Call Workflow
This diagram shows the call execution flow: starting with update_cap, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks, followed by dispatch which emits events: CapUpdated and modifies storage: Crowdloans, and finally post-dispatch where ExtrinsicSuccess is emitted and fees are settled.
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Used by: developerssubnet owners
The Big Picture
Adjust target - lowering below raised enables finalization.
Use Cases
- Adjust funding goal
From Chain Metadata
Update the cap of a non-finalized crowdloan. The dispatch origin for this call must be _Signed_ and must be the creator of the crowdloan. Parameters: `crowdloan_id`: The id of the crowdloan to update the cap of. `new_cap`: The new cap.
Input Parameters
| # | Name | Type | Description |
|---|---|---|---|
| 0 | crowdloan_id | Compact<u32> Cpt CrowdloanId | crowdloan_id: Crowdloan identifier (SCALE compact -> integer) |
| 1 | new_cap | Compact<u64> Cpt BalanceOf<T> | new_cap: Balance in chain native currency (RAO for TAO; ÷10⁹) (SCALE compact -> integer) |
Permissions
Origin
Signed
Required Role
Permission data inferred from metadata. May be incomplete.
Requirements
- Crowdloan not finalized
- Signer is creator
- Cap exceeds deposit
Effects
Events Emitted
Storage Modified
Postconditions
- Cap updated
- CapUpdated event emitted
Side Effects
- If lowered below raised, may become finalizable
Code Examples
import { createClient, Binary } from "polkadot-api";
import { getWsProvider } from "polkadot-api/ws";
import { sub } from "@polkadot-api/descriptors"; // generated by: npx papi add sub -w wss://entrypoint-finney.opentensor.ai:443
const client = createClient(getWsProvider("wss://entrypoint-finney.opentensor.ai:443"));
const api = client.getTypedApi(sub);
// Build update_cap call (typed, named args)
const crowdloan_id = 0;
const new_cap = 0n;
const tx = api.tx.Crowdloan.update_cap({
crowdloan_id,
new_cap,
});Runtime Info
- Pallet Index
- 27
- Call Index
- 8
- First Version
- v273
- Current Version
- v411