971 bug onchain functions related to userchannel does not work with viem signer

[akp111]

Fixes Issue

Changes proposed

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• My code follows the code style of this project.
• My change requires changes to the documentation.
• I have updated the documentation accordingly.
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• The title of my pull request is a short description of the requested changes.

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Note to reviewers

[github-actions]

File: packages/restapi/src/lib/pushNotification/pushNotificationBase.ts

1. In the import section, there are several imports that are not used:

   • Remove the following import: import { PushAPI } from '../pushapi/PushAPI';

2. In the PushNotificationBaseClass class:

   • The createChannel method is missing a closing brace } at the end.
   • Inside the createChannel method, there is a missing closing brace } after the throw new Error('viem signer is not provided'); line.
   • Inside the createChannel method, the createChannelPromise variable is not being used. Remove this line of code: const createChannelPromise = contract!['createChannelWithPUSH'](channelType, identityBytes, fees, this.getTimeBound(), { gasLimit: 1000000 });
   • Inside the createChannel method, change !contract.write to !pushSigner.isViemSigner(this.signer).
   • Inside the createChannel method, there is a missing closing brace } at the end of the catch block.
   • Inside the createChannel method, the createChannelRes variable is not being used. Remove this line of code: createChannelRes = createChannelTrx.hash;
   • Inside the createChannel method, the return statement is missing a closing parenthesis ). Add ) before the semicolon ; in the return statement.

3. In the updateChannel method:

   • The parameter let updateChannelRes; should be removed. The variable updateChannelRes is already declared inside the method.
   • Inside the updateChannel method, there is a missing closing parenthesis ) after the contract!['updateChannelMeta'](account line.
   • Inside the updateChannel method, the updateChannelPromise variable is not being used. Remove this line of code: const updateChannelPromise = contract!['updateChannelMeta'](account,.
   • Inside the updateChannel method, the return statement is missing a closing parenthesis ). Add ) before the semicolon ; in the return statement.

4. In the verifyChannel method:

   • The parameter let verifyTrxRes; should be removed. The variable verifyTrxRes is already declared inside the method.
   • Inside the verifyChannel method, there is a missing closing brace } before the throw statement throw new Error(error.message);.
   • Inside the verifyChannel method, there is an unnecessary throw new Error(error.message); statement. You can remove this line of code.

File: packages/restapi/tests/lib/notification/channel.test.ts

1. In the channel :: update section, there is a missing closing bracket } at the end of the test case.

2. In the channel :: create section, there is a missing closing bracket } at the end of the test case.

3. In the channel :: settings section, there is a missing closing bracket } at the end of the test case.

All looks good.