docs: Remove payment section and add getBalance() for payment networks documentation

packages/docs/docs/guides/5-request-client/2-erc20-payment-detection.ts

@@ -104,35 +104,6 @@ const proxyContractCreateParams = {
   console.log(`Request created with erc20 proxy contract payment network: ${request.requestId}`);
 })();
 
-/**
- * ### Paying an erc20 proxy contract request with Request payment processor
- * 
- * Requests using ERC20 proxy contract payment network can be paid with the Request payment processor, in order to simplify interactions with the involved smart contracts
- */
-
- // Import necessary packages
- import { hasSufficientFunds, payRequest } from '@requestnetwork/payment-processor';
- import { Wallet } from 'ethers';
-
- // Create a wallet for the payer for demo purpose
- const wallet = Wallet.createRandom();
-
- (async () => {
-   const request = await requestNetwork.createRequest(proxyContractCreateParams);
-
-   // Check the payer has sufficient fund for the data
-   const payerAddress = wallet.address;
-   const requestData = request.getData();
-   if (!(await hasSufficientFunds(requestData, payerAddress))) {
-     throw new Error('You do not have enough funds to pay this request');
-   }
-
-   // Pay the request
-   // The value provided for wallet can be a Web3Provider from 'ethers/providers' to be able to pay with Metamask
-   const tx = await payRequest(requestData, wallet);
-   await tx.wait(1);
- })(); 
-
 /**
  * ## Request creation with address based payment network
  *
@@ -161,8 +132,29 @@ const addressBasedCreateParams = {
 })();
 
 /**
- * ### Paying an erc20 address based request
+ * ## Checking the balance of an erc20 request
  * 
- * Requests created with the address based payment network must be manually paid by sending an erc20 transfer to the payment address.
- * You can do this by calling `transfer(to, amount)` method of the erc20 token. `to` is the payment address and `amount` the amount the payer wants to pay.
+ * The function getData() of a request provides its balance
+ * This function is available independently of the payment network used
  */
+
+// Import Big Number package
+const BN = require('bn.js')
+
+(async () => {
+  // Use a proxy contract request for example
+  const request = await requestNetwork.createRequest(proxyContractCreateParams);
+
+  // Check the balance of the request
+  const requestData = request.getData();
+  const balance = requestData.balance;
+  console.log(`Balance of the erc20 proxy contract request: ${balance}`);
+
+  // Check if the request has been paid
+  // Convert the balance to big number type for comparison
+  const expectedAmount = new BN(requestData.expectedAmount);
+  const balanceBigNumber = new BN(balance);
+
+  // Check if balanceBigNumber is greater or equal to expectedAmount
+  const paid = balanceBigNumber.gte(expectedAmount);
+})(); 

packages/docs/docs/guides/5-request-client/3-eth-payment-detection.ts

@@ -105,30 +105,27 @@ const ethInputDataCreateParams = {
 })();
 
 /**
- * ### Paying an ether request with Request payment processor
+ * ## Checking balance
  * 
- * Requests using ether payment network can be paid with the Request payment processor
+ * The function getData() of a request provides its balance
  */
 
- // Import necessary packages
- import { hasSufficientFunds, payRequest } from '@requestnetwork/payment-processor';
- import { Wallet } from 'ethers';
-
- // Create a wallet for the payer for demo purpose
- const wallet = Wallet.createRandom();
-
- (async () => {
-   const request = await requestNetwork.createRequest(ethInputDataCreateParams);
-
-   // Check the payer has sufficient fund for the data
-   const payerAddress = wallet.address;
-   const requestData = request.getData();
-   if (!(await hasSufficientFunds(requestData, payerAddress))) {
-     throw new Error('You do not have enough funds to pay this request');
-   }
-
-   // Pay the request
-   // The value provided for wallet can be a Web3Provider from 'ethers/providers' to be able to pay with Metamask
-   const tx = await payRequest(requestData, wallet);
-   await tx.wait(1);
- })(); 
+// Import Big Number package
+const BN = require('bn.js')
+
+(async () => {
+  const request = await requestNetwork.createRequest(ethInputDataCreateParams);
+
+  // Check the balance of the request
+  const requestData = request.getData();
+  const balance = requestData.balance;
+  console.log(`Balance of the ether input data request: ${balance}`);
+
+  // Check if the request has been paid
+  // Convert the balance to big number type for comparison
+  const expectedAmount = new BN(requestData.expectedAmount);
+  const balanceBigNumber = new BN(balance);
+
+  // Check if balanceBigNumber is greater or equal to expectedAmount
+  const paid = balanceBigNumber.gte(expectedAmount);
+})(); 

packages/docs/docs/guides/5-request-client/4-btc-payment-detection.ts

@@ -106,9 +106,28 @@ const bitcoinAddressBasedCreateParams = {
   console.log(`Request created with Bitcoin payment network: ${request.requestId}`);
 })();
 
-/**
- * ### Paying a Bitcoin request
+ /**
+ * ## Checking balance
  * 
- * The Request payment processor package doesn't support the payment of Bitcoin request.
- * The Bitcoin payment network is of type "Address Based", therefore, the payer can simply pay the request by sending the right amount of BTC to the payment address.
+ * The function getData() of a request provides its balance
  */
+
+// Import Big Number package
+const BN = require('bn.js')
+
+(async () => {
+  const request = await requestNetwork.createRequest(bitcoinAddressBasedCreateParams);
+
+  // Check the balance of the request
+  const requestData = request.getData();
+  const balance = requestData.balance;
+  console.log(`Balance of the bitcoin address based request: ${balance}`);
+
+  // Check if the request has been paid
+  // Convert the balance to big number type for comparison
+  const expectedAmount = new BN(requestData.expectedAmount);
+  const balanceBigNumber = new BN(balance);
+
+  // Check if balanceBigNumber is greater or equal to expectedAmount
+  const paid = balanceBigNumber.gte(expectedAmount);
+})(); 

packages/docs/docs/guides/5-request-client/5-declarative-payment-network.ts

@@ -110,12 +110,15 @@ const declarativeCreateParams = {
 })();
 
 /**
- * ### Declaring sent and received payments
+ * ## Declaring sent and received payments and checking balance
  * 
  * The Declarative payment network doesn't provide payment detection method to determine the balance of the request
  * The balance of the request is defined by the declared payments by the payee and the declared refunds by the payer
  */
 
+ // Import Big Number package
+const BN = require('bn.js')
+
  (async () => {
   const request = await requestNetwork.createRequest(declarativeCreateParams);
 
@@ -133,5 +136,17 @@ const declarativeCreateParams = {
 
   // Declaring a sent refund, this amount is not taken into account for the request balance
   request.declareSentPayment('900', 'received too much', payeeIdentity);
-})(); 
 
+  // Check the balance of the request
+  const requestData = request.getData();
+  const balance = requestData.balance;
+  console.log(`Balance of the declarative request: ${balance}`);
+
+  // Check if the request has been paid
+  // Convert the balance to big number type for comparison
+  const expectedAmount = new BN(requestData.expectedAmount);
+  const balanceBigNumber = new BN(balance);
+
+  // Check if balanceBigNumber is greater or equal to expectedAmount
+  const paid = balanceBigNumber.gte(expectedAmount);
+})(); 

packages/docs/package.json

@@ -41,6 +41,7 @@
     "@requestnetwork/types": "0.12.0",
     "@requestnetwork/payment-processor": "0.13.0",
     "@requestnetwork/smart-contracts": "0.4.0",
+    "bn.js": "5.1.1",
     "classnames": "2.2.6",
     "core-js": "3.6.4",
     "ethers": "^4.0.45",

yarn.lock

@@ -3644,6 +3644,11 @@ bn.js@4.11.8, bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.11.0, bn.js@^4.
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"
   integrity sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==
 
+bn.js@^5.1.1:
+  version "5.1.1"
+  resolved "http://localhost:4873/bn.js/-/bn.js-5.1.1.tgz#48efc4031a9c4041b9c99c6941d903463ab62eb5"
+  integrity sha512-IUTD/REb78Z2eodka1QZyyEk66pciRcP6Sroka0aI3tG/iwIdYLrBD62RsubR7vqdt3WyX8p4jxeatzmRSphtA==
+
 body-parser@1.19.0, body-parser@^1.16.0:
   version "1.19.0"
   resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"