# ERC20 Token

## Endpoint

> **Real Server :** [**https://api.lmtls.io/v1/chain/erc20**](https://api.lmtls.io/v1/chain/erc20)
>
> **Test Server :** [**https://test-api.lmtls.io/v1/chain/erc20**](https://test-api.lmtls.io/v1/chain/erc20)

### mint

Add token issuance. Only the token owner can do this.

#### Parameters

| Name            | Type       | Description                                                                                                                                                                                                       |
| --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| contractAddress | String     | Contract address of token                                                                                                                                                                                         |
| sender          | String     | Sender Address (It's must be owner)                                                                                                                                                                               |
| amount          | BigDecimal | Mint amount of token.                                                                                                                                                                                             |
| tempKey         | String     | tempKey for "mint"                                                                                                                                                                                                |
| hashKey         | String     | hash(tempKey \| secretKey)                                                                                                                                                                                        |
| signature       | String     | sign( hash( contractAddress \| owner \| amount \| tempKey \| hashKey ) ) by sender's privateKey using signData API                                                                                                |
| gasPrice        | BigDecimal | gasPrice                                                                                                                                                                                                          |
| nonce           | BIgInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. |

#### Return Value

| Name          | Type       | Description    |
| ------------- | ---------- | -------------- |
| transactionId | String     | Transaction Id |
| nonce         | BigInteger | nonce Value    |

{% hint style="info" %}
A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus.
{% endhint %}

#### Example

```json
{
    "jsonrpc": "2.0",
    "id": "00456",
    "result": {
        "resultCode": "200",
        "resultMessage": "Success",
        "resultData": {
            "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722...",
            "nonce": 43
        }
    }
}
```

### burn

Burn the initial supply of token. Only the token owner can do this.

#### Parameters

| Name            | Type       | Description                                                                                                                                                                                                       |
| --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| contractAddress | String     | Contract address of token                                                                                                                                                                                         |
| sender          | String     | Sender Address (It's must be owner)                                                                                                                                                                               |
| amount          | BigDecimal | Burn amount of token.                                                                                                                                                                                             |
| tempKey         | String     | tempKey for "burn"                                                                                                                                                                                                |
| hashKey         | String     | hash(tempKey \| secretKey)                                                                                                                                                                                        |
| signature       | String     | sign( hash( contractAddress \| owner \| amount \| tempKey \| hashKey ) ) by sender's privateKey using signData API                                                                                                |
| gasPrice        | BigDecimal | gasPrice                                                                                                                                                                                                          |
| nonce           | BigInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. |

#### Return Value

| Name          | Type       | Description    |
| ------------- | ---------- | -------------- |
| transactionId | String     | Transaction Id |
| nonce         | BigInteger | nonce value    |

{% hint style="info" %}
A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus.
{% endhint %}

#### Example

```json
{
    "jsonrpc": "2.0",
    "id": "00456",
    "result": {
        "resultCode": "200",
        "resultMessage": "Success",
        "resultData": {
            "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722bab2...",
            "nonce": 32
        }
    }
}
```

### getBalance

Return an address Token balance.

#### Parameters

| Name            | Type   | Description                |
| --------------- | ------ | -------------------------- |
| contractAddress | String | Contract address of token. |
| address         | String | Address                    |

#### Return Value

| Name    | Type       | Description               |
| ------- | ---------- | ------------------------- |
| balance | BigDecimal | Token balance of address. |

#### Example

```json
{
    "jsonrpc": "2.0",
    "id": "00456",
    "result": {
        "resultCode": "200",
        "resultMessage": "Success",
        "resultData": {
            "balance": "100.12"
        }
    }
}
```

### transfer

Transfer Token from from-address to to-address.

#### Parameters

| Name            | Type       | Description                                                                                                                                                                                                       |
| --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| contractAddress | String     | Contract address of token                                                                                                                                                                                         |
| sender          | String     | Sender address                                                                                                                                                                                                    |
| toAddress       | String     | To address                                                                                                                                                                                                        |
| amount          | BigDecimal | Transfer amount.                                                                                                                                                                                                  |
| tempKey         | String     | tempKey for "transfer"                                                                                                                                                                                            |
| hashKey         | String     | hash(tempKey \| fromAddress' secretKey)                                                                                                                                                                           |
| signature       | String     | sign( hash( contractAddress \| sender \| toAddress \| amount \| tempKey \| hashKey ) ) by sender's privateKey using signData API                                                                                  |
| gasPrice        | BigDecimal | gasPrice                                                                                                                                                                                                          |
| nonce           | BigInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. |

#### Return Value

| Name          | Type       | Description    |
| ------------- | ---------- | -------------- |
| transactionId | String     | Transaction Id |
| nonce         | BigInteger | nonce value    |

{% hint style="info" %}
A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus.
{% endhint %}

#### Example

```json
{
    "jsonrpc": "2.0",
    "id": "00456",
    "result": {
        "resultCode": "200",
        "resultMessage": "Success",
        "resultData": {
            "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e972...",
            "nonce": 32
        }
    }
}
```

### transferFrom

Transfer Token from from-address to to-address by spender.

#### Parameters

| Name            | Type       | Description                                                                                                                                                                                                       |
| --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| contractAddress | String     | Contract address of token                                                                                                                                                                                         |
| sender          | String     | Sender address (spender)                                                                                                                                                                                          |
| fromAddress     | String     | From address                                                                                                                                                                                                      |
| toAddress       | String     | To address                                                                                                                                                                                                        |
| amount          | BigDecimal | Transfer amount.                                                                                                                                                                                                  |
| tempKey         | String     | tempKey for "transfer"                                                                                                                                                                                            |
| hashKey         | String     | hash(tempKey \| fromAddress' secretKey)                                                                                                                                                                           |
| signature       | String     | sign( hash( contractAddress \| sender \| fromAddress \| toAddress \| amount \| tempKey \| hashKey ) ) by sender's privateKey using signData API                                                                   |
| gasPrice        | BigDecimal | gasPrice                                                                                                                                                                                                          |
| nonce           | BigInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. |

#### Return Value

| Name          | Type       | Description    |
| ------------- | ---------- | -------------- |
| transactionId | String     | Transaction Id |
| nonce         | BigInteger | nonce value    |

{% hint style="info" %}
A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus.
{% endhint %}

#### Example

```json
{
    "jsonrpc": "2.0",
    "id": "00456",
    "result": {
        "resultCode": "200",
        "resultMessage": "Success",
        "resultData": {
            "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722b...",
            "nonce": 32
        }
    }
}
```

### approve

Approve Token from owner-address to spender-address.

#### Parameters

| Name            | Type        | Description                                                                                                                                                                                                       |
| --------------- | ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| contractAddress | String      | Contract address of token                                                                                                                                                                                         |
| sender          | String      | Sender address                                                                                                                                                                                                    |
| spender         | String      | Spender address                                                                                                                                                                                                   |
| amount          | BigDecimal  | Approve amount.                                                                                                                                                                                                   |
| tempKey         | String      | tempKey for "approve"                                                                                                                                                                                             |
| hashKey         | String      | hash(tempKey \| fromAddress' secretKey)                                                                                                                                                                           |
| signature       | String      | sign( hash ( contractAddress \| sender \| spender \| amount \| tempKey \| hashKey ) ) by sender's privateKey using signData API                                                                                   |
| gasPrice        | BigDecimal  | gasPrice                                                                                                                                                                                                          |
| nonce           | BingInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. |

#### Return Value

| Name          | Type       | Description    |
| ------------- | ---------- | -------------- |
| transactionId | String     | Transaction Id |
| nonce         | BigInteger | nonce value    |

{% hint style="info" %}
A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus.
{% endhint %}

#### Example

```json
{
    "jsonrpc": "2.0",
    "id": "00456",
    "result": {
        "resultCode": "200",
        "resultMessage": "Success",
        "resultData": {
            "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722bab2...",
            "nonce": 32
        }
    }
}
```

### getAllowance

Returns an allowed Token amount from owner address to to spender address.

#### Parameters

| Name            | Type   | Description                |
| --------------- | ------ | -------------------------- |
| contractAddress | String | Contract address of token. |
| address         | String | Allower address            |
| spender         | String | Spender address            |

#### Return Value

| Name   | Type       | Description           |
| ------ | ---------- | --------------------- |
| amount | BigDecimal | Allowed Token amount. |

#### Example

```json
{
    "jsonrpc": "2.0",
    "id": "00456",
    "result": {
        "resultCode": "200",
        "resultMessage": "Success",
        "resultData": {
            "amount": "100.12"
        }
    }
}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.lmtls.io/lmtls-tech-summary/chain-api/api-references/erc20-token.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.