update_min_contribution
Call v273 → current #6Updates the minimum contribution amount.
View calls on chainCall Workflow
This diagram shows the call execution flow: starting with update_min_contribution, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks, followed by dispatch which emits events: MinContributionUpdated 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
Creators can adjust minimum while active.
Use Cases
- Adjust campaign parameters
From Chain Metadata
Update the minimum contribution 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 minimum contribution of. `new_min_contribution`: The new minimum contribution.
Input Parameters
| # | Name | Type | Description |
|---|---|---|---|
| 0 | crowdloan_id | Compact<u32> Cpt CrowdloanId | crowdloan_id: Crowdloan identifier (SCALE compact -> integer) |
| 1 | new_min_contribution | Compact<u64> Cpt BalanceOf<T> | new_min_contribution: 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
Effects
Events Emitted
Storage Modified
Postconditions
- Minimum updated
- MinContributionUpdated event emitted
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_min_contribution call (typed, named args)
const crowdloan_id = 0;
const new_min_contribution = 0n;
const tx = api.tx.Crowdloan.update_min_contribution({
crowdloan_id,
new_min_contribution,
});Runtime Info
- Pallet Index
- 27
- Call Index
- 6
- First Version
- v273
- Current Version
- v411