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Supports MegaETH For L2EP (#4499)
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‎.changeset/many-houses-sin.md‎

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---
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'@chainlink/layer2-sequencer-health-adapter': minor
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---
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Supports MegaETH for L2EP

‎packages/sources/layer2-sequencer-health/README.md‎

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@@ -63,16 +63,20 @@ Adapter that checks the Layer 2 Sequencer status
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| | `XLAYER_HEALTH_ENDPOINT` | xLayer Health Endpoint | | |
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| | `XLAYER_CHAIN_ID` | The chain id to connect to xLayer | | 196 |
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| | `XLAYER_DELTA` | Maximum time in milliseconds from last seen block to consider Celo sequencer healthy | | 120000 (2 min) |
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| | `MEGAETH_RPC_ENDPOINT` | MegaETH RPC Endpoint | | https://mainnet.megaeth.com/rpc |
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| | `MEGAETH_HEALTH_ENDPOINT` | MegaETH Health Endpoint | | |
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| | `MEGAETH_CHAIN_ID` | The chain id to connect to MegaETH | | 4326 |
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| | `MEGAETH_DELTA` | Maximum time in milliseconds from last seen block to consider MegaETH sequencer healthy | | 120000 (2 min) |
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For the adapter to be useful on the desired network, at least one endpoint (RPC or HEALTH) needs to provided
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---
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### Input Parameters
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| Required? | Name | Description | Options | Defaults to |
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| :-------: | :-----: | :----------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------: | :---------: |
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| ✅ | network | Layer 2 Network to check | `arbitrum`, `optimism`, `base`, `linea`, `metis`, `scroll`, `starkware`, `zksync`, `ink`, `mantle`, `unichain`, `soneium`, `celo`, `xlayer` | |
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| Required? | Name | Description | Options | Defaults to |
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| :-------: | :-----: | :----------------------: | :----------------------------------------------------------------------------------------------------------------------------------------------------: | :---------: |
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| ✅ | network | Layer 2 Network to check | `arbitrum`, `optimism`, `base`, `linea`, `metis`, `scroll`, `starkware`, `zksync`, `ink`, `mantle`, `unichain`, `soneium`, `celo`, `xlayer`, `megaeth` | |
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---
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‎packages/sources/layer2-sequencer-health/schemas/env.json‎

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"description": "The blockchain id to connect to",
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"type": "string",
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"default": "196"
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},
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"MEGAETH_RPC_ENDPOINT": {
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"type": "string",
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"default": "https://mainnet.megaeth.com/rpc"
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},
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"MEGAETH_HEALTH_ENDPOINT": {
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"type": "string",
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"default": ""
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},
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"MEGAETH_CHAIN_ID": {
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"required": false,
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"description": "The blockchain id to connect to",
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"type": "string",
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"default": "4326"
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}
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},
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"allOf": [

‎packages/sources/layer2-sequencer-health/src/config/index.ts‎

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@@ -42,6 +42,7 @@ export const ENV_UNICHAIN_RPC_ENDPOINT = 'UNICHAIN_RPC_ENDPOINT'
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export const ENV_SONEIUM_RPC_ENDPOINT = 'SONEIUM_RPC_ENDPOINT'
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export const ENV_CELO_RPC_ENDPOINT = 'CELO_RPC_ENDPOINT'
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export const ENV_XLAYER_RPC_ENDPOINT = 'XLAYER_RPC_ENDPOINT'
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export const ENV_MEGAETH_RPC_ENDPOINT = 'MEGAETH_RPC_ENDPOINT'
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export const ENV_ARBITRUM_CHAIN_ID = 'ARBITRUM_CHAIN_ID'
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export const ENV_OPTIMISM_CHAIN_ID = 'OPTIMISM_CHAIN_ID'
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export const ENV_SONEIUM_CHAIN_ID = 'SONEIUM_CHAIN_ID'
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export const ENV_CELO_CHAIN_ID = 'CELO_CHAIN_ID'
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export const ENV_XLAYER_CHAIN_ID = 'XLAYER_CHAIN_ID'
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export const ENV_MEGAETH_CHAIN_ID = 'MEGAETH_CHAIN_ID'
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export const DEFAULT_ARBITRUM_CHAIN_ID = '42161'
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export const DEFAULT_OPTIMISM_CHAIN_ID = '10'
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export const DEFAULT_SONEIUM_CHAIN_ID = '1868'
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export const DEFAULT_CELO_CHAIN_ID = '42220'
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export const DEFAULT_XLAYER_CHAIN_ID = '196'
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export const DEFAULT_MEGAETH_CHAIN_ID = '4326'
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export enum Networks {
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Arbitrum = 'arbitrum',
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Soneium = 'soneium',
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Celo = 'celo',
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Xlayer = 'xlayer',
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Megaeth = 'megaeth',
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}
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export type EVMNetworks = Exclude<Networks, Networks.Starkware>
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const DEFAULT_SONEIUM_RPC_ENDPOINT = 'https://rpc.soneium.org'
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const DEFAULT_CELO_RPC_ENDPOINT = 'https://forno.celo.org'
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const DEFAULT_XLAYER_RPC_ENDPOINT = 'https://xlayerrpc.okx.com'
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const DEFAULT_MEGAETH_RPC_ENDPOINT = 'https://mainnet.megaeth.com/rpc'
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export const RPC_ENDPOINTS: Record<EVMNetworks, string | undefined> = {
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[Networks.Arbitrum]: util.getEnv(ENV_ARBITRUM_RPC_ENDPOINT) || DEFAULT_ARBITRUM_RPC_ENDPOINT,
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[Networks.Soneium]: util.getEnv(ENV_SONEIUM_RPC_ENDPOINT) || DEFAULT_SONEIUM_RPC_ENDPOINT,
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[Networks.Celo]: util.getEnv(ENV_CELO_RPC_ENDPOINT) || DEFAULT_CELO_RPC_ENDPOINT,
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[Networks.Xlayer]: util.getEnv(ENV_XLAYER_RPC_ENDPOINT) || DEFAULT_XLAYER_RPC_ENDPOINT,
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[Networks.Megaeth]: util.getEnv(ENV_MEGAETH_RPC_ENDPOINT) || DEFAULT_MEGAETH_RPC_ENDPOINT,
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}
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export const CHAIN_IDS: Record<EVMNetworks, number | undefined | string> = {
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[Networks.Xlayer]:
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parseInt(util.getEnv(ENV_XLAYER_CHAIN_ID) || DEFAULT_XLAYER_CHAIN_ID) ||
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util.getEnv(ENV_XLAYER_CHAIN_ID),
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[Networks.Megaeth]:
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parseInt(util.getEnv(ENV_MEGAETH_CHAIN_ID) || DEFAULT_MEGAETH_CHAIN_ID) ||
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util.getEnv(ENV_MEGAETH_CHAIN_ID),
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}
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export const CHAIN_DELTA: Record<Networks, number> = {
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[Networks.Soneium]: Number(util.getEnv('SONEIUM_DELTA')) || DEFAULT_DELTA_TIME,
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[Networks.Celo]: Number(util.getEnv('CELO_DELTA')) || DEFAULT_DELTA_TIME,
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[Networks.Xlayer]: Number(util.getEnv('XLAYER_DELTA')) || DEFAULT_DELTA_TIME,
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[Networks.Megaeth]: Number(util.getEnv('MEGAETH_DELTA')) || DEFAULT_DELTA_TIME,
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}
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const DEFAULT_METIS_HEALTH_ENDPOINT = 'https://andromeda-healthy.metisdevops.link/health'
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responsePath: [],
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processResponse: () => undefined,
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},
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[Networks.Megaeth]: {
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endpoint: util.getEnv('MEGAETH_HEALTH_ENDPOINT'),
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responsePath: [],
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processResponse: () => undefined,
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},
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}
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const defaultProcessResponse = (data: unknown, network: Networks) =>

‎packages/sources/layer2-sequencer-health/src/endpoint/health.ts‎

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[Networks.Soneium]: false,
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[Networks.Celo]: false,
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[Networks.Xlayer]: false,
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[Networks.Megaeth]: false,
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}
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export type TInputParameters = {
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Networks.Soneium,
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Networks.Celo,
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Networks.Xlayer,
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Networks.Megaeth,
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],
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},
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requireTxFailure: {

‎packages/sources/layer2-sequencer-health/src/evm.ts‎

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gasPrice: 0,
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to: wallet.address,
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},
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[Networks.Megaeth]: {
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value: 0,
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gasLimit: 0,
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gasPrice: 0,
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to: wallet.address,
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},
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}
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await race<ethers.providers.TransactionResponse>({
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timeout,
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block: 0,
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timestamp: 0,
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},
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[Networks.Megaeth]: {
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block: 0,
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timestamp: 0,
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},
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}
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export const checkOptimisticRollupBlockHeight = (

‎packages/sources/layer2-sequencer-health/src/network.ts‎

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[Networks.Soneium]: ['intrinsic gas too low: gas 0'],
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[Networks.Celo]: ['intrinsic gas too low'],
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[Networks.Xlayer]: ['intrinsic gas too low'],
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[Networks.Megaeth]: ['intrinsic gas too low'],
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}
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export interface NetworkHealthCheck {
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[Networks.Soneium]: ['error', 'message'],
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[Networks.Celo]: ['error', 'message'],
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[Networks.Xlayer]: ['error', 'message'],
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[Networks.Megaeth]: ['error', 'message'],
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}
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return (Requester.getResult(error, paths[network]) as string) || ''
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}

‎packages/sources/layer2-sequencer-health/test/integration/__snapshots__/onchainFailKnown.test.ts.snap‎

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}
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`;
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exports[`execute megaeth network should return failure if tx not required 1`] = `
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{
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"data": {
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"result": 1,
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},
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"jobRunID": "1",
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"result": 1,
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"statusCode": 200,
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}
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`;
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exports[`execute megaeth network should return success when transaction submission is known 1`] = `
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{
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"data": {
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"result": 0,
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},
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"jobRunID": "1",
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"result": 0,
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"statusCode": 200,
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}
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`;
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exports[`execute metis network should return failure if tx not required 1`] = `
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{
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"data": {

‎packages/sources/layer2-sequencer-health/test/integration/__snapshots__/onchainFailUnknown.test.ts.snap‎

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}
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exports[`execute megaeth network should return failure when transaction submission is unknown 1`] = `
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{
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"data": {
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"result": 1,
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},
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"jobRunID": "1",
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"result": 1,
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"statusCode": 200,
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}
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`;
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exports[`execute metis network should return failure when transaction submission is unknown 1`] = `
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{
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"data": {

‎packages/sources/layer2-sequencer-health/test/integration/__snapshots__/onchainSuccess.test.ts.snap‎

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}
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`;
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exports[`execute megaeth network should return failure if tx not required even if it would be successful 1`] = `
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{
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"data": {
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"result": 1,
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},
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"jobRunID": "1",
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"result": 1,
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"statusCode": 200,
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}
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`;
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exports[`execute megaeth network should return success when all methods succeed 1`] = `
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{
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"data": {
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"result": 0,
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},
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"jobRunID": "1",
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"result": 0,
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"statusCode": 200,
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}
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`;
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exports[`execute megaeth network should return transaction submission is successful 1`] = `
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{
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"data": {
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"result": 0,
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},
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"jobRunID": "1",
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"result": 0,
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"statusCode": 200,
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}
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`;
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exports[`execute metis network should return failure if tx not required even if it would be successful 1`] = `
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{
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"data": {

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