Fund Treasury

Funding the treasury allows any user to deposit ADA or native assets into a project's on-chain treasury. The treasury holds funds used to pay task rewards when contributors complete work. Any user can fund a treasury — no specific role is required beyond having a wallet.

Summary

Property	Value
System	Project
Role	User (any)
Type Key	`treasury_fund`
Build Endpoint	`POST /api/v2/tx/project/user/treasury/add-funds`
DB Sync	No
Service Fee	0 ADA
Est. Wallet Cost	tx fee + deposit amount

The wallet cost is the transaction fee (typically under 0.5 ADA) plus the full deposit amount. The treasury balance is tracked entirely on-chain with no database sync.

Build Transaction

Endpoint

POST /api/v2/tx/project/user/treasury/add-funds

Request Body

{
  "project_id": "a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4",
  "deposit_value": [["lovelace", 500000000]],
  "alias": "funder1",
  "initiator_data": {
    "usedAddresses": ["addr1qx2fxv2umyhttkxyxp8x0dlpdt3k6cwng5pxj3jhsydzer3n0d3vllmyqwsx5wktcd8cc3sq835lu7drv2xwl2wywfgse35a3x"],
    "changeAddress": "addr1qx2fxv2umyhttkxyxp8x0dlpdt3k6cwng5pxj3jhsydzer3n0d3vllmyqwsx5wktcd8cc3sq835lu7drv2xwl2wywfgse35a3x"
  }
}

Field	Type	Required	Description
`project_id`	`string` (GYMintingPolicyId)	Yes	56-character hex policy ID returned from project creation.
`deposit_value`	`array`	Yes	Asset class/quantity pairs as `[[unit, amount]]`. For ADA, use `["lovelace", amount]` where amount is in lovelace (1 ADA = 1,000,000 lovelace).
`alias`	`string` (Alias)	No	The funder's access token alias, if they have one.
`initiator_data`	`WalletData`	No	Object containing `usedAddresses` (string[]) and `changeAddress` (string). If omitted, the Gateway resolves wallet data from the authenticated session.

Response

{
  "unsigned_tx": "84a800..."
}

The response contains the unsigned transaction CBOR, ready for the user's wallet to sign.

Register Transaction

After the user signs and submits the transaction, register it with the state machine:

POST /api/v2/tx/register

{
  "tx_hash": "64-char hex hash from wallet.submitTx()",
  "tx_type": "treasury_fund"
}

No metadata is required. Since the treasury balance is tracked on-chain only, the state machine confirms the transaction but does not update the database with balance information.

Endpoint	Description
`GET /api/v2/projects/{project_id}/treasury`	Fetch the current treasury balance and funding history

Example: Full Lifecycle

const API_URL = "https://api.andamio.io";

// 1. Build
const buildRes = await fetch(`${API_URL}/api/v2/tx/project/user/treasury/add-funds`, {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-API-Key": API_KEY,
    "Authorization": `Bearer ${userJwt}`,
  },
  body: JSON.stringify({
    project_id: projectId,
    deposit_value: [["lovelace", 500000000]],
    alias: "funder1",
    initiator_data: {
      usedAddresses: [walletAddress],
      changeAddress: walletAddress,
    },
  }),
});
const { unsigned_tx } = await buildRes.json();

// 2. Sign
const signedTx = await wallet.signTx(unsigned_tx);

// 3. Submit
const txHash = await wallet.submitTx(signedTx);

// 4. Register
await fetch(`${API_URL}/api/v2/tx/register`, {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-API-Key": API_KEY,
    "Authorization": `Bearer ${userJwt}`,
  },
  body: JSON.stringify({
    tx_hash: txHash,
    tx_type: "treasury_fund",
  }),
});

// 5. Monitor (SSE)
const events = new EventSource(
  `${API_URL}/api/v2/tx/stream/${txHash}`
);
events.addEventListener("state_change", (e) => {
  const data = JSON.parse(e.data);
  console.log(`State: ${data.old_state} → ${data.new_state}`);
});
events.addEventListener("complete", (e) => {
  const data = JSON.parse(e.data);
  console.log(`Final: ${data.final_state}`);
  events.close();
});