​
Introduction

Tokens in the swap.coffee platform can have associated staking pools. The staking pool information is represented by the stakingPool object, which contains details about the staking pool, such as the address, name, APY, and other relevant information. Currently, we collect staking information for the following tokens: The API located at https://tokens.swap.coffee/docs For example, for stTON (Bemo), the staking pool object looks like this: 
{
  "address": "0:cd872fa7c5816052acdf5332260443faec9aacc8c21cca4d92e7f47034d11892",
  "name": "Staked TON",
  "symbol": "stTON",
  "decimals": 9,
  "price_usd": 3.820352,
  "price_change_24h": -0.09,
  "tvl": 917140.097477,
  "holders_count": 18950,
  "staking_pool": {
    "id": 1,
    "address": "0:cd872fa7c5816052acdf5332260443faec9aacc8c21cca4d92e7f47034d11892",
    "name": "bemo",
    "url": "https://app.bemo.fi/",
    "description": "bemo is a non-custodial liquid staking protocol built on The Open Network (TON) blockchain. It is the first liquid staking application on TON that allows you to stake native TON tokens and, in return, get stTON tokens which you can use freely in DeFi.",
    "minimum_deposit_ton": 1,
    "apy": 3.83,
    "exchange_rate": 1.0654336036660292,
    "cycle_end": 1742472000
  }
}

​
Fields Description

FieldTypeRequiredDescription
idintegerYesUnique identifier of the staking pool
addressstringYesThe blockchain address of the staking pool contract
namestringYesThe name of the staking pool
urlstringNoURL to the staking pool’s website or documentation
descriptionstringNoA description of the staking pool, its features, and benefits
minimum_deposit_tonnumberNoThe minimum amount of TON that can be staked in this pool
apynumberNoAnnual Percentage Yield - the expected yearly return from staking in this pool
exchange_ratenumberYesThe exchange rate between the staked token and the received token (e.g., TON to liquid staking token)
cycle_endintegerNoUnix timestamp indicating when the current staking cycle ends

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Transaction Builder API

swap.coffee provides API endpoints for building stake and unstake transactions for staked tokens. These functionality eliminate the need for users to manually construct transactions.

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Stake Transactions

To build a transaction for staking TON tokens, use the following endpoint: 
POST https://backend.swap.coffee/v2/stake/ton/transaction
This endpoint returns a pre-built transaction for the given stake request. The transaction must be signed and sent by the sender via their wallet.

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Request Parameters

The stake transaction endpoint requires a JSON request body with the following parameters:
FieldTypeRequiredDescription
sender_addressstringYesThe address of the sender who will sign and send the transaction
amountnumberYesThe amount of TON tokens to stake
token_addressstringYesThe address of the staking pool token (e.g., stTON, hTON, tsTON)
referral_namestringNoOptional referral name for tracking purposes

​
Example Request

curl -X POST https://backend.swap.coffee/v2/stake/ton/transaction \
  -H "Content-Type: application/json" \
  -d '{
    "sender_address": "UQCNTO0Nh0Z7QNyRW1BLWfk08f2dAOw4izrx9sO6OUPg4DoV",
    "amount": 0.05,
    "token_address": "EQDY6PMeMbQSz7dltNN4RRTIxyuBJX4dQESOy8cWR2tUgBxH"
  }'

​
Response Structure

The endpoint returns a response with the following structure:
FieldTypeRequiredDescription
payload_cellstring (base64)YesBase64-encoded cell that is treated as a payload field in TonConnect transaction
addressstringYesThe address of the contract to interact with
valuestring (int128)YesAmount of nanotons to be sent with the transaction
state_initstring (base64)NoOptional base64-encoded cell that is treated as a stateInit field in TonConnect transaction

​
Example Response

{
  "payload_cell": "te6cckEBAQEAcQAA3v8AIN0gggFMl7ohggEznLqxn3Gw7UTQ0x/THzHXC//jBOCk8mCDCNcYINMf0x/TH/gjE7vyY+1E0NMf0x/T/9FRMrryoVFEuvKiBPkBVBBV+RDyo/gAkyDXSpbTB9QC+wDo0QGkyMsfyx/L/8ntVBC9ba0=",
  "address": "EQCM3B12QK1e4yZSf8GtBRT0aLMNyEsBc_DhVfRRtOEffLez",
  "value": "100000000"
}

​
Unstake Transactions

To build a transaction for unstaking TON tokens, use the following endpoint: 
POST https://backend.swap.coffee/v2/unstake/ton/transaction
This endpoint returns a pre-built transaction for the given unstake request. The transaction must be signed and sent by the sender via their wallet.

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Request Parameters

The unstake transaction endpoint requires a JSON request body with the following parameters:
FieldTypeRequiredDescription
sender_addressstringYesThe address of the sender who will sign and send the transaction
amountnumberYesThe amount of staked tokens to unstake
token_addressstringYesThe address of the staking pool token (e.g., stTON, hTON, tsTON)
referral_namestringNoOptional referral name for tracking purposes

​
Example Request

curl -X POST https://backend.swap.coffee/v2/unstake/ton/transaction \
  -H "Content-Type: application/json" \
  -d '{
    "sender_address": "UQCNTO0Nh0Z7QNyRW1BLWfk08f2dAOw4izrx9sO6OUPg4DoV",
    "amount": 0.05,
    "token_address": "EQDY6PMeMbQSz7dltNN4RRTIxyuBJX4dQESOy8cWR2tUgBxH"
  }'

​
Response Structure

The endpoint returns a response with the following structure:
FieldTypeRequiredDescription
payload_cellstring (base64)YesBase64-encoded cell that is treated as a payload field in TonConnect transaction
addressstringYesThe address of the contract to interact with
valuestring (int128)YesAmount of nanotons to be sent with the transaction
state_initstring (base64)NoOptional base64-encoded cell that is treated as a stateInit field in TonConnect transaction

​
Example Response

{
  "payload_cell": "te6cckEBAQEAcQAA3v8AIN0gggFMl7ohggEznLqxn3Gw7UTQ0x/THzHXC//jBOCk8mCDCNcYINMf0x/TH/gjE7vyY+1E0NMf0x/T/9FRMrryoVFEuvKiBPkBVBBV+RDyo/gAkyDXSpbTB9QC+wDo0QGkyMsfyx/L/8ntVBC9ba0=",
  "address": "EQCM3B12QK1e4yZSf8GtBRT0aLMNyEsBc_DhVfRRtOEffLez",
  "value": "100000000"
}

​
Using the built message with TonConnect

This transaction information can be used with wallet providers like TonConnect to execute the stake or unstake operation. Here’s an example of how to use the response with TonConnect: 
const transaction = {
  validUntil: Math.floor(Date.now() / 1000) + 360, // 5 minutes from now
  messages: [
    {
      address: response.address,
      amount: response.value,
      payload: response.payload_cell
    }
  ]
};

// Send the transaction using TonConnect
tonConnectUi.sendTransaction(transaction);