Add register token how-to

docs/build/isc/v1.0.0-rc.6/docs/how-tos/native-token/register-token.md

@@ -0,0 +1,28 @@
+---
+description: How to register a native token as ERC20
+image: /img/logo/WASP_logo_dark.png
+tags:
+  - ERC20
+  - EVM
+  - how-to
+---
+
+## Register Tokens
+
+To properly use your native tokens you should register them as ERC20 using the `registerERC20NativeToken`.
+
+## Example Code
+
+1. Create the allowance
+2. Register the native tokens specifying the foundry serial number, a name, a symbol, it's decimals and the allowance.
+
+```solidity
+    function registerERC20NativeToken(uint32 _foundrySN, string calldata _name, string calldata _symbol, uint8 _decimals) public {
+        ISCAssets memory allowance = ISCAssets({
+            baseTokens: 500_000,
+            nativeTokens: new NativeToken[](0),
+            nfts: new NFTID[](0)
+        });
+        ISC.sandbox.registerERC20NativeToken(_foundrySN, _name, _symbol, _decimals, allowance);
+    }
+```

docs/build/isc/v1.0.0-rc.6/sidebars.js

@@ -165,6 +165,11 @@ module.exports = {
                   label: 'Create Foundry',
                   id: 'how-tos/native-token/create-foundry',
                 },
+                {
+                  type: 'doc',
+                  label: 'Register Token as ERC20',
+                  id: 'how-tos/native-token/register-erc20',
+                }
                 {
                   type: 'doc',
                   label: 'Mint Token',