feat: fetch native token information

src/lib/dataEntities/networks.ts

@@ -24,6 +24,7 @@ import { ArbSdkError } from '../dataEntities/errors'
 import { ARB1_NITRO_GENESIS_L2_BLOCK } from './constants'
 import { RollupAdminLogic__factory } from '../abi/factories/RollupAdminLogic__factory'
 import { Prettify } from '../utils/types'
+import { IERC20Bridge__factory } from '../abi/factories/IERC20Bridge__factory'
 
 /**
  * Represents an Arbitrum chain, e.g. Arbitrum One, Arbitrum Sepolia, or an L3 chain.
@@ -341,6 +342,17 @@ async function getArbitrumNetworkBySignerOrProvider(
   return getArbitrumNetworkByChainId(chainId)
 }
 
+async function getNativeToken(
+  bridge: string,
+  provider: Provider
+): Promise<string> {
+  try {
+    return await IERC20Bridge__factory.connect(bridge, provider).nativeToken()
+  } catch (err) {
+    return constants.AddressZero
+  }
+}
+
 /**
  * Returns all Arbitrum networks registered in the SDK, both default and custom.
  */
@@ -350,7 +362,7 @@ export function getArbitrumNetworks(): ArbitrumNetwork[] {
 
 export type ArbitrumNetworkInformationFromRollup = Pick<
   ArbitrumNetwork,
-  'parentChainId' | 'confirmPeriodBlocks' | 'ethBridge'
+  'parentChainId' | 'confirmPeriodBlocks' | 'ethBridge' | 'nativeToken'
 >
 
 /**
@@ -389,6 +401,7 @@ export async function getArbitrumNetworkInformationFromRollup(
       outbox,
       rollup: rollupAddress,
     },
+    nativeToken: await getNativeToken(bridge, parentProvider),
   }
 }
 

tests/integration/getArbitrumNetworkInformationFromRollup.test.ts

@@ -1,21 +1,23 @@
 import dotenv from 'dotenv'
 import { JsonRpcProvider } from '@ethersproject/providers'
+import { constants } from 'ethers'
 import { expect } from 'chai'
+
 import {
   getArbitrumNetwork,
   getArbitrumNetworkInformationFromRollup,
 } from '../../src/lib/dataEntities/networks'
 
 dotenv.config()
 
-describe('getArbitrumNetworkInformationFromRollup.test', () => {
+describe('getArbitrumNetworkInformationFromRollup', () => {
   it('fetches information about arbitrum one', async () => {
-    const arb1 = await getArbitrumNetwork(42161)
+    const arb1 = getArbitrumNetwork(42161)
     const ethProvider = new JsonRpcProvider(
       process.env['MAINNET_RPC'] as string
     )
 
-    const { parentChainId, confirmPeriodBlocks, ethBridge } =
+    const { parentChainId, confirmPeriodBlocks, ethBridge, nativeToken } =
       await getArbitrumNetworkInformationFromRollup(
         arb1.ethBridge.rollup,
         ethProvider
@@ -39,5 +41,45 @@ describe('getArbitrumNetworkInformationFromRollup.test', () => {
     )
     expect(outbox, 'Outbox contract is not correct').to.eq(arb1EthBridge.outbox)
     expect(rollup, 'Rollup contract is not correct').to.eq(arb1EthBridge.rollup)
+
+    expect(nativeToken, 'Native token is not correct').to.eq(
+      constants.AddressZero
+    )
+  })
+
+  it('fetches information about xai', async () => {
+    const { parentChainId, confirmPeriodBlocks, ethBridge, nativeToken } =
+      await getArbitrumNetworkInformationFromRollup(
+        '0xC47DacFbAa80Bd9D8112F4e8069482c2A3221336',
+        new JsonRpcProvider('https://arb1.arbitrum.io/rpc')
+      )
+
+    expect(parentChainId, 'parentChainId is not correct').to.eq(42161)
+
+    expect(confirmPeriodBlocks, 'confirmPeriodBlocks is not correct').to.eq(
+      45818
+    )
+
+    const { bridge, inbox, sequencerInbox, outbox, rollup } = ethBridge
+
+    expect(bridge, 'Bridge contract is not correct').to.eq(
+      '0x7dd8A76bdAeBE3BBBaCD7Aa87f1D4FDa1E60f94f'
+    )
+    expect(inbox, 'Inbox contract is not correct').to.eq(
+      '0xaE21fDA3de92dE2FDAF606233b2863782Ba046F9'
+    )
+    expect(sequencerInbox, 'SequencerInbox contract is not correct').to.eq(
+      '0x995a9d3ca121D48d21087eDE20bc8acb2398c8B1'
+    )
+    expect(outbox, 'Outbox contract is not correct').to.eq(
+      '0x1E400568AD4840dbE50FB32f306B842e9ddeF726'
+    )
+    expect(rollup, 'Rollup contract is not correct').to.eq(
+      '0xC47DacFbAa80Bd9D8112F4e8069482c2A3221336'
+    )
+
+    expect(nativeToken, 'Native token is not correct').to.eq(
+      '0x4Cb9a7AE498CEDcBb5EAe9f25736aE7d428C9D66'
+    )
   })
 })