diff --git a/packages/chains/src/chains/index.ts b/packages/chains/src/chains/index.ts
index 83a7dce..cd3a6c6 100644
--- a/packages/chains/src/chains/index.ts
+++ b/packages/chains/src/chains/index.ts
@@ -1,5 +1,6 @@
 export { default as algorand } from './algorand';
 export { default as algorandBetanet } from './algorandBetanet';
+export { default as algorandTestnet } from './algorandTestnet';
 export { default as fnet } from './fnet';
 export { default as voi } from './voi';
 export { default as voiTestnet } from './voiTestnet';
diff --git a/packages/chains/src/utilities/caip/chainID.ts b/packages/chains/src/utilities/caip/chainID.ts
new file mode 100644
index 0000000..22e9c42
--- /dev/null
+++ b/packages/chains/src/utilities/caip/chainID.ts
@@ -0,0 +1,12 @@
+// types
+import type { Chain } from '@/types';
+
+/**
+ * Generates the CAIP-002 chain identifier by combining the namespace and reference with a colon.
+ * @param {chain} Chain - The chain.
+ * @return {string} The CAIP-002 chain identifier as "namespace:reference".
+ * @see {@link https://chainagnostic.org/CAIPs/caip-2}
+ */
+export default function chainID({ namespace, reference }: Chain): string {
+  return `${namespace}:${reference}`;
+}
diff --git a/packages/chains/src/utilities/caip/index.ts b/packages/chains/src/utilities/caip/index.ts
new file mode 100644
index 0000000..d6f6930
--- /dev/null
+++ b/packages/chains/src/utilities/caip/index.ts
@@ -0,0 +1 @@
+export { default as chainID } from './chainID';