Merge pull request #6053 from ethereum-optimism/willc/multiwithdraw-no-test

fix(sdk): Fix multicall3 support for sdk

.changeset/cuddly-panthers-trade.md

+---
+'@eth-optimism/sdk': minor
+---
+
+Add support for claiming multicall3 withdrawals

packages/sdk/test/cross-chain-messenger.spec.ts

@@ -565,23 +565,25 @@ describe('CrossChainMessenger', () => {
       })
 
       describe('when the transaction sent more than one message', () => {
-        it('should throw an error', async () => {
+        it('should be able to get second message by passing in an idex', async () => {
           const messages = [...Array(2)].map(() => {
             return DUMMY_MESSAGE
           })
 
           const tx = await l1Messenger.triggerSentMessageEvents(messages)
-          await expect(messenger.toCrossChainMessage(tx)).to.be.rejectedWith(
-            'expected 1 message, got 2'
+          const foundCrossChainMessages =
+            await messenger.getMessagesByTransaction(tx)
+          expect(await messenger.toCrossChainMessage(tx, 1)).to.deep.eq(
+            foundCrossChainMessages[1]
           )
         })
       })
 
       describe('when the transaction sent no messages', () => {
-        it('should throw an error', async () => {
+        it('should throw an out of bounds error', async () => {
           const tx = await l1Messenger.triggerSentMessageEvents([])
           await expect(messenger.toCrossChainMessage(tx)).to.be.rejectedWith(
-            'expected 1 message, got 0'
+            `withdrawal index 0 out of bounds. There are 0 withdrawals`
           )
         })
       })