Add checkVerificationStatus to Etherscan Verifier

apps/contract-verification/src/app/Verifiers/AbstractVerifier.ts

@@ -1,5 +1,9 @@
 import { CompilerAbstract } from '@remix-project/remix-solidity'
-import { SubmittedContract, VerificationResponse } from '../types/VerificationTypes'
+import { SubmittedContract, VerificationResponse, VerificationStatus } from '../types/VerificationTypes'
+
+export interface AbstractVerifier {
+  checkVerificationStatus?(receiptId: string): Promise<VerificationStatus>
+}
 
 export abstract class AbstractVerifier {
   apiUrl: string

apps/contract-verification/src/app/Verifiers/EtherscanVerifier.ts

@@ -1,6 +1,6 @@
 import { CompilerAbstract } from '@remix-project/remix-solidity'
 import { AbstractVerifier } from './AbstractVerifier'
-import { SubmittedContract, VerificationResponse } from '../types/VerificationTypes'
+import { SubmittedContract, VerificationResponse, VerificationStatus } from '../types/VerificationTypes'
 
 interface EtherscanVerificationRequest {
   chainId?: string
@@ -18,6 +18,12 @@ interface EtherscanVerificationResponse {
   result: string
 }
 
+interface EtherscanCheckStatusResponse {
+  status: '0' | '1'
+  message: string
+  result: 'Pending in queue' | 'Pass - Verified' | 'Fail - Unable to verify' | 'Unknown UID'
+}
+
 export class EtherscanVerifier extends AbstractVerifier {
   apiKey?: string
 
@@ -59,7 +65,7 @@ export class EtherscanVerifier extends AbstractVerifier {
 
     if (!response.ok) {
       const responseText = await response.text()
-      console.error('Error on Etherscan API verification at ' + this.apiUrl + '\nStatus: ' + response.status + '\nResponse: ' + (responseText))
+      console.error('Error on Etherscan API verification at ' + this.apiUrl + '\nStatus: ' + response.status + '\nResponse: ' + responseText)
       throw new Error(responseText)
     }
 
@@ -73,7 +79,54 @@ export class EtherscanVerifier extends AbstractVerifier {
     return { status: 'pending', receiptId: verificationResponse.result }
   }
 
+  // TODO retry with backoff in case this throws error
+  async checkVerificationStatus(receiptId: string): Promise<VerificationStatus> {
+    const url = new URL('api', this.apiUrl)
+    url.searchParams.append('module', 'contract')
+    url.searchParams.append('action', 'checkverifystatus')
+    url.searchParams.append('guid', receiptId)
+    if (this.apiKey) {
+      url.searchParams.append('apikey', this.apiKey)
+    }
+
+    const response = await fetch(url.href, {
+      method: 'GET',
+    })
+
+    if (!response.ok) {
+      const responseText = await response.text()
+      console.error('Error on Etherscan API check verification status at ' + this.apiUrl + '\nStatus: ' + response.status + '\nResponse: ' + responseText)
+      throw new Error(responseText)
+    }
+
+    const checkStatusResponse: EtherscanCheckStatusResponse = await response.json()
+
+    if (checkStatusResponse.status !== '1' || !checkStatusResponse.message.startsWith('OK')) {
+      console.error('Error on Etherscan API check verification status at ' + this.apiUrl + '\nStatus: ' + checkStatusResponse.status + '\nMessage: ' + checkStatusResponse.message + '\nResult: ' + checkStatusResponse.result)
+      throw new Error(checkStatusResponse.result)
+    }
+
+    if (checkStatusResponse.result === 'Unknown UID') {
+      console.error('Error on Etherscan API check verification status at ' + this.apiUrl + '\nStatus: ' + checkStatusResponse.status + '\nMessage: ' + checkStatusResponse.message + '\nResult: ' + checkStatusResponse.result)
+      throw new Error(checkStatusResponse.result)
+    }
+
+    let status = 'unknown'
+    if (checkStatusResponse.result === 'Fail - Unable to verify') {
+      status = 'failed'
+    }
+    if (checkStatusResponse.result === 'Pending in queue') {
+      status = 'pending'
+    }
+    if (checkStatusResponse.result === 'Pass - Verified') {
+      status = 'verified'
+    }
+
+    return status
+  }
+
   async lookup(): Promise<any> {
+    // TODO type
     // Implement the lookup logic here
     console.log('Etherscan lookup started')
     // Placeholder logic for lookup

apps/contract-verification/src/app/types/VerificationTypes.ts

@@ -32,7 +32,7 @@ export interface VerifierInfo {
 export interface VerificationReceipt {
   receiptId?: string
   verifierInfo: VerifierInfo
-  status: string | 'error' | 'pending' | null
+  status: VerificationStatus | null
   message?: string
 }
 
@@ -68,7 +68,9 @@ export function isContract(contract: SubmittedContract | SubmittedProxyContract)
   return contract.type === 'contract'
 }
 
+export type VerificationStatus = string | 'error' | 'pending'
+
 export interface VerificationResponse {
-  status: string | 'pending'
+  status: VerificationStatus
   receiptId: string | null
 }