENV_SCROLL_RPC_ENDPOINT) || DEFAULT_SCROLL_RPC_ENDPOINT,
   [Networks.zkSync]: util.getEnv(ENV_ZKSYNC_RPC_ENDPOINT) || DEFAULT_ZKSYNC_RPC_ENDPOINT,
@@ -83,6 +89,9 @@ export const CHAIN_IDS: Record<EVMNetworks, number | undefined | string> = {
   [Networks.Base]:
     parseInt(util.getEnv(ENV_BASE_CHAIN_ID) || DEFAULT_BASE_CHAIN_ID) ||
     util.getEnv(ENV_BASE_CHAIN_ID),
+  [Networks.Linea]:
+    parseInt(util.getEnv(ENV_LINEA_CHAIN_ID) || DEFAULT_LINEA_CHAIN_ID) ||
+    util.getEnv(ENV_LINEA_CHAIN_ID),
   [Networks.Metis]:
     parseInt(util.getEnv(ENV_METIS_CHAIN_ID) || DEFAULT_METIS_CHAIN_ID) ||
     util.getEnv(ENV_METIS_CHAIN_ID),
@@ -98,6 +107,7 @@ export const CHAIN_DELTA: Record<Networks, number> = {
   [Networks.Arbitrum]: Number(util.getEnv('ARBITRUM_DELTA')) || DEFAULT_DELTA_TIME,
   [Networks.Optimism]: Number(util.getEnv('OPTIMISM_DELTA')) || DEFAULT_DELTA_TIME,
   [Networks.Base]: Number(util.getEnv('BASE_DELTA')) || DEFAULT_DELTA_TIME,
+  [Networks.Linea]: Number(util.getEnv('LINEA_DELTA')) || DEFAULT_DELTA_TIME,
   [Networks.Metis]: Number(util.getEnv('METIS_DELTA')) || DEFAULT_DELTA_TIME_METIS,
   [Networks.Scroll]: Number(util.getEnv('SCROLL_DELTA')) || DEFAULT_DELTA_TIME,
   [Networks.Starkware]: Number(util.getEnv('STARKWARE_DELTA')) || DEFAULT_DELTA_TIME,
@@ -132,6 +142,11 @@ export const HEALTH_ENDPOINTS: HeathEndpoints = {
     responsePath: [],
     processResponse: () => undefined,
   },
+  [Networks.Linea]: {
+    endpoint: util.getEnv('LINEA_HEALTH_ENDPOINT'),
+    responsePath: [],
+    processResponse: () => undefined,
+  },
   [Networks.Metis]: {
     endpoint: util.getEnv('METIS_HEALTH_ENDPOINT') || DEFAULT_METIS_HEALTH_ENDPOINT,
     responsePath: ['healthy'],

diff --git a/packages/sources/layer2-sequencer-health/src/endpoint/health.ts b/packages/sources/layer2-sequencer-health/src/endpoint/health.ts
@@ -19,6 +19,7 @@ export const supportedEndpoints = ['health']
 const defaultRequireTxFailure = {
   [Networks.Arbitrum]: false,
   [Networks.Base]: false,
+  [Networks.Linea]: false,
   [Networks.Metis]: false,
   [Networks.Optimism]: false,
   [Networks.Scroll]: false,
@@ -36,6 +37,7 @@ export const inputParameters: InputParameters<TInputParameters> = {
     options: [
       Networks.Arbitrum,
       Networks.Base,
+      Networks.Linea,
       Networks.Metis,
       Networks.Optimism,
       Networks.Scroll,

diff --git a/packages/sources/layer2-sequencer-health/src/evm.ts b/packages/sources/layer2-sequencer-health/src/evm.ts
@@ -45,6 +45,12 @@ export const sendEVMDummyTransaction = async (
       gasPrice: 0,
       to: wallet.address,
     },
+    [Networks.Linea]: {
+      value: 0,
+      gasLimit: 0,
+      gasPrice: 0,
+      to: wallet.address,
+    },
     [Networks.Metis]: {
       value: 0,
       gasLimit: 0,
@@ -84,6 +90,10 @@ const lastSeenBlock: Record<EVMNetworks, { block: number; timestamp: number }> =
     block: 0,
     timestamp: 0,
   },
+  [Networks.Linea]: {
+    block: 0,
+    timestamp: 0,
+  },
   [Networks.Metis]: {
     block: 0,
     timestamp: 0,

diff --git a/packages/sources/layer2-sequencer-health/src/network.ts b/packages/sources/layer2-sequencer-health/src/network.ts
@@ -16,6 +16,7 @@ const sequencerOnlineErrors: Record<Networks, string[]> = {
   // TODO: Optimism error needs to be confirmed by their team
   [Networks.Optimism]: ['cannot accept 0 gas price transaction'],
   [Networks.Base]: ['transaction underpriced'],
+  [Networks.Linea]: ['Gas price below configured minimum gas price'],
   [Networks.Metis]: ['cannot accept 0 gas price transaction'],
   [Networks.Scroll]: ['invalid transaction: insufficient funds for l1fee + gas * price + value'],
   // Sending an empty transaction to the dummy Starknet address should return one
@@ -88,6 +89,7 @@ const isExpectedErrorMessage = (network: Networks, error: Error) => {
       [Networks.Arbitrum]: ['error', 'message'],
       [Networks.Optimism]: ['error', 'message'],
       [Networks.Base]: ['error', 'message'],
+      [Networks.Linea]: ['error', 'message'],
       [Networks.Metis]: ['error', 'message'],
       [Networks.Scroll]: ['error', 'error', 'message'],
       [Networks.Starkware]: ['message'],

diff --git a/...rces/layer2-sequencer-health/test/integration/__snapshots__/onchainFailKnown.test.ts.snap b/...rces/layer2-sequencer-health/test/integration/__snapshots__/onchainFailKnown.test.ts.snap
@@ -1,5 +1,27 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`execute Linea network should return failure if tx not required 1`] = `
+{
+  "data": {
+    "result": 1,
+  },
+  "jobRunID": "1",
+  "result": 1,
+  "statusCode": 200,
+}
+`;
+
+exports[`execute Linea network should return success when transaction submission is known 1`] = `
+{
+  "data": {
+    "result": 0,
+  },
+  "jobRunID": "1",
+  "result": 0,
+  "statusCode": 200,
+}
+`;
+
 exports[`execute arbitrum network should return failure if tx not required 1`] = `
 {
   "data": {

diff --git a/...ources/layer2-sequencer-health/test/integration/__snapshots__/onchainSuccess.test.ts.snap b/...ources/layer2-sequencer-health/test/integration/__snapshots__/onchainSuccess.test.ts.snap
@@ -1,5 +1,38 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`execute Linea network should return failure if tx not required even if it would be successful 1`] = `
+{
+  "data": {
+    "result": 1,
+  },
+  "jobRunID": "1",
+  "result": 1,
+  "statusCode": 200,
+}
+`;
+
+exports[`execute Linea network should return success when all methods succeed 1`] = `
+{
+  "data": {
+    "result": 0,
+  },
+  "jobRunID": "1",
+  "result": 0,
+  "statusCode": 200,
+}
+`;
+
+exports[`execute Linea network should return transaction submission is successful 1`] = `
+{
+  "data": {
+    "result": 0,
+  },
+  "jobRunID": "1",
+  "result": 0,
+  "statusCode": 200,
+}
+`;
+
 exports[`execute arbitrum network should return failure if tx not required even if it would be successful 1`] = `
 {
   "data": {

diff --git a/packages/sources/layer2-sequencer-health/test/integration/fixtures.ts b/packages/sources/layer2-sequencer-health/test/integration/fixtures.ts
@@ -72,6 +72,19 @@ export const mockResponseSuccessBlock = (): void => {
       'Origin',
     ])
 
+  nock('https://rpc.linea.build')
+    .post('/', { jsonrpc: '2.0', method: 'eth_blockNumber', params: [], id: /^\d+$/ })
+    .reply(200, () => ({ jsonrpc: '2.0', id: 1, result: '0x42d293' }), [
+      'Content-Type',
+      'application/json',
+      'Connection',
+      'close',
+      'Vary',
+      'Accept-Encoding',
+      'Vary',
+      'Origin',
+    ])
+
   nock('https://andromeda.metis.io/')
     .post('/', { jsonrpc: '2.0', method: 'eth_blockNumber', params: [], id: /^\d+$/ })
     .query({ owner: 1088 })
@@ -190,6 +203,19 @@ export const mockResponseFailureBlock = (): void => {
       'Origin',
     ])
 
+  nock('https://rpc.linea.build')
+    .post('/', { jsonrpc: '2.0', method: 'eth_blockNumber', params: [], id: /^\d+$/ })
+    .reply(200, () => ({ jsonrpc: '2.0', id: 1, result: '0x00' }), [
+      'Content-Type',
+      'application/json',
+      'Connection',
+      'close',
+      'Vary',
+      'Accept-Encoding',
+      'Vary',
+      'Origin',
+    ])
+
   nock('https://andromeda.metis.io')
     .post('/', { jsonrpc: '2.0', method: 'eth_blockNumber', params: [], id: /^\d+$/ })
     .query({ owner: 1088 })

diff --git a/packages/sources/layer2-sequencer-health/test/integration/onchainFailKnown.test.ts b/packages/sources/layer2-sequencer-health/test/integration/onchainFailKnown.test.ts
@@ -10,6 +10,7 @@ const mockMessages = {
   'https://arb1.arbitrum.io/rpc': 'gas price too low',
   'https://mainnet.optimism.io': 'cannot accept 0 gas price transaction',
   'https://mainnet.base.org': 'transaction underpriced',
+  'https://rpc.linea.build': 'Gas price below configured minimum gas price',
   'https://andromeda.metis.io/?owner=1088': 'cannot accept 0 gas price transaction',
   'https://rpc.scroll.io':
     'invalid transaction: insufficient funds for l1fee + gas * price + value',
@@ -157,6 +158,35 @@ describe('execute', () => {
     })
   })
 
+  describe('Linea network', () => {
+    it('should return success when transaction submission is known', async () => {
+      mockResponseFailureBlock()
+
+      const data: AdapterRequest = {
+        id,
+        data: {
+          network: 'linea',
+          requireTxFailure: true,
+        },
+      }
+
+      await sendRequestAndExpectStatus(data, 0)
+    })
+
+    it('should return failure if tx not required', async () => {
+      mockResponseFailureBlock()
+
+      const data: AdapterRequest = {
+        id,
+        data: {
+          network: 'linea',
+        },
+      }
+
+      await sendRequestAndExpectStatus(data, 1)
+    })
+  })
+
   describe('metis network', () => {
     it('should return success when transaction submission is known', async () => {
       mockResponseFailureHealth()

diff --git a/packages/sources/layer2-sequencer-health/test/integration/onchainSuccess.test.ts b/packages/sources/layer2-sequencer-health/test/integration/onchainSuccess.test.ts
@@ -336,6 +336,52 @@ describe('execute', () => {
     })
   })
 
+  describe('Linea network', () => {
+    it('should return success when all methods succeed', async () => {
+      mockResponseSuccessBlock()
+      mockResponseSuccessHealth()
+
+      const data: AdapterRequest = {
+        id,
+        data: {
+          network: 'linea',
+        },
+      }
+
+      await sendRequestAndExpectStatus(data, 0)
+    })
+
+    it('should return transaction submission is successful', async () => {
+      mockResponseFailureBlock()
+      mockResponseSuccessHealth()
+
+      const data: AdapterRequest = {
+        id,
+        data: {
+          network: 'linea',
+          requireTxFailure: true,
+        },
+      }
+
+      await sendRequestAndExpectStatus(data, 0)
+    })
+
+    it('should return failure if tx not required even if it would be successful', async () => {
+      mockResponseFailureBlock()
+      mockResponseFailureHealth()
+
+      const data: AdapterRequest = {
+        id,
+        data: {
+          network: 'linea',
+          requireTxFailure: false,
+        },
+      }
+
+      await sendRequestAndExpectStatus(data, 1)
+    })
+  })
+
   describe('metis network', () => {
     it('should return success when all methods succeed', async () => {
       mockResponseSuccessHealth()