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Polkadot-JS Guides about the Treasury

Polkadot-JS is for developers and power users only. If you need help using the Polkadot-JS UI, you can contact the Polkadot Support Team. For more user-friendly tools see the wallets, apps and dashboard pages.

See this page to learn about the Polkadot Treasury.

Creating a Treasury Proposal​

Your proposal should address a problem, outline a goal, give a detailed account of how you will reach that goal, and include any ongoing maintenance needs. As much as possible, you should itemize the tasks to be completed so fees can be evaluated and milestones can be followed. You can check the guidelines below:

Announcing the Proposal​

To minimize storage on-chain, proposals don't contain contextual information. When a user submits a proposal, they will need to find an off-chain way to explain the proposal via community channels.

Spreading the word about the proposal's explanation to the community is ultimately up to the proposer.

Use Accounts with Verified On-Chain Identity for Treasury Proposals

To ensure legitimacy, it is required that the account linked to the Treasury proposal has an identity set and is verified by an on-chain registrar.

Creating a Treasury Proposal - Spend Local​

"Spend" vs. "Spend Local"

You may notice that the Treasury pallet contains two extrinsics - treasury.spend and treasury.spendLocal. treasury.spendLocal (formally called treasury.spend) refers to a spend of DOT that is locally available, i.e., DOT from the relay chain's treasury account. spend actually allows the caller to specify an asset other than DOT, or even assets in other locations, e.g. Asset Hub.

Unlike treasury.spendLocal, treasury.spend is not bound by a spend period, and must be claimed manually via the treasury.payout extrinsic. treasuy.spendLocal behavior remains unchanged.

Submit Treasury Proposal Preimage​

The example below shows how to create a preimage for a transaction that requests 100 DOT from Treasury.

  • Navigate to Polkadot-JS UI > Governance > Preimages and then click on Add Preimage.
  • Select the account which will be used to submit the preimage.
  • Choose treasury pallet in the "propose" dropdown and the spendLocal(amount, beneficiary)call
  • Enter the DOT amount.
  • Enter the AccountID of the beneficiary (which has a verified on-chain identity).
  • Submit preimage
  • Sign and submit the transaction by paying the specified transaction fees.
Preimage Submission Deposit

A deposit is required for the preimage to be stored on chain. The preimage deposit is proportional to the amount of information stored within the preimage. The deposit amount required for a preimage with a treasury spend transaction is around 41 DOT (1.4 KSM on Kusama). Ensure you have enough account balance to pay for the submission deposit and the transaction fees.

Here is the preimage requesting for 100 DOT.

Treasury Preimage

Balance entered is in Plancks

Polkadot JS UI is for developers and the UI takes input of the balance in plancks. DOT has 10 decimals, which is 10000000000 plancks per DOT.

After successful submission of the preimage, it is displayed on Polkadot-JS UI > Governance > Preimages page. Every preimage is associated with a unique preimage hash (highlighted in a box in the image below). Take a note of this preimage hash, which is required to submit a referendum.

Treasury Preimage Hash

Submit a Treasury Track Referendum​

The example below shows how to submit a Treasury track referendum.

  • Navigate to Polkadot-JS UI > Governance > Referenda and then click on Submit proposal.
  • Select the account which will be used to submit the proposal.
  • Choose the appropriate submission track (The example below selected Small Spender track).
  • Enter the preimage hash of the treasury spend transaction.(If the preimage exists on-chain, the preimage length box is automatically populated)
  • Click on Submit proposal.
  • Sign and submit the transaction.

Submit Treasury Proposal

Once your submission is executed, your referendum will appear under your chosen track on the Polkadot-JS UI referenda page.

Place a Decision Deposit for the Treasury Track Referendum​

For the referendum to move from preparing phase to the deciding phase, a decision deposit needs to be placed. The decision deposit values for each individual Treasury Tracks are listed in a section above in this document.

Submit Treasury Proposal Decision Deposit

The preimage and decision deposits can be claimed once the referendum ends.

Creating a Multistage Payout Proposal with validFrom​

Staged proposals are similar to a tranche or milestone-based funding model; instead of all spends being paid simultaneously, each portion is redeemable at a certain block height. This is done by specifying each milestone, set at its respective amount and block height at which it becomes redeemable.

For example, take the following "staged" proposal, which has three milestones, each at 100 DOT, and is redeemable at the following block heights. Usually, block heights correspond to a date in the future:

  • 100 DOT paid out at block height 1000
  • 200 DOT paid out at block height 2000
  • 500 DOT paid out at block height 4000

Governance can also propose to void a staged proposal before it has completed all of its payouts.

Calculating dates from block heights

Although not the most accurate form of measurement, block heights can be used to correspond to certain dates in the future.

Using batch for Multi-Spend Proposals​

Using the Utility pallet, one can batch multiple treasury.spend calls together. Each of these calls can have its own validFrom block height, which allows for scenarios such as the above to be possible.

Multistage payout proposal example

For reference on how to create a multistage payout proposal, please check Referendum 382 on Kusama.

Using validFrom for a Milestone-Based Proposal​

Once each spend is defined within the batched call, the validFrom field can be utilized to specify the "date", or block height, at which each spend will be executed.

Treasury Spends have to be claimed manually. Spends can expire!

Keep in mind that once the validFrom block height has been reached, you will have to claim the spend within 30 days. Check the claiming process for treasury spends here

Creating a USDT Treasury Proposal - Spend (with AssetHub)​

The following tutorial mostly goes over how to utilize the spend extrinsic, which, unlike spendLocal, is able to specify assets besides the native asset in other locations, such as Asset Hub.

Creating a Preimage​

The example below shows how to create a preimage for a transaction that requests 100 USDT from AssetHub.

  • Navigate to Polkadot-JS UI > Governance > Referenda and then click on Add Preimage.
  • Select the account to submit the preimage.
  • Choose the treasury pallet in the "propose" dropdown and the spend(assetKind, amount, beneficiary, validFrom) call.

Now, let's go through each field one-by-one and fill them in accordingly:

Specifying Asset Kind​

assetKind refers to the asset to be used, specified via XCM. In short, we need to be able to find:

  • The relative location of the asset, and
  • How it is identified within this location.

For this example, we are using USDT, which from the perspective of the relay chain would be:

Parachain 1000 (AssetHub) > AssetId (Concrete) > PalletInstance 50 > General Index 1984

First, we specify the location - in this case, Asset Hub (parachain 1,000). PalletInstance 50 refers to the Assets pallet instance on Asset Hub. The general index is 1984, which is the ID of USDT in this instance of the Assets pallet.

Bug on Polkadot-JS UI

As the Polkadot-JS UI is interpreting the general index in DOT, it multiplies the entered values with 10000000000 (As DOT token has 10 decimals) and places it in the u128 argument. As we would like to have 1984 as the input argument, we can offset this UI induced error by entering 0.0000001984.

The issue on Polkadot-JS repo can be tracked here.

Here is how the final assetKind field should look:

Asset Kind

Specifying the Amount​

The amount should be simply the amount of USDT, where each 1 USDT is 1000000. Because we are asking for 100 USDT, we put 100000000 as the input for the amount.

Bug on Polkadot-JS UI

As the Polkadot-JS UI is interpreting the asset balance in DOT, it multiplies the entered values with 10000000000 (As DOT token has 10 decimals) and places it in the u128 argument. As we would like to have 100000000 as the input argument, we can offset this UI induced error by entering 0.01 for this particular example where we like to input 100 USDT.

The issue on Polkadot-JS repo can be tracked here.

Asset Value, Beneficiary and ValidFrom

Specifying the Beneficiary​

The beneficiary account will be one on Asset Hub. For this reason, the XCM junction must be specified as follows, with one junction (X1) and the beneficiary account (AccountId32), which is an account address on the chain.

Specifying validFrom (optional)​

The validFrom field is optional, and refers to the block height of the relay chain upon which the payout can be issued. If the validFrom parameter is not set, the spend can be paid out immediately after approval. For more information on this field, refer to the guide below.

The final call should look like the following, where we:

  • Specify our asset as USDT on Asset Hub.
  • Specify the amount of USDT (100).
  • Specify the beneficiary address.
  • If applicable, use the validFrom field to specify a block number upon which the payout becomes valid.

The next steps are to:

  • Copy the preimage (and its length)
  • Sign and submit the preimage

Once this is finished, one may submit a proposal as stated above. Keep in mind one will also need to provide the decision deposit as well.

Manually Claiming Payouts​

In order to claim the spend, you must manually call the treasury.payout extrinsic via a Signed origin. The spendID for the pending payout can be queried on-chain through Polkadot-JS UI > Developer > Chain State > Storage > treasury > spends and unselect the include option and then click on the plus button to the right.

payout

From the list of spends, find the spendID of your respetive payout and issue the payout extrinsic.

payout example

To claim the first payout of Referendum 382 on Kusama, this payout extrinsic was issued. After issuing the payout extrinsic, the status of the payout changes from pending to Attempted with a reference to a payment ID. If the payout is successful, the balance on Asset Hub should be updated. Here is the transfer extrinsic on Asset Hub for the first payout of Referendum 382.

To clear the on-chain storage of a successful or expired spend, Treasury pallet's checkStatus extrinsic can be used. The transaction fees paid for issuing this extrinsic will be refunded.

Proposing a "Void" for a Staged Proposal​

If a proposal that hasn't completed all of its spends needs to be voided, the treasury.voidSpend extrinsic can be utilized via a governance proposal.

Example proposal - Voiding a Treasury Spend

For reference, check the referenda on Kusama that tests VoidSpend functionality for Treasury Payouts. Through this referenda, a treasury spend was successfully voided.

Submit Treasury Proposal via Polkassembly​

To submit a treasury track referendum via Polkassembly click on the FAB button in the bottom right corner. Then,

  • Click on "Create Treasury Proposal" and choose an address for the proposer.

  • After choosing an address, you will enter a three-stage guideline:

    • Write a proposal: you can add a detailed description for the proposal, which will be stored on Polkassembly. Alternatively, you can link an existing discussion post.

    polkassembly-write-proposal

    • Create a preimage: an existing preimage can be linked, or a new one can be created. To create a preimage, add the beneficiary address and the token amount. The track will be auto-selected and the user can proceed with the creation of a preimage.

    polkassembly-create-preimage

    • Create a proposal: final confirmation about the proposal creation. The description of the proposal and the preimage are automatically linked to the proposal.

Requesting Tips from the Treasury​

To request a tip funded by the treasury, you can follow the above steps for creating a treasury proposal but instead of submitting the proposal to the 32 / Small Spender track, you will need to submit it to the 30 / Small Tipper or 31 / Big Tipper tracks depending on the number of tokens to be requested.

Briefly, you will need to:

Last updated on by Filippo