diff --git a/README.md b/README.md
index c5d41dc..575345e 100644
--- a/README.md
+++ b/README.md
@@ -395,4 +395,17 @@ const alias = "alias";
 
 ## Requirements
 
-- Correct RPC URLs for the wallet and daemon.
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+- Correct RPC URLs for the wallet and daemon.
+
+# Shared logic
+## Usage
+### validateTokensInput util
+validateTokensInput function checks whether a numeric or string value can be used as an amount for an asset with the specified DP.
+
+```typescript
+import { validateTokensInput } from "zano_web3/shared";
+
+let isValidAmount = validateTokensInput("18446744.073709551615", 12); // true
+
+isValidAmount = validateTokensInput("18446744.073709551616", 12); // false
+```
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