# Approve Milestone

### **Headers**

<table><thead><tr><th width="366">Name</th><th>Value</th></tr></thead><tbody><tr><td>Content-Type</td><td><code>application/json</code></td></tr><tr><td>x-api-key</td><td><code>&#x3C;token></code></td></tr></tbody></table>

### Open API

## POST /escrow/single-release/approve-milestone

>

```json
{"openapi":"3.0.0","info":{"title":"Trustless Work API","version":"1.0"},"security":[{}],"paths":{"/escrow/single-release/approve-milestone":{"post":{"operationId":"SingleReleaseController_approveMilestone","parameters":[],"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ApproveMilestone"}}}},"responses":{"201":{"description":"This endpoint returns an unsigned transaction in XDR format. This XDR is then used to sign the transaction using the “/helper/send-transaction” endpoint.","content":{"application/json":{}}},"400":{"description":"Bad request"},"401":{"description":"Unauthorized access"},"429":{"description":"Too Many Requests"},"500":{"description":"Possible errors:\n- Escrow not found\n- Only the approver can change milestone flag\n- You cannot approve a milestone that has already been approved previously\n- The milestone status cannot be empty\n- Escrow initialized without milestone\n- Invalid milestone index\n- An unexpected error occurred","content":{"application/json":{}}}},"tags":["Single Release"]}}},"components":{"schemas":{"ApproveMilestone":{"type":"object","properties":{"contractId":{"type":"string","description":"ID (address) that identifies the escrow contract"},"milestoneIndex":{"type":"string","description":"Position that identifies the milestone within the group of milestones in the escrow"},"approver":{"type":"string","description":"Address of the entity requiring the service"}},"required":["contractId","milestoneIndex","approver"]}}}}
```

*`approve-milestones` accepts an array of milestone indexes, allowing a single transaction to approve multiple milestones at once. The approver must be one of the addresses listed in roles.approvers.*

<figure><img src="/files/i7oyaO0K6fk04SOeQwgH" alt=""><figcaption></figcaption></figure>

### **What this Endpoint returns?**

This endpoint returns the transaction unsigned so that the transaction can be signed by means of a customer wallet.

### Use Example:

```typescript
import axios from "axios";

const http = axios.create({
  baseURL: "https://dev.api.trustlesswork.com",
  timeout: 10000,
  headers: {
    "Content-Type": "application/json",
    "x-api-key": your_api_key,
  },
});

export const useExample = async () => {
    // Get the signer address
    const { address } = await kit.getAddress();

    const response = await http.post(
      "/escrow/single-release/v2/approve-milestones",
      {
        // body requested for the endpoint
      },
    ); 
    
    // Get the unsigned transaction hash
    const { unsignedTransaction } = response.data;

    // Sign the transaction by wallet
    const { signedTxXdr } = await signTransaction(unsignedTransaction, {
      address,
      networkPassphrase: WalletNetwork.TESTNET,
    });

    // Send the transaction to Stellar Network
    const tx = await http.post("/stellar/submit-transaction", {
      signedXdr: signedTxXdr,
    });

    const { data } = tx;

    return data;
}
```


---

# 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.trustlesswork.com/trustless-work/v2-en/api-rest/deploy/change-milestone-flag.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.