[DR-161] evm wrapping tokens

developers/developer-guides/vm-specific-tutorials/evm/wrapping-tokens.mdx

@@ -0,0 +1,17 @@
+---
+title: Wrapping Tokens
+---
+
+In MiniEVM Rollup, every bridged token is wrapped to 18 decimals, regardless of token or bridge type. This enforces a single decimal format and avoids issues caused by decimal differences. Wrapping is handled by the [Wrapper precompile](https://github.com/initia-labs/minievm/blob/main/x/evm/contracts/erc20_wrapper/ERC20Wrapper.sol) in MiniEVM. Initia bridge handles tokens with 6 decimals, so wrapped tokens with 18 decimals are unwrapped to 6 decimals before they are bridged to L1.
+
+When you bridge 6 decimals token from Initia L1 to an EVM rollup, it is converted into an 18 decimals ERC‑20 token.
+
+<Frame>
+![Wrapping Tokens](/images/evm/wrapping-erc20-tokens.png)
+</Frame>
+
+Unwrapping tokens is the reverse process, where you convert the 18 decimals ERC-20 token back to the original 6 decimals token on Initia L1. 
+
+<Frame>
+![Unwrapping Tokens](/images/evm/unwrapping-erc20-tokens.png)
+</Frame>

docs.json

@@ -179,6 +179,7 @@
                       "developers/developer-guides/vm-specific-tutorials/evm/creating-erc20s/creating-custom-erc20s"
                     ]
                   },
+                  "developers/developer-guides/vm-specific-tutorials/evm/wrapping-tokens",
                   "developers/developer-guides/vm-specific-tutorials/evm/update-fee-token",
                   "developers/developer-guides/vm-specific-tutorials/evm/connect-oracles",
                   "developers/developer-guides/vm-specific-tutorials/evm/ibc-hooks"