1 files changed, 42 insertions, 0 deletions

diff --git a/main/cashu.h b/main/cashu.h
new file mode 100644
index 0000000..17891c5
--- /dev/null
+++ b/main/cashu.h
@@ -0,0 +1,42 @@
+#ifndef CASHU_H
+#define CASHU_H
+
+#include "esp_err.h"
+#include <stdint.h>
+#include <stdbool.h>
+
+#define CASHU_MAX_PROOFS      10
+#define CASHU_MAX_SECRET_LEN  128
+#define CASHU_MAX_ID_LEN      16
+#define CASHU_MAX_C_LEN       128
+
+typedef struct {
+    uint64_t amount;
+    char id[CASHU_MAX_ID_LEN];
+    char secret[CASHU_MAX_SECRET_LEN];
+    char c[CASHU_MAX_C_LEN];
+} cashu_proof_t;
+
+typedef struct {
+    cashu_proof_t proofs[CASHU_MAX_PROOFS];
+    int proof_count;
+    char mint_url[256];
+    uint64_t total_amount;
+} cashu_token_t;
+
+typedef struct {
+    char y_hex[65];
+    bool spent;
+} cashu_proof_state_t;
+
+esp_err_t cashu_decode_token(const char *token_str, cashu_token_t *out);
+
+esp_err_t cashu_check_proof_states(const char *mint_url, const cashu_token_t *token,
+                                   cashu_proof_state_t *states, int *state_count);
+
+uint64_t cashu_calculate_allotment_ms(uint64_t token_amount, uint64_t price_per_step,
+                                       uint64_t step_size_ms);
+
+bool cashu_is_mint_accepted(const char *mint_url);
+
+#endif