Add fetch customer data

README.md

@@ -96,6 +96,14 @@ The signature is valid for a few days.
 const loginSignature = await nemeosCustomerClient.requestLoginSignature()
 ```
 
+### Fetch customer data
+
+Fetch the customer data associated with the wallet address.
+
+```ts
+const customerData = await nemeosCustomerClient.fetchCustomerData(loginSignature)
+```
+
 #### Register email
 
 Register the wallet to an email address. This is used to send email notifications and reminders to customers about their loans.

src/NemeosBackendClient.ts

@@ -20,6 +20,15 @@ export class NemeosBackendClient {
     }
   }
 
+  public static async fetchCustomerData(borrowerAddress: string, loginSignature: NemeosLoginSignature): Promise<CustomerData> {
+    return NemeosBackendClient.ofetchClient(`/customerData/${borrowerAddress}`, {
+      headers: {
+        'X-Login-Signed-Message': loginSignature.message,
+        'X-Login-Signed-Signature': loginSignature.signature,
+      },
+    }).catch(extractHttpErrorMessageThenThrow)
+  }
+
   public static async setCustomerDataEmail(borrowerAddress: string, loginSignature: NemeosLoginSignature, email: string): Promise<void> {
     return NemeosBackendClient.ofetchClient(`/customerData/${borrowerAddress}/email`, {
       method: 'PUT',
@@ -66,6 +75,14 @@ export type NemeosLoginSignature = {
   signature: string
 }
 
+export type CustomerData = {
+  /** Borrower address */
+  borrower: string
+
+  email?: string
+  web3EmailProtectedData?: string
+}
+
 export type NftStartLoanData = {
   customerBuyNftParameters: {
     /** ID of the NFT */

src/NemeosSDK.ts

@@ -1,5 +1,5 @@
 import * as ethers from 'ethers'
-import { NemeosBackendClient, NemeosLoginSignature } from './NemeosBackendClient.js'
+import { NemeosBackendClient, NemeosLoginSignature, CustomerData } from './NemeosBackendClient.js'
 import { assertValidHexAddress, NemeosSDKError } from './utils.js'
 
 const NEMEOS_POOL_HUMAN_ABI = [
@@ -40,10 +40,23 @@ class NemeosCustomerClient {
    */
   public async requestLoginSignature(): Promise<NemeosLoginSignature> {
     const borrowerAddress = await this.signer.getAddress()
+
     console.log(`[nemeos][generateLoginSignature] Requesting wallet signature for borrowerAddress=${borrowerAddress}`)
     return NemeosBackendClient.generateLoginSignature(this.signer)
   }
 
+  /**
+   * Fetch the customer data associated with the wallet address.
+   *
+   * @param loginSignature Signature to ensure that the customer is the owner of the wallet
+   */
+  public async fetchCustomerData(loginSignature: NemeosLoginSignature): Promise<CustomerData> {
+    const borrowerAddress = await this.signer.getAddress()
+
+    console.log(`[nemeos][fetchCustomerData] Fetching customer data for borrowerAddress=${borrowerAddress}`)
+    return NemeosBackendClient.fetchCustomerData(borrowerAddress, loginSignature)
+  }
+
   /**
    * Register the wallet to an email address. This is used to send email notifications and reminders to customers about their loans.
    *
@@ -66,6 +79,8 @@ class NemeosCustomerClient {
    * Unregister the wallet from its associated email address. The customer will no longer receive email notifications and reminders.
    *
    * This will remove the email address from the Nemeos backend database.
+   *
+   * @param loginSignature Signature to ensure that the customer is the owner of the wallet
    */
   public async unregisterEmail(loginSignature: NemeosLoginSignature): Promise<void> {
     const borrowerAddress = await this.signer.getAddress()

tests/test.mjs

@@ -28,8 +28,16 @@ async function main() {
 
   const loginSignature = await nemeosCustomerClient.requestLoginSignature()
   console.log('loginSignature:', loginSignature)
+
+  await nemeosCustomerClient.unregisterEmail(loginSignature)
+
+  const customerDataBeforeEmailRegistration = await nemeosCustomerClient.fetchCustomerData(loginSignature)
+  console.log('customerData before email registration:', customerDataBeforeEmailRegistration)
+
   await nemeosCustomerClient.registerEmail(loginSignature, '[email protected]')
-  // await nemeosCustomerClient.unregisterEmail(loginSignature)
+
+  const customerDataAfterEmailRegistration = await nemeosCustomerClient.fetchCustomerData(loginSignature)
+  console.log('customerData after email registration:', customerDataAfterEmailRegistration)
 
   //
   // NemeosPoolClient