> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# wallet/exchangeinject | TRON

> TRON API method that adds liquidity to an existing exchange trading pair on the TRON decentralized exchange. Returns a transaction object containing:.

TRON API method that adds liquidity to an existing exchange trading pair on the TRON decentralized exchange.

## Parameters

* `owner_address` — the address providing liquidity (base58 with `visible: true`, or hex with `visible: false`).
* `exchange_id` — unique identifier of the exchange pair to add liquidity to.
* `token_id` — TRC10 token ID; use `_` to denote TRX.
* `quant` — integer amount to add (token base units; if TRX, specify in sun).
* `permission_id` — optional permission ID for multi‑signature accounts.

## Response

Returns a transaction object containing:

* `txID` — unique transaction identifier
* `raw_data` — raw transaction data including contract details
* `raw_data_hex` — hexadecimal representation of raw transaction data

## Use case

The `wallet/exchangeinject` method is used for:

* Adding liquidity to existing trading pairs to earn trading fees
* Increasing the depth and stability of token markets
* Participating in liquidity mining and yield farming programs
* Providing capital to support decentralized exchange operations

## curl example

```shell Shell theme={"system"}
curl --request POST \
  --url 'https://tron-mainnet.core.chainstack.com/95e61622bf6a8af293978377718e3b77/wallet/exchangeinject' \
  --header 'Content-Type: application/json' \
  --data '{
  "owner_address": "TLyqzVGLV1srkB7dToTAEqgDSfPtXRJZYH",
  "exchange_id": 1,
  "token_id": "1000001",
  "quant": 500000000000,
  "visible": true
}'
```

<Info>
  * balances must be integers (do not quote numbers). When injecting TRX (using `token_id: "_"`), provide `quant` in sun (1 TRX = 1,000,000 sun).
  * the call returns an unsigned transaction; sign and broadcast it to finalize.
  * on mainnet, the exchange must exist, the token must match the pair, and the account must hold sufficient balance.
</Info>


## OpenAPI

````yaml openapi/tron_node_api/exchangeinject.json post /95e61622bf6a8af293978377718e3b77/wallet/exchangeinject
openapi: 3.0.0
info:
  title: TRON API
  version: 1.0.0
servers:
  - url: https://tron-mainnet.core.chainstack.com
security: []
paths:
  /95e61622bf6a8af293978377718e3b77/wallet/exchangeinject:
    post:
      summary: Add liquidity to an exchange pair
      description: >-
        Adds liquidity to an existing exchange trading pair on the TRON
        decentralized exchange
      operationId: exchangeInject
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - owner_address
                - exchange_id
                - token_id
                - quant
              properties:
                owner_address:
                  type: string
                  description: The address providing liquidity to the exchange pair
                exchange_id:
                  type: integer
                  description: Unique identifier of the exchange pair to add liquidity to
                token_id:
                  type: string
                  description: >-
                    Token ID being added to the liquidity pool. Use '_' to
                    denote TRX.
                quant:
                  type: integer
                  description: >-
                    Amount to add as an integer (token base units; if TRX,
                    specify in sun)
                permission_id:
                  type: integer
                  description: Optional permission ID for multi-signature accounts
                visible:
                  type: boolean
                  description: Whether to return human-readable addresses
                  default: false
            examples:
              default:
                summary: Add TRC10 tokens to liquidity pool
                value:
                  owner_address: TLyqzVGLV1srkB7dToTAEqgDSfPtXRJZYH
                  exchange_id: 1
                  token_id: '1000001'
                  quant: 500000000000
                  visible: true
      responses:
        '200':
          description: Successful response with transaction details
          content:
            application/json:
              schema:
                type: object
                properties:
                  txID:
                    type: string
                    description: Unique transaction identifier
                  raw_data:
                    type: object
                    description: Raw transaction data including contract details
                    properties:
                      contract:
                        type: array
                        items:
                          type: object
                          properties:
                            parameter:
                              type: object
                              properties:
                                value:
                                  type: object
                                  properties:
                                    owner_address:
                                      type: string
                                    exchange_id:
                                      type: integer
                                    token_id:
                                      type: string
                                    quant:
                                      type: string
                                type_url:
                                  type: string
                            type:
                              type: string
                      ref_block_bytes:
                        type: string
                      ref_block_hash:
                        type: string
                      expiration:
                        type: integer
                      timestamp:
                        type: integer
                  raw_data_hex:
                    type: string
                    description: Hexadecimal representation of raw transaction data
              examples:
                success:
                  summary: Successful response
                  value:
                    txID: >-
                      a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2
                    raw_data:
                      contract:
                        - parameter:
                            value:
                              owner_address: TLyqzVGLV1srkB7dToTAEqgDSfPtXRJZYH
                              exchange_id: 1
                              token_id: '1000001'
                              quant: '500000000000'
                            type_url: >-
                              type.googleapis.com/protocol.ExchangeInjectContract
                          type: ExchangeInjectContract
                      ref_block_bytes: ab91
                      ref_block_hash: f5d4c3b2a2
                      expiration: 1672531320000
                      timestamp: 1672531260000
                    raw_data_hex: >-
                      0a02ab911220f5d4c3b2a240a0c9e2f6e30f5a68081112620a32747970652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e45786368616e6765496e6a656374436f6e747261637412280a154c7971797a56474c5631737266b7dd4afc8eagg615349220831310313530303031
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                type: object
                properties:
                  Error:
                    type: string
              examples:
                error:
                  summary: Error response
                  value:
                    Error: Exchange not found or insufficient token balance

````