diff --git a/cln-integration/Cargo.lock b/cln-integration/Cargo.lock
index 627e3e6..b28ee2b 100644
--- a/cln-integration/Cargo.lock
+++ b/cln-integration/Cargo.lock
@@ -169,6 +169,15 @@ version = "2.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed570934406eb16438a4e976b1b4500774099c13b8cb96eec99f620f05090ddf"
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bytes"
 version = "1.5.0"
@@ -228,10 +237,12 @@ dependencies = [
  "anyhow",
  "clightning-testing",
  "env_logger",
+ "hex",
  "log",
  "ntest",
  "serde",
  "serde_json",
+ "sha2",
  "tokio",
 ]
 
@@ -241,6 +252,35 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53fe5e26ff1b7aef8bca9c6080520cfb8d9333c7568e1829cef191a9723e5504"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crypto-common"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "env_filter"
 version = "0.1.0"
@@ -286,6 +326,16 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.12"
@@ -315,6 +365,12 @@ version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "379dada1584ad501b383485dd706b8afb7a70fcbc7f4da7d780638a5a6124a60"
 
+[[package]]
+name = "hex"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
+
 [[package]]
 name = "hex_lit"
 version = "0.1.1"
@@ -641,6 +697,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.1"
@@ -729,6 +796,12 @@ dependencies = [
  "winnow",
 ]
 
+[[package]]
+name = "typenum"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
@@ -741,6 +814,12 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
diff --git a/cln-integration/Cargo.toml b/cln-integration/Cargo.toml
index 298cab6..1cc87b1 100644
--- a/cln-integration/Cargo.toml
+++ b/cln-integration/Cargo.toml
@@ -12,3 +12,5 @@ tokio = { version = "1.36.0", features = ["rt-multi-thread", "macros"] }
 serde = "1.0"
 serde_json = "1.0.1"
 ntest = "0.9.0"
+sha2 = "0.10"
+hex = "0.4"
diff --git a/cln-integration/src/main.rs b/cln-integration/src/main.rs
index d8b1a6e..917ac95 100644
--- a/cln-integration/src/main.rs
+++ b/cln-integration/src/main.rs
@@ -94,5 +94,51 @@ async fn test_ocean_simple_payout() -> anyhow::Result<()> {
     }
     let payout = payout.unwrap();
     log::info!("ocean-pay response {}", serde_json::to_string_pretty(&payout)?);
+
+    #[derive(Deserialize)]
+    struct OceanPayout {
+        // The invoice decode command result
+        invoice_decode: DecodeInvoice,
+        // The information from the pay command
+        pay: PayResult,
+    }
+
+    #[derive(Deserialize)]
+    struct DecodeInvoice {
+        // The node that we paid, in our case the miner node
+        invoice_node_id: String,
+        // The invoice payment hash
+        invoice_payment_hash: String,
+        // The public key of the node that ask for the invoice
+        // in our case the ocean lightning node.
+        invreq_payer_id: String,
+    }
+
+    #[derive(Deserialize)]
+    struct PayResult {
+        /// Primage: The proof that the miner
+        /// give to us when the payment is received
+        payment_preimage: String,
+        /// The hash of the preimage that is inside the invoice
+        payment_hash: String,
+    }
+
+    let payout = serde_json::from_value::<OceanPayout>(payout)?;
+    // Time for proof
+    // proof that the invoice is paied
+    assert_eq!(payout.invoice_decode.invoice_payment_hash, payout.pay.payment_hash);
+
+    let calculate_payout = calculate_payment_hash(&payout.pay.payment_preimage);
+    assert_eq!(payout.pay.payment_hash, calculate_payout);
+
+    // We can check that we pay the miner because we are able to
+    // derive the invreq_payer_id frm the invreq_metadata but
+    // we need to implement this code or expose the code from CLN
+    // FIXME: See https://github.com/ElementsProject/lightning/blob/master/lightningd/offer.c#L434-L463
+
+    // And we can check also that we pay the miner
+    let info = miner_1.rpc().getinfo()?;
+    let id = info.id;
+    assert_eq!(id, payout.invoice_decode.invoice_node_id);
     Ok(())
 }
diff --git a/cln-integration/src/utils.rs b/cln-integration/src/utils.rs
index a42b795..04bcac3 100644
--- a/cln-integration/src/utils.rs
+++ b/cln-integration/src/utils.rs
@@ -169,3 +169,20 @@ pub fn wait_for_funds(cln: &cln::Node) -> anyhow::Result<()> {
     );
     Ok(())
 }
+
+pub fn calculate_payment_hash(preimage: &str) -> String {
+    use sha2::{Sha256, Digest};
+    use hex::decode as hex_decode;
+
+    // Decode the hex-encoded preimage string to bytes
+    let preimage_bytes = hex_decode(preimage).expect("Decoding failed");
+
+    // Create a Sha256 object
+    let mut hasher = Sha256::new();
+
+    // Write input message
+    hasher.update(preimage_bytes);
+
+    // Read hash digest and convert it to a hexadecimal string
+    format!("{:x}", hasher.finalize())
+}