> Solana Developer Platform docs, served as Markdown. The [docs index](https://platform-beta.solana.com/docs.md) lists every page and [llms.txt](https://platform-beta.solana.com/docs/ai/llms.txt) the key ones; [SKILL.md](https://platform-beta.solana.com/SKILL.md) has the rules for building on SDP.

# Build a withdrawal request transaction

Builds an unsigned withdrawal request transaction for a position, for the customer's wallet to sign.

> **Earn is under active development.** Features, API endpoints, and docs may change.

`POST /v1/earn/external-wallet/withdrawal-request-transactions`

A solver queue request escrows shares; an operator redemption converts shares into an intermediate token that the operator settles later. Neither transaction pays the customer. Save the `withdrawalRequestId` the submit returns and track the request until it is fulfilled, canceled, or failed.

Requires an [API key](/docs/developing-with-sdp/authentication) with the `earn.execute` action.

## Headers

- **`x-project-id`** · `string` · min length 1 · example `prj_example`

  Required for dashboard sessions. API keys use their assigned project.

## Request body

`application/json` · required

Build a keyed asynchronous withdrawal request. A solver request escrows shares; an operator redemption converts them into the provider's intermediate token, or delegates intermediate the owner already holds. Neither action pays assets.

Any of:

- **object**

  - **`positionId`** · `string` · required · min length 1 · max length 128 · example `earn_position_2f8b6b04-7147-487e-b760-b1caa4fbcb8b`

    The position's ID, from the positions list or the deposit submit response.

  - **`shares`** · `string` · required · max length 128 · pattern `^(?=.*[1-9])\d+(\.\d+)?$` · example `10`

    Shares to place in the withdrawal request, in share units.

  - **`mechanism`** · `string` · always `solverQueue`

    Selects the solver queue, which is also the default when omitted. Operator redemptions must set `mechanism` explicitly.

  - **`discountBps`** · `integer` · required · min 0 · max 10000 · example `25`

    Discount offered to a solver, in basis points. It must stay inside the live queueAsset minimum and maximum.

  - **`deadlineSeconds`** · `integer` · required · greater than 0 · max 7776000 · example `86400`

    Solver window after maturity, in seconds. It must stay inside the live queueAsset minimum and maximum.

  - **`feePayer`** · `string` · min length 32 · max length 44 · pattern `^[1-9A-HJ-NP-Za-km-z]{32,44}$` · example `3nMFwZXwY1s1M5s8vYAHqd4wGs4iSxXE4LRoUMMYqEgF`

    Pay for this transaction from a wallet your backend controls instead of the customer's. The named address becomes the fee payer: it pays the network fee, funds any share-account rent, and must sign alongside the customer. Co-sign on your backend before you submit. The build returns 400, naming the fee payer, when it cannot pay. Sending the customer's own address keeps the default: the customer pays and signs alone.

- **object**

  - **`positionId`** · `string` · required · min length 1 · max length 128 · example `earn_position_2f8b6b04-7147-487e-b760-b1caa4fbcb8b`

    The position's ID, from the positions list or the deposit submit response.

  - **`shares`** · `string` · required · max length 128 · pattern `^(?=.*[1-9])\d+(\.\d+)?$` · example `10`

    Shares to place in the withdrawal request, in share units.

  - **`mechanism`** · `string` · required · always `operatorRedemption`

    Selects an operator redemption, which takes no solver discount or deadline.

  - **`feePayer`** · `string` · min length 32 · max length 44 · pattern `^[1-9A-HJ-NP-Za-km-z]{32,44}$` · example `3nMFwZXwY1s1M5s8vYAHqd4wGs4iSxXE4LRoUMMYqEgF`

    Pay for this transaction from a wallet your backend controls instead of the customer's. The named address becomes the fee payer: it pays the network fee, funds any share-account rent, and must sign alongside the customer. Co-sign on your backend before you submit. The build returns 400, naming the fee payer, when it cannot pay. Sending the customer's own address keeps the default: the customer pays and signs alone.

- **object**

  - **`positionId`** · `string` · required · min length 1 · max length 128 · example `earn_position_2f8b6b04-7147-487e-b760-b1caa4fbcb8b`

    The position's ID, from the positions list or the deposit submit response.

  - **`intermediateAmount`** · `string` · required · max length 128 · pattern `^(?=.*[1-9])\d+(\.\d+)?$` · example `2000`

    Intermediate token the owner already holds outside any request (such as a cancelled request's wYLDS) to redeem at par, in that token's units. Send instead of `shares`, never with it.

  - **`mechanism`** · `string` · required · always `operatorRedemption`

    Selects an operator redemption, which takes no solver discount or deadline.

  - **`feePayer`** · `string` · min length 32 · max length 44 · pattern `^[1-9A-HJ-NP-Za-km-z]{32,44}$` · example `3nMFwZXwY1s1M5s8vYAHqd4wGs4iSxXE4LRoUMMYqEgF`

    Pay for this transaction from a wallet your backend controls instead of the customer's. The named address becomes the fee payer: it pays the network fee, funds any share-account rent, and must sign alongside the customer. Co-sign on your backend before you submit. The build returns 400, naming the fee payer, when it cannot pay. Sending the customer's own address keeps the default: the customer pays and signs alone.

## Responses

- **`200`** Unsigned withdrawal request transaction

  - **`data`** · `object` · required

    - **`transaction`** · `object` · required

      Any of:

      - **mechanism: "solverQueue"**

        - **`transactionId`** · `string` · required · example `earn_external_wallet_transaction_e7a88258-1d19-48f3-8d0e-81fefa4bf3b3`

        - **`transaction`** · `string` · required

          Base64 wire bytes of the unsigned transaction. Add every required signature without changing the message, then submit through SDP. The blockhash bounds when the network can first accept it; retain the original signed bytes for recovery.

        - **`lastValidBlockHeight`** · `string` · required · example `361186610`

          Last block height at which the network can first accept this transaction. This is a block height, not a slot or timestamp.

        - **`sponsored`** · `boolean` · required · example `false`

          Always false: SDP does not pay an external wallet's fees. The customer's wallet pays, or the `feePayer` you name.

        - **`ownerAddress`** · `string` · required · example `9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM`

          The customer's wallet address.

        - **`feePayer`** · `string` · example `3nMFwZXwY1s1M5s8vYAHqd4wGs4iSxXE4LRoUMMYqEgF`

          The `feePayer` your build request named. When present, the transaction needs the fee payer's signature as well as the customer's: co-sign on your backend before you submit, or the submit refuses it. When omitted, the customer signs alone and pays the fee.

        - **`provider`** · `string` · required · example `kamino`

        - **`providerReference`** · `string` · required · example `7uib8xGAwkaPz4ZGCA6t8sSEid5Yp9ty13PHUweTypx`

          The strategy's onchain address at the provider. It identifies the instrument; never send funds to it.

        - **`tokenMint`** · `string` · required · example `4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU`

        - **`shareMint`** · `string` · required · example `hXm2xSRF5PLKGMrTvAWqKhR76MuJX5dAabeSChkjqu2`

        - **`positionId`** · `string` · required · example `earn_position_2f8b6b04-7147-487e-b760-b1caa4fbcb8b`

        - **`action`** · `string` · required · always `request`

        - **`mechanism`** · `string` · required · always `solverQueue`

        - **`requestAddress`** · `string` · required

          Provider request account address.

        - **`shares`** · `string` · required · max length 128 · pattern `^(?=.*[1-9])\d+(\.\d+)?$` · example `25`

          Positive decimal string with at least one non-zero digit; never a float.

        - **`assets`** · `string` · required · max length 128 · pattern `^(?=.*[1-9])\d+(\.\d+)?$` · example `25`

          Positive decimal string with at least one non-zero digit; never a float.

        - **`discountBps`** · `integer` · required · min 0 · max 10000

        - **`maturityTimestamp`** · `string` · required · pattern `^\d+$`

        - **`deadlineTimestamp`** · `string` · required · pattern `^\d+$`

      - **mechanism: "operatorRedemption"**

        - **`transactionId`** · `string` · required · example `earn_external_wallet_transaction_e7a88258-1d19-48f3-8d0e-81fefa4bf3b3`

        - **`transaction`** · `string` · required

          Base64 wire bytes of the unsigned transaction. Add every required signature without changing the message, then submit through SDP. The blockhash bounds when the network can first accept it; retain the original signed bytes for recovery.

        - **`lastValidBlockHeight`** · `string` · required · example `361186610`

          Last block height at which the network can first accept this transaction. This is a block height, not a slot or timestamp.

        - **`sponsored`** · `boolean` · required · example `false`

          Always false: SDP does not pay an external wallet's fees. The customer's wallet pays, or the `feePayer` you name.

        - **`ownerAddress`** · `string` · required · example `9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM`

          The customer's wallet address.

        - **`feePayer`** · `string` · example `3nMFwZXwY1s1M5s8vYAHqd4wGs4iSxXE4LRoUMMYqEgF`

          The `feePayer` your build request named. When present, the transaction needs the fee payer's signature as well as the customer's: co-sign on your backend before you submit, or the submit refuses it. When omitted, the customer signs alone and pays the fee.

        - **`provider`** · `string` · required · example `kamino`

        - **`providerReference`** · `string` · required · example `7uib8xGAwkaPz4ZGCA6t8sSEid5Yp9ty13PHUweTypx`

          The strategy's onchain address at the provider. It identifies the instrument; never send funds to it.

        - **`tokenMint`** · `string` · required · example `4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU`

        - **`shareMint`** · `string` · required · example `hXm2xSRF5PLKGMrTvAWqKhR76MuJX5dAabeSChkjqu2`

        - **`positionId`** · `string` · required · example `earn_position_2f8b6b04-7147-487e-b760-b1caa4fbcb8b`

        - **`action`** · `string` · required · always `request`

        - **`mechanism`** · `string` · required · always `operatorRedemption`

        - **`requestAddress`** · `string` · required

          Provider request account address.

        - **`shares`** · `string` · required · max length 128 · pattern `^\d+(\.\d+)?$` · example `10`

          Position shares the request burns, in share units; "0" when it redeems intermediate the owner already holds.

        - **`assets`** · `string` · required · max length 128 · pattern `^(?=.*[1-9])\d+(\.\d+)?$` · example `25`

          Positive decimal string with at least one non-zero digit; never a float.

        - **`intermediateMint`** · `string` · required · min length 32 · max length 44 · pattern `^[1-9A-HJ-NP-Za-km-z]{32,44}$` · example `2b1kV6DkPAnxd5ixfnxCpjxmKwqjjaYmCZfHsFu24GXo`

          Base58 Solana mint address.

        - **`intermediateAmount`** · `string` · required · max length 128 · pattern `^(?=.*[1-9])\d+(\.\d+)?$` · example `25`

          Positive decimal string with at least one non-zero digit; never a float.

  - **`meta`** · `object` · required

    Response metadata.

    - **`requestId`** · `string` · required · min length 1 · example `req_example`

      Request identifier for tracing.

    - **`timestamp`** · `string` · required · format `date-time` · example `2025-01-01T00:00:00.000Z`

      ISO 8601 timestamp.

- **`400`** Bad Request

  - **`error`** · `object` · required

    Standard error payload.

    - **`code`** · `string` · required

      Machine-readable error code.

    - **`message`** · `string` · required

      Human-readable error message.

    - **`details`** · `object`

      Optional error details for debugging.

      - **`*`** · `any`

  - **`meta`** · `object`

    - **`requestId`** · `string` · min length 1 · example `req_example`

      Request identifier for tracing.

- **`401`** Unauthorized

  Same fields as `400`.

- **`403`** Forbidden. Requires the `earn.execute` action: an API key must hold it (a module's `manage` or `execute` also covers its `read`), and a signed-in member's organization role must include it. Without it the error is INSUFFICIENT_PERMISSIONS and `error.details.action` names the action. Any other 403 names its own reason.

  Same fields as `400`.

- **`404`** Not Found

  Same fields as `400`.

- **`409`** Conflict

  Same fields as `400`.

- **`429`** Too Many Requests

  Same fields as `400`.

- **`500`** Internal Server Error

  Same fields as `400`.

- **`501`** The provider does not support this operation.

  - **`error`** · `object` · required

    Standard error payload.

    - **`code`** · `string` · required

    - **`message`** · `string` · required

      Human-readable error message.

    - **`details`** · `object`

      Optional error details for debugging.

      - **`*`** · `any`

  - **`meta`** · `object`

    - **`requestId`** · `string` · min length 1 · example `req_example`

      Request identifier for tracing.

- **`503`** Service Unavailable

  Same fields as `400`.

## Example request

```bash tab="cURL"
curl -X POST 'https://api.solana.com/v1/earn/external-wallet/withdrawal-request-transactions' \
  -H "Authorization: Bearer $SDP_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "positionId": "earn_position_0432ffeb-c574-4b11-80dc-a09defb68fcc",
    "mechanism": "solverQueue",
    "shares": "15",
    "discountBps": 10,
    "deadlineSeconds": 60
  }'
```

```ts tab="TypeScript"
const res = await fetch("https://api.solana.com/v1/earn/external-wallet/withdrawal-request-transactions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.SDP_API_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "positionId": "earn_position_0432ffeb-c574-4b11-80dc-a09defb68fcc",
    "mechanism": "solverQueue",
    "shares": "15",
    "discountBps": 10,
    "deadlineSeconds": 60
  })
});
```

```python tab="Python"
import os, requests

r = requests.post("https://api.solana.com/v1/earn/external-wallet/withdrawal-request-transactions",
  headers={"Authorization": f"Bearer {os.environ['SDP_API_KEY']}"},
  json={
    "positionId": "earn_position_0432ffeb-c574-4b11-80dc-a09defb68fcc",
    "mechanism": "solverQueue",
    "shares": "15",
    "discountBps": 10,
    "deadlineSeconds": 60
  })
```

## Example responses

```json tab="200"
{
  "data": {
    "transaction": {
      "transactionId": "earn_external_wallet_withdrawal_request_transaction_54c50679-1b52-494d-84fa-106df66452ff",
      "transaction": "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
      "lastValidBlockHeight": "361187340",
      "sponsored": false,
      "ownerAddress": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM",
      "provider": "veda",
      "providerReference": "3wbKP5UGLT7gAZBAsLjvPC1NbfnWKtT3Dq7cniMWkzfU",
      "tokenMint": "4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU",
      "shareMint": "CdV7pjj6WANsdasKsBvdKAn7qJL7cQ2Q3CJMBEe13WAV",
      "positionId": "earn_position_0432ffeb-c574-4b11-80dc-a09defb68fcc",
      "requestAddress": "DKw4pYcvXNLs91RssedGFznWRpbvPttp2AAwNCG7fQRz",
      "action": "request",
      "mechanism": "solverQueue",
      "shares": "15",
      "assets": "14.985",
      "discountBps": 10,
      "maturityTimestamp": "1793991049",
      "deadlineTimestamp": "1793991109"
    }
  },
  "meta": {
    "requestId": "req_example",
    "timestamp": "2025-01-01T00:00:00.000Z"
  }
}
```

```json tab="403"
{
  "error": {
    "code": "INSUFFICIENT_PERMISSIONS",
    "message": "Missing action: earn.execute",
    "details": {
      "action": "earn.execute"
    }
  },
  "meta": {
    "requestId": "req_example"
  }
}
```

Error responses use the [standard error shape](/docs/reference/conventions/errors).