diff --git a/README.md b/README.md
index 6914f04..7c8f174 100644
--- a/README.md
+++ b/README.md
@@ -39,4 +39,5 @@ Run the scripts
 npm run retrieve
 npm run create
 npm run pay
+npm run declare
 ```
diff --git a/package-lock.json b/package-lock.json
index 3760fc3..347e361 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,9 +9,9 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
-        "@requestnetwork/epk-signature": "^0.7.1-next.2043",
-        "@requestnetwork/payment-processor": "0.45.1-next.2043",
-        "@requestnetwork/request-client.js": "0.47.1-next.2043",
+        "@requestnetwork/epk-signature": "0.8.0",
+        "@requestnetwork/payment-processor": "0.46.0",
+        "@requestnetwork/request-client.js": "0.48.0",
         "dotenv": "16.3.1",
         "ethers": "5.7.2"
       },
@@ -739,9 +739,9 @@
       }
     },
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-      "version": "1.4.15",
-      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.15.tgz",
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+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
+      "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ=="
     },
     "node_modules/@jridgewell/trace-mapping": {
       "version": "0.3.25",
@@ -946,13 +946,13 @@
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     },
     "node_modules/@requestnetwork/advanced-logic": {
-      "version": "0.42.1-next.2043",
-      "resolved": "https://registry.npmjs.org/@requestnetwork/advanced-logic/-/advanced-logic-0.42.1-next.2043.tgz",
-      "integrity": "sha512-la2w27NMwxBql3VEFMjJDvIcwZ6ssWcKNOPuC0ZQWWL5tso5UCQ2/RsyagzYxg45dVGf4kPDJOfZ9SzrnqeGQw==",
+      "version": "0.43.0",
+      "resolved": "https://registry.npmjs.org/@requestnetwork/advanced-logic/-/advanced-logic-0.43.0.tgz",
+      "integrity": "sha512-bSMTtZR+nEVsbJzluj4AN1qlJ6hmS4nyNq7wwp9xpcaT5kRAEHMgqJconhV5s/SvpKog/HjtjxrLK0/kKWb+zw==",
       "dependencies": {
-        "@requestnetwork/currency": "0.16.1-next.2043+d9feda6f",
-        "@requestnetwork/types": "0.43.1-next.2043+d9feda6f",
-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
+        "@requestnetwork/currency": "0.17.0",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
         "tslib": "2.5.0"
       },
       "engines": {
@@ -960,13 +960,13 @@
       }
     },
     "node_modules/@requestnetwork/currency": {
-      "version": "0.16.1-next.2043",
-      "resolved": "https://registry.npmjs.org/@requestnetwork/currency/-/currency-0.16.1-next.2043.tgz",
-      "integrity": "sha512-y9ATzr5t7YVZUWU7w+aAO0bErc0V0ddSuHcVkCZAILepXzWAx5PcChCxf7tivFkRawug9q5bv73o7lRFKLgV+Q==",
+      "version": "0.17.0",
+      "resolved": "https://registry.npmjs.org/@requestnetwork/currency/-/currency-0.17.0.tgz",
+      "integrity": "sha512-ob83CYw9Zuq1TaZMUf/57qjiOlkpd3Dco0jC7hq0eWTLatJnrYbQl2bNhQYnS+lfBxnmgHthMu+aUFbd6sKtFA==",
       "dependencies": {
         "@metamask/contract-metadata": "1.31.0",
-        "@requestnetwork/types": "0.43.1-next.2043+d9feda6f",
-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
         "multicoin-address-validator": "0.5.15",
         "node-dijkstra": "2.5.0",
         "tslib": "2.5.0"
@@ -976,13 +976,13 @@
       }
     },
     "node_modules/@requestnetwork/data-access": {
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-      "resolved": "https://registry.npmjs.org/@requestnetwork/data-access/-/data-access-0.34.1-next.2043.tgz",
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+      "version": "0.35.0",
+      "resolved": "https://registry.npmjs.org/@requestnetwork/data-access/-/data-access-0.35.0.tgz",
+      "integrity": "sha512-OhpLU+SsTgA7yteBy+j2jQltRITXcBxrsE/u8UNsj2z5ms+uLJq95R74QzLUsaMk5f4wt5d7h212ox7CnyQRqw==",
       "dependencies": {
-        "@requestnetwork/multi-format": "0.17.1-next.2043+d9feda6f",
-        "@requestnetwork/types": "0.43.1-next.2043+d9feda6f",
-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
+        "@requestnetwork/multi-format": "0.18.0",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
         "tslib": "2.5.0"
       },
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@@ -990,9 +990,9 @@
       }
     },
     "node_modules/@requestnetwork/data-format": {
-      "version": "0.17.1-next.2043",
-      "resolved": "https://registry.npmjs.org/@requestnetwork/data-format/-/data-format-0.17.1-next.2043.tgz",
-      "integrity": "sha512-y0KfAQL6Zk8Q5ii1/KuDt92jmSZzrYDTY7skBi+t19LflU0xWrbfnySYycVYV4P/L1e8Qbn3VgfDeMR7etW0Iw==",
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+      "resolved": "https://registry.npmjs.org/@requestnetwork/data-format/-/data-format-0.18.0.tgz",
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         "ajv": "6.12.4",
         "ethers": "5.5.1",
@@ -1724,12 +1724,12 @@
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     "node_modules/@requestnetwork/epk-signature": {
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-      "resolved": "https://registry.npmjs.org/@requestnetwork/epk-signature/-/epk-signature-0.7.1-next.2043.tgz",
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+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/@requestnetwork/epk-signature/-/epk-signature-0.8.0.tgz",
+      "integrity": "sha512-KbcDoPTP1uyr4eVlNsxwDwRiDFAVkODyPq4ypn25GVry6uw5dKXRMzvUifsP1RiGb0T1aIYgY+frYE4Emg5qTg==",
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-        "@requestnetwork/types": "0.43.1-next.2043+d9feda6f",
-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
         "tslib": "2.5.0"
       },
       "engines": {
@@ -1737,11 +1737,11 @@
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     "node_modules/@requestnetwork/multi-format": {
-      "version": "0.17.1-next.2043",
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-      "integrity": "sha512-GHs6oM5oMcNzQnTTdngqiyfourMAChp/UUjG2AQT+PAw34L3euHFXER7GudvMjgj6YudiFBNcHvPUyLKnQwpFA==",
+      "version": "0.18.0",
+      "resolved": "https://registry.npmjs.org/@requestnetwork/multi-format/-/multi-format-0.18.0.tgz",
+      "integrity": "sha512-F2NgMhjqUH/JLFEggN/IKRCG933CR7M4bxBMSYIryV8/2wBVhzW91Y1HHrG/gZlE2QLklXokWcID95moWFbwVw==",
       "dependencies": {
-        "@requestnetwork/types": "0.43.1-next.2043+d9feda6f",
+        "@requestnetwork/types": "0.44.0",
         "tslib": "2.5.0"
       },
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@@ -1749,14 +1749,14 @@
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-        "@requestnetwork/smart-contracts": "0.36.1-next.2043+d9feda6f",
-        "@requestnetwork/types": "0.43.1-next.2043+d9feda6f",
-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
+      "version": "0.44.0",
+      "resolved": "https://registry.npmjs.org/@requestnetwork/payment-detection/-/payment-detection-0.44.0.tgz",
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+      "dependencies": {
+        "@requestnetwork/currency": "0.17.0",
+        "@requestnetwork/smart-contracts": "0.37.0",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
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@@ -2490,16 +2490,16 @@
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+      "resolved": "https://registry.npmjs.org/@requestnetwork/payment-processor/-/payment-processor-0.46.0.tgz",
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       "dependencies": {
         "@openzeppelin/contracts": "4.9.6",
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-        "@requestnetwork/payment-detection": "0.43.1-next.2043+d9feda6f",
-        "@requestnetwork/smart-contracts": "0.36.1-next.2043+d9feda6f",
-        "@requestnetwork/types": "0.43.1-next.2043+d9feda6f",
-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
+        "@requestnetwork/currency": "0.17.0",
+        "@requestnetwork/payment-detection": "0.44.0",
+        "@requestnetwork/smart-contracts": "0.37.0",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
         "@superfluid-finance/sdk-core": "0.5.0",
         "ethers": "5.5.1",
         "near-api-js": "4.0.2",
@@ -3276,22 +3276,22 @@
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     "node_modules/@requestnetwork/request-client.js": {
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-        "@requestnetwork/currency": "0.16.1-next.2043+d9feda6f",
-        "@requestnetwork/data-access": "0.34.1-next.2043+d9feda6f",
-        "@requestnetwork/data-format": "0.17.1-next.2043+d9feda6f",
-        "@requestnetwork/epk-signature": "0.7.1-next.2043+d9feda6f",
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-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
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+      "resolved": "https://registry.npmjs.org/@requestnetwork/request-client.js/-/request-client.js-0.48.0.tgz",
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+      "dependencies": {
+        "@requestnetwork/advanced-logic": "0.43.0",
+        "@requestnetwork/currency": "0.17.0",
+        "@requestnetwork/data-access": "0.35.0",
+        "@requestnetwork/data-format": "0.18.0",
+        "@requestnetwork/epk-signature": "0.8.0",
+        "@requestnetwork/multi-format": "0.18.0",
+        "@requestnetwork/payment-detection": "0.44.0",
+        "@requestnetwork/request-logic": "0.34.0",
+        "@requestnetwork/smart-contracts": "0.37.0",
+        "@requestnetwork/transaction-manager": "0.35.0",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
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@@ -4022,14 +4022,14 @@
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-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
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+        "@requestnetwork/multi-format": "0.18.0",
+        "@requestnetwork/types": "0.44.0",
+        "@requestnetwork/utils": "0.44.0",
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@@ -4038,9 +4038,9 @@
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+      "resolved": "https://registry.npmjs.org/@requestnetwork/smart-contracts/-/smart-contracts-0.37.0.tgz",
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@@ -4049,13 +4049,13 @@
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+      "resolved": "https://registry.npmjs.org/@requestnetwork/transaction-manager/-/transaction-manager-0.35.0.tgz",
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-        "@requestnetwork/utils": "0.43.1-next.2043+d9feda6f",
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@@ -4063,9 +4063,9 @@
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@@ -4795,11 +4795,11 @@
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@@ -5712,9 +5712,9 @@
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@@ -8568,9 +8568,9 @@
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       "requires": {
         "@jridgewell/source-map": "^0.3.3",
         "acorn": "^8.8.2",
@@ -14620,9 +14620,9 @@
       },
       "dependencies": {
         "acorn": {
-          "version": "8.12.0",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.0.tgz",
-          "integrity": "sha512-RTvkC4w+KNXrM39/lWCUaG0IbRkWdCv7W/IOW9oU6SawyxulvkQy5HQPVTKxEjczcUvapcrw3cFx/60VN/NRNw=="
+          "version": "8.12.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.1.tgz",
+          "integrity": "sha512-tcpGyI9zbizT9JbV6oYE477V6mTlXvvi0T0G3SNIYE2apm/G5huBa1+K89VGeovbg+jycCrfhl3ADxErOuO6Jg=="
         },
         "commander": {
           "version": "2.20.3",
diff --git a/package.json b/package.json
index 53570c3..86b4cf6 100644
--- a/package.json
+++ b/package.json
@@ -8,14 +8,15 @@
     "prepare": "husky install",
     "retrieve": "node src/retrieveRequest.js",
     "create": "node src/createRequest.js",
-    "pay": "node src/payRequest.js"
+    "pay": "node src/payRequest.js",
+    "declare": "node src/declarePaymentSentAndReceived.js"
   },
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@requestnetwork/epk-signature": "0.7.1-next.2043",
-    "@requestnetwork/payment-processor": "0.45.1-next.2043",
-    "@requestnetwork/request-client.js": "0.47.1-next.2043",
+    "@requestnetwork/epk-signature": "0.8.0",
+    "@requestnetwork/payment-processor": "0.46.0",
+    "@requestnetwork/request-client.js": "0.48.0",
     "dotenv": "16.3.1",
     "ethers": "5.7.2"
   },
diff --git a/src/declarePaymentSentAndReceived.js b/src/declarePaymentSentAndReceived.js
new file mode 100644
index 0000000..c77f4ed
--- /dev/null
+++ b/src/declarePaymentSentAndReceived.js
@@ -0,0 +1,161 @@
+const waitForConfirmation = async (dataOrPromise) => {
+  const data = await dataOrPromise;
+  return new Promise((resolve, reject) => {
+    data.on("confirmed", resolve);
+    data.on("error", reject);
+  });
+};
+
+(async () => {
+  const {
+    RequestNetwork,
+    Types,
+    Utils,
+  } = require("@requestnetwork/request-client.js");
+  const {
+    EthereumPrivateKeySignatureProvider,
+  } = require("@requestnetwork/epk-signature");
+  const { config } = require("dotenv");
+  const { Wallet } = require("ethers");
+
+  // Load environment variables from .env file
+  config();
+
+  const payeeEpkSignatureProvider = new EthereumPrivateKeySignatureProvider({
+    method: Types.Signature.METHOD.ECDSA,
+    privateKey: process.env.PAYEE_PRIVATE_KEY, // Must include 0x prefix
+  });
+
+  const payerEpkSignatureProvider = new EthereumPrivateKeySignatureProvider({
+    method: Types.Signature.METHOD.ECDSA,
+    privateKey: process.env.PAYER_PRIVATE_KEY, // Must include 0x prefix
+  });
+
+  const payeeRequestClient = new RequestNetwork({
+    nodeConnectionConfig: {
+      baseURL: "https://sepolia.gateway.request.network/",
+    },
+    signatureProvider: payeeEpkSignatureProvider,
+  });
+
+  const payerRequestClient = new RequestNetwork({
+    nodeConnectionConfig: {
+      baseURL: "https://sepolia.gateway.request.network/",
+    },
+    signatureProvider: payerEpkSignatureProvider,
+  });
+
+  const payeeIdentityAddress = new Wallet(process.env.PAYEE_PRIVATE_KEY)
+    .address;
+  const payerIdentityAddress = new Wallet(process.env.PAYER_PRIVATE_KEY)
+    .address;
+
+  const payeeIdentity = {
+    type: Types.Identity.TYPE.ETHEREUM_ADDRESS,
+    value: payeeIdentityAddress,
+  };
+
+  const payerIdentity = {
+    type: Types.Identity.TYPE.ETHEREUM_ADDRESS,
+    value: payerIdentityAddress,
+  };
+
+  // In this example, the payee is also the payment recipient.
+  const paymentRecipient = payeeIdentityAddress;
+  const feeRecipient = "0x0000000000000000000000000000000000000000";
+
+  const requestCreateParameters = {
+    requestInfo: {
+      currency: {
+        type: Types.RequestLogic.CURRENCY.ERC20,
+        value: "0x370DE27fdb7D1Ff1e1BaA7D11c5820a324Cf623C", // FAU token address
+        network: "sepolia",
+      },
+      expectedAmount: "1000000000000000000", // 1.0
+      payee: payeeIdentity,
+      payer: payerIdentity,
+      timestamp: Utils.getCurrentTimestampInSecond(),
+    },
+    paymentNetwork: {
+      // We can declare payments because ERC20 fee proxy payment network inherits from declarative payment network
+      id: Types.Extension.PAYMENT_NETWORK_ID.ERC20_FEE_PROXY_CONTRACT,
+      parameters: {
+        paymentNetworkName: "sepolia",
+        paymentAddress: paymentRecipient,
+        feeAddress: feeRecipient,
+        feeAmount: "0",
+      },
+    },
+    contentData: {
+      reason: "🍕",
+      dueDate: "2023.06.16",
+      builderId: "request-network",
+      createdWith: "quickstart",
+    },
+    signer: payeeIdentity,
+  };
+
+  const payeeRequest = await payeeRequestClient.createRequest(
+    requestCreateParameters,
+  );
+  const payeeRequestData = await payeeRequest.waitForConfirmation();
+
+  const payerRequest = await payerRequestClient.fromRequestId(
+    payeeRequestData.requestId,
+  );
+  const payerRequestData = payerRequest.getData();
+
+  const payerRequestDataAfterSent = await payerRequest.declareSentPayment(
+    payerRequestData.expectedAmount,
+    "payment initiated from the bank",
+    payerIdentity,
+  );
+  console.log(
+    "payerRequestDataAfterSent: " +
+      JSON.stringify(payerRequestDataAfterSent, null, 2),
+  );
+
+  const payerRequestDataAfterSentConfirmed = await waitForConfirmation(
+    payerRequestDataAfterSent,
+  );
+  console.log(
+    "payerRequestDataAfterSentConfirmed: " +
+      JSON.stringify(payerRequestDataAfterSentConfirmed, null, 2),
+  );
+  console.log(
+    "Observe extensionsData contains 3 events: paymentNetwork 'create', contentData 'create', and paymentNetwork 'declareSentPayment'",
+  );
+
+  const payeeRequestDataRefreshed = await payeeRequest.refresh();
+
+  const payeeRequestDataAfterReceived =
+    await payeeRequest.declareReceivedPayment(
+      payeeRequestDataRefreshed.expectedAmount,
+      "payment received from the bank",
+      payeeIdentity,
+    );
+
+  const payeeRequestDataAfterReceivedConfirmed = await waitForConfirmation(
+    payeeRequestDataAfterReceived,
+  );
+  console.log(
+    "payeeRequestDataAfterReceivedConfirmed: " +
+      JSON.stringify(payeeRequestDataAfterReceivedConfirmed, null, 2),
+  );
+  console.log(
+    "Observe extensionsData contains 4 events: paymentNetwork 'create', contentData 'create', paymentNetwork 'declareSentPayment', and paymentNetwork 'declareReceivedPayment'",
+  );
+
+  console.log(
+    "Request balance: " +
+      payeeRequestDataAfterReceivedConfirmed.balance.balance,
+  );
+  console.log(
+    "Request balance events: " +
+      JSON.stringify(
+        payeeRequestDataAfterReceivedConfirmed.balance.events,
+        null,
+        2,
+      ),
+  );
+})();
diff --git a/src/payRequest.js b/src/payRequest.js
index 67b2606..84d3905 100644
--- a/src/payRequest.js
+++ b/src/payRequest.js
@@ -15,7 +15,6 @@
   } = require("@requestnetwork/payment-processor");
   const { providers, Wallet } = require("ethers");
   const { config } = require("dotenv");
-  const { Wallet } = require("ethers");
 
   // Load environment variables from .env file
   config();
@@ -89,13 +88,11 @@
   console.log(
     `Checking if payer ${payerWallet.address} has sufficient funds...`,
   );
-  const _hasSufficientFunds = await hasSufficientFunds(
-    requestData,
-    payerWallet.address,
-    {
-      provider: provider,
-    },
-  );
+  const _hasSufficientFunds = await hasSufficientFunds({
+    request: requestData,
+    address: payerWallet.address,
+    providerOptions: { provider: provider },
+  });
   console.log(`_hasSufficientFunds = ${_hasSufficientFunds}`);
   if (!_hasSufficientFunds) {
     throw new Error(`Insufficient Funds: ${payerWallet.address}`);