feat: add constants

docs/pages/typed/constants.md

@@ -0,0 +1,17 @@
+# Constants
+
+Constants are the simplest structure that we find inside the `TypedApi`. Constants are hard-coded key-value pairs that are embedded in the runtime metadata. In PAPI their structure is just a simple function that return its decoded value, with two alternatives. As explained in [the previous section](/typed) for `isCompatible`, we have two options to get the value:
+
+- Promise-based call, without passing the runtime
+- Synchronous return, passing the runtime previously awaited for
+
+Let's use `typedApi.constants.System.Version`. See in this example how it's used:
+
+```ts
+// in this case the function is asynchronous
+const versionAsync = await typedApi.constants.System.Version()
+
+const runtime = await typedApi.runtime.latest() // we already learnt about it!
+// in this case it's sync
+const versionSync = typedApi.constants.System.Version(runtime)
+```

vocs.config.tsx

@@ -26,6 +26,10 @@ export default defineConfig({
           text: "Typed API",
           link: "/typed",
           items: [
+            {
+              text: "Constants",
+              link: "/typed/constants",
+            },
             {
               text: "Storage queries",
               link: "/typed/queries",