Document new associate methods

pages/dev-interoperability/precompiles/addr.mdx

@@ -11,6 +11,64 @@ Association takes place when the wallet first signs and broadcasts any transacti
 
 ## Functions
 
+### Transactions
+- `associate`: Associates an EVM address with it's corresponding Cosmos address on chain using a signature. For association via a pubkey, use `associatePubKey` instead.
+  ```solidity
+    /// Associates an account given it's signature of any custom message.
+    /// @param v The v component of the signature.
+    /// @param r The r component of the signature.
+    /// @param s The s component of the signature.
+    /// @param customMessage A custom message that was signed by the address to be associated.
+    /// @return Whether the association was successfully executed.
+        function associate(
+        string memory v,
+        string memory r,
+        string memory s,
+        string memory customMessage
+    ) external returns (string memory seiAddr, address evmAddr);
+  ```
+
+  Example use:
+  ```ts
+  const message = `This is a test message.`;
+
+  // Get the hex encoded signature
+  const signature = await signMessageAsync({message})
+
+  // Get the v, r, s values
+  const { r, s } = secp256k1.Signature.fromCompact(signature.slice(2, 130));
+  const v = hexToNumber(`0x${signature.slice(130)}`);
+
+  // Append the Ethereum Signed Message prefix to the signed message.
+  // This prefix is automatically appended to the message by `sign` methods that use EDCSA, so we need to append this too.
+  const messageLength = Buffer.from(message, 'utf8').length;
+  const customMessage = `\x19Ethereum Signed Message:\n${messageLength}${message}`;
+  const request = {
+      r: numberToHex(r),
+      s: numberToHex(s),
+      v: numberToHex(v - 27),
+      custom_message: customMessage
+  };
+  await contract.associate(request.v, request.r, request.s, request.custom_message)
+  ``` 
+
+- `sendNative`: Enables a user to send native Sei to another user.
+  ```solidity
+    /// Associates an account given it's compressed pubkey in hex format (excluding the '0x')
+    /// @param pubKeyHex The Hex-encoded compressed pubkey of the account to be associated, excluding the '0x'
+    /// @return Whether the association was successfully executed.
+    function associatePubKey(
+        string memory pubKeyHex
+    ) external returns (string memory seiAddr, address evmAddr);
+  ```
+  Example use:
+  ```ts
+  // Create a sample ethers wallet
+  const newWallet = ethers.Wallet.createRandom();
+  const pkWithout0x = newWallet.publicKey.slice(2)
+  await contract.associatePubKey(pkWithout0x)
+  ``` 
+
 ### Queries
 - `getSeiAddr`: Gets the corresponding Sei Address from the given EVM Address
   ```solidity