diff --git a/moksha-core/src/fixtures/nutshell_mint_info.json b/moksha-core/src/fixtures/nutshell_mint_info.json
index 2dd356fc..4711bf05 100644
--- a/moksha-core/src/fixtures/nutshell_mint_info.json
+++ b/moksha-core/src/fixtures/nutshell_mint_info.json
@@ -11,8 +11,28 @@
   ],
   "motd": "Message to users",
   "nuts": {
-    "4": { "methods": [["bolt11", "sat"]], "disabled": false },
-    "5": { "methods": [["bolt11", "sat"]], "disabled": false },
+    "4": {
+      "methods": [
+        {
+          "method": "bolt11",
+          "unit": "sat",
+          "min_amount": 1,
+          "max_amount": 21
+        }
+      ],
+      "disabled": false
+    },
+    "5": {
+      "methods": [
+        {
+          "method": "bolt11",
+          "unit": "sat",
+          "min_amount": 1,
+          "max_amount": 42
+        }
+      ],
+      "disabled": false
+    },
     "7": { "supported": true },
     "8": { "supported": true },
     "9": { "supported": true },
diff --git a/moksha-core/src/primitives.rs b/moksha-core/src/primitives.rs
index 28916719..98bd7bad 100644
--- a/moksha-core/src/primitives.rs
+++ b/moksha-core/src/primitives.rs
@@ -423,14 +423,20 @@ pub struct Nuts {
 
 #[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq, ToSchema)]
 pub struct Nut4 {
-    pub methods: Vec<(PaymentMethod, CurrencyUnit)>,
+    #[serde(rename = "methods")]
+    pub payment_methods: Vec<PaymentMethodConfig>,
     pub disabled: bool,
 }
 
 impl Default for Nut4 {
     fn default() -> Self {
         Self {
-            methods: vec![(PaymentMethod::Bolt11, CurrencyUnit::Sat)],
+            payment_methods: vec![PaymentMethodConfig {
+                payment_method: PaymentMethod::Bolt11,
+                unit: CurrencyUnit::Sat,
+                min_amount: Some(1),
+                max_amount: Some(10_000_000),
+            }],
             disabled: false,
         }
     }
@@ -438,13 +444,21 @@ impl Default for Nut4 {
 
 #[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq, ToSchema)]
 pub struct Nut5 {
-    pub methods: Vec<(PaymentMethod, CurrencyUnit)>,
+    #[serde(rename = "methods")]
+    pub payment_methods: Vec<PaymentMethodConfig>,
+    pub disabled: bool,
 }
 
 impl Default for Nut5 {
     fn default() -> Self {
         Self {
-            methods: vec![(PaymentMethod::Bolt11, CurrencyUnit::Sat)],
+            payment_methods: vec![PaymentMethodConfig {
+                payment_method: PaymentMethod::Bolt11,
+                unit: CurrencyUnit::Sat,
+                min_amount: Some(1),
+                max_amount: Some(10_000_000),
+            }],
+            disabled: false,
         }
     }
 }
@@ -489,11 +503,21 @@ pub struct Nut12 {
 pub struct Nut14 {
     pub supported: bool,
     #[serde(rename = "methods")]
-    pub payment_methods: Vec<PaymentMethodConfig>,
+    pub payment_methods: Vec<PaymentMethodConfigBtcOnchain>,
 }
 
 #[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq, ToSchema)]
 pub struct PaymentMethodConfig {
+    #[serde(rename = "method")]
+    pub payment_method: PaymentMethod,
+    pub unit: CurrencyUnit,
+    pub min_amount: Option<u64>,
+    pub max_amount: Option<u64>,
+}
+
+#[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq, ToSchema)]
+pub struct PaymentMethodConfigBtcOnchain {
+    #[serde(rename = "method")]
     pub payment_method: PaymentMethod,
     pub unit: CurrencyUnit,
     pub min_amount: u64,
@@ -504,7 +528,7 @@ impl Default for Nut14 {
     fn default() -> Self {
         Self {
             supported: true,
-            payment_methods: vec![PaymentMethodConfig {
+            payment_methods: vec![PaymentMethodConfigBtcOnchain {
                 payment_method: PaymentMethod::BtcOnchain,
                 unit: CurrencyUnit::Sat,
                 min_amount: 1_000,
@@ -518,14 +542,14 @@ impl Default for Nut14 {
 pub struct Nut15 {
     pub supported: bool,
     #[serde(rename = "methods")]
-    pub payment_methods: Vec<PaymentMethodConfig>,
+    pub payment_methods: Vec<PaymentMethodConfigBtcOnchain>,
 }
 
 impl Default for Nut15 {
     fn default() -> Self {
         Self {
             supported: true,
-            payment_methods: vec![PaymentMethodConfig {
+            payment_methods: vec![PaymentMethodConfigBtcOnchain {
                 payment_method: PaymentMethod::BtcOnchain,
                 unit: CurrencyUnit::Sat,
                 min_amount: 1_000,
diff --git a/moksha-mint/src/config.rs b/moksha-mint/src/config.rs
index bf8c3537..15420a3f 100644
--- a/moksha-mint/src/config.rs
+++ b/moksha-mint/src/config.rs
@@ -1,7 +1,9 @@
 use std::{env, net::SocketAddr, path::PathBuf, str::FromStr};
 
 use clap::Parser;
-use moksha_core::primitives::{CurrencyUnit, Nut14, Nut15, PaymentMethod, PaymentMethodConfig};
+use moksha_core::primitives::{
+    CurrencyUnit, Nut14, Nut15, PaymentMethod, PaymentMethodConfigBtcOnchain,
+};
 use serde::{Deserialize, Serialize};
 
 use crate::lightning::{
@@ -211,7 +213,7 @@ impl From<BtcOnchainConfig> for Nut14 {
     fn from(settings: BtcOnchainConfig) -> Self {
         Self {
             supported: true,
-            payment_methods: vec![PaymentMethodConfig {
+            payment_methods: vec![PaymentMethodConfigBtcOnchain {
                 payment_method: PaymentMethod::BtcOnchain,
                 unit: CurrencyUnit::Sat,
                 min_amount: settings.min_amount,
@@ -225,7 +227,7 @@ impl From<BtcOnchainConfig> for Nut15 {
     fn from(settings: BtcOnchainConfig) -> Self {
         Self {
             supported: true,
-            payment_methods: vec![PaymentMethodConfig {
+            payment_methods: vec![PaymentMethodConfigBtcOnchain {
                 payment_method: PaymentMethod::BtcOnchain,
                 unit: CurrencyUnit::Sat,
                 min_amount: settings.min_amount,