> For the complete documentation index, see [llms.txt](https://docs.ierc20.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ierc20.com/devs/dinx-evm-beta/add-token.md).

# Add Token

When DINX RPC is enabled, you can add your inscription assets to your asset list .

You can add assets manually by entering the token address in metamask

<div align="center" data-full-width="false"><figure><img src="/files/qAq99ZtVaICVGwwJIrSC" alt="" width="278"><figcaption></figcaption></figure></div>

Also you can programmatically add

```javascript
await window.ethereum.request({
 "method": "wallet_watchAsset",
 "params": {
  type: "ERC20",
  options: {
    address: "0x8ada557a6a1cdf21a0794ab3394e0ab745ca2259",
    symbol: "ETHI",
    decimals: 8,
    image: "https://app.ierc20.com/static/images/logos/ethi.png"
  }
},
});
```

You can also try a one-click add at [`https://explorer.dinx.io`](https://explorer.dinx.io) to add

### Calculation of virtual contract addresses

All current and future protocol tokens can be calculated using DINX's virtual contract address calculation. The principle of the calculation is as follows

```go
package main

import (
	"crypto/sha3"
	"encoding/hex"
	"fmt"
	"strings"
)

// Function to compute keccak256 hash of a string
func keccak256(input string) string {
	hasher := sha3.NewLegacyKeccak256()
	hasher.Write([]byte(input))
	hash := hasher.Sum(nil)
	return hex.EncodeToString(hash)
}

// Function to convert a hash to an Ethereum address
func hashToAddress(hash string) string {
	// Extract the last 20 bytes (40 hex characters)
	last20Bytes := hash[len(hash)-40:]
	return "0x" + strings.ToLower(last20Bytes)
}

func main() {
	// Define the input string
	inputString := "ierc:ethi"

	// Compute the keccak256 hash of the input string
	hash := keccak256(inputString)
	fmt.Println("Keccak256 Hash:", hash)

	// Extract the Ethereum address from the hash
	address := hashToAddress(hash)

	// Output the results
	fmt.Println("Ethereum Address (Lowercase):", address)
}

```

Currently Supported Protocols

<table><thead><tr><th>Protocol</th><th width="186">Support</th><th>Chain</th></tr></thead><tbody><tr><td>IERC20</td><td>yes.</td><td>Ethereum</td></tr><tr><td>BRC20</td><td>Not for a while.</td><td>BTC,Requires wallet association</td></tr><tr><td>Facet</td><td>Not for a while.</td><td>Ethereum</td></tr><tr><td>Bnbs</td><td>Not for a while.</td><td>Bsc</td></tr><tr><td>Sols</td><td>Not for a while.</td><td>Solana,Requires wallet association</td></tr><tr><td>Pols</td><td>Not for a while.</td><td>Polygon</td></tr><tr><td>Avas</td><td>Not for a while.</td><td>Avalanche</td></tr></tbody></table>

### IERC20 Token Contract Mapping (eg.)

<table><thead><tr><th width="246">Tick</th><th>Contract Address</th></tr></thead><tbody><tr><td>ETHI</td><td>0x8ada557a6a1cdf21a0794ab3394e0ab745ca2259</td></tr><tr><td>ETHPI</td><td>0xfca7fdce880d3a328bd03e5c4271b195685c1eaa</td></tr></tbody></table>

Future support for more protocols can be derived from the virtual contract address calculations.

### ERC-20 Standard Interface

**Core Functions:**

1. **`totalSupply()`**: Returns the total number of tokens in existence.
2. **`balanceOf(address account)`**: Provides the token balance of a specific account.
3. **`transfer(address recipient, uint256 amount)`**: Transfers a specified amount of tokens from the caller's account to a recipient.
4. **`approve(address spender, uint256 amount)`**: Authorizes another account (the spender) to spend a certain amount of tokens on behalf of the caller.
5. **`allowance(address owner, address spender)`**: Returns the remaining number of tokens that the spender is permitted to spend on behalf of the owner.
6. **`transferFrom(address sender, address recipient, uint256 amount)`**: Facilitates the transfer of tokens from one account to another, utilizing the allowance mechanism.

**Events:**

* **`Transfer(address indexed from, address indexed to, uint256 value)`**: Emitted when tokens are transferred, including zero-value transfers.
* **`Approval(address indexed owner, address indexed spender, uint256 value)`**: Emitted when an account's allowance for a spender is set by a call to `approve`.

*⚠️ Currently DINX RPC only supports read type operations, not write operations.*