# Near (NEAR & Near Token)

## Sign Transaction

The D'CENT Web SDK provides functions for signing transaction of coins.

### **getNearSignedTransaction()**

#### Supported Coin Type

* Near(NEAR)
* Near Token

#### Parameters 

* unsignedTx: unsigned hexadecimal tx [Near Docs](https://docs.near.org/ko/tools/near-api-js/reference/modules/transaction#signtransaction)
* path: key path, wallet sign with that private key with a given key path (BIP32 ex) "m/44'/397'/0'").
* fee: fee, It is fee that wallet displays on the screen.
* symbol: symbol, It is a symbol that the wallet displays on the screen.
* decimals: near or near token's decimals.
* optionParams: hexadecimal value of the token method type is used only in near token.
  * '02' : Function call(ft\_transfer)
  * '~~04' : Stake~~ (**The method will be supported later.)**
  * ~~'08' : Delegate~~ (**The method will be supported later)**

#### Requirements

* `D'CENT Bridge` version 1.5.1 or higher is required.
* D'CENT Biometric Wallet version 2.24.0 or higher is required.
  * near token: version 2.27.1 or higher is required.

#### Useage 

```javascript
const {connect, utils, providers} = require('near-api-js')
const nearTransaction = require('near-api-js/lib/transaction')
const nearSerialize = require('borsh')

const connectionConfig = {
  networkId: "mainnet",
  nodeUrl: "https://rpc.mainnet.near.org",
};
const nearConnection = await connect(connectionConfig);

let nonceOfAccessKey = await nearConnection.connection.provider.query({
    request_type: 'view_access_key_list',
    account_id: address,
    finality: 'final'
  })

const blockHash = await nearConnection.connection.provider.block({ finality: 'final' }).then(block => {
    const encodedBlockHash = block.header.hash
    return Buffer.from(bs58Lib.decode(encodedBlockHash))
  })
const nonce = ++nonceOfAccessKey;
const publicKey = utils.PublicKey.from(bs58Lib.encode(Buffer.from(address, 'hex')))
var actions = [nearTransaction.transfer(utils.parseNearAmount(BigNumber(amount).toString(10)).replace(',', ''))];

let transaction = new nearTransaction.SignedTransaction({
    transaction: {
      signerId: address,
      publicKey: publicKey,
      nonce: nonce,
      receiverId: toAddr,
      actions: actions,
      blockHash: blockHash 
    },
    signature: new nearTransaction.Signature({ 
      keyType: transaction.publicKey.keyType,
    })
  })
let unsignedTx = nearSerialize.serialize(nearTransaction.SCHEMA, transaction)

const transactionJson = {
    coinType: DcentWebConnector.coinType.NEAR,
    sigHash: unsignedTx.toString('hex'),
    path: `m/44'/397'/0'`,
    decimals, // 24
    fee, 
    symbol: 'NEAR',
    }

var result
try {
    result = await DcentWebConnector.getNearSignedTransaction(transactionJson);  
} catch (e) {
    console.log(e)
    result = e
}
```

#### Returned response object

```json
{
    "header": {
        "version": "1.0",
        "response_from": "near",
        "status": "success"
    },
    "body": {
        "command": "transaction",
        "parameter": {
            "signed_tx": "0x31aa13b5e04cb6fc6381ea0520bf7f6727ebdb6e96cd7ca8625bb3e3dd36cf0e2cee4ece13aa9f7ddc09ee10c74aa00af954201829d8016317f10f5a921dcc0d"
        }
    }
}
```


---

# 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://dev-docs.dcentwallet.com/dcent-biometric-wallet-for-pc/dcent-web-connector/near-near-and-near-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.