From 4c335d5b255752c6b9f18f16ce04abdc9612844f Mon Sep 17 00:00:00 2001
From: Apisit Ritreungroj <apisit_lon@hotmail.com>
Date: Mon, 12 Feb 2024 15:35:43 +0700
Subject: [PATCH] feat: hash

---
 wasm/event-stubs/hash.c | 86 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 wasm/event-stubs/hash.c

diff --git a/wasm/event-stubs/hash.c b/wasm/event-stubs/hash.c
new file mode 100644
index 000000000..a0cf3dbc9
--- /dev/null
+++ b/wasm/event-stubs/hash.c
@@ -0,0 +1,86 @@
+#include <stdint.h>
+
+#include <stddef.h>
+
+typedef struct {
+  uint8_t * data;
+  size_t length;
+}
+Bstr;
+
+typedef enum {
+  KeyTooBig,
+  HashTooBig,
+}
+Errno;
+
+const char * errno_name(Errno errno) {
+  switch (errno) {
+  case KeyTooBig:
+    return "key-too-big";
+  case HashTooBig:
+    return "hash-too-big";
+  default:
+    return "unknown-error";
+  }
+}
+
+const char * errno_message(Errno errno) {
+  switch (errno) {
+  case HashTooBig:
+    return "The key is larger than supported by the hash function.";
+  default:
+    return "";
+  }
+}
+
+typedef struct {
+  int code;
+  const char * name;
+  const char * message;
+}
+Errno_Debug;
+
+Errno_Debug errno_debug(Errno errno) {
+  return (Errno_Debug) {
+    errno,
+    errno_name(errno),
+    errno_message(errno)
+  };
+}
+
+typedef struct {
+  Bstr( * blake2s)(Bstr buf, uint8_t outlen, Bstr key);
+  Bstr( * blake2b)(Bstr buf, uint8_t outlen, Bstr key);
+  Bstr( * blake3)(Bstr buf, uint8_t outlen, Bstr key);
+}
+HashAPI;
+
+Bstr blake2s(Bstr buf, uint8_t outlen, Bstr key) {
+  Bstr result;
+  // Implement the BLAKE2s hashing function here
+  return result;
+}
+
+Bstr blake2b(Bstr buf, uint8_t outlen, Bstr key) {
+  Bstr result;
+  // Implement the BLAKE2b hashing function here
+  return result;
+}
+
+Bstr blake3(Bstr buf, uint8_t outlen, Bstr key) {
+  Bstr result;
+  // Implement the BLAKE3 hashing function here
+  return result;
+}
+
+int main() {
+  HashAPI api = {
+    .blake2s = blake2s,
+    .blake2b = blake2b,
+    .blake3 = blake3,
+  };
+
+  // Use the API functions here
+  return 0;
+}