withdraw
Call v273 → current #2Withdraws your contribution from an active crowdloan.
View calls on chainCall Workflow
This diagram shows the call execution flow: starting with withdraw, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks, followed by dispatch which emits events: Withdrew and modifies storage: Crowdloans, Contributions, and finally post-dispatch where ExtrinsicSuccess is emitted and fees are settled.
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Used by: stakersdevelopers
The Big Picture
Contributors can withdraw at any time before finalization.
Use Cases
- Exit campaign before finalization
From Chain Metadata
Withdraw a contribution from an active (not yet finalized or dissolved) crowdloan. Only contributions over the deposit can be withdrawn by the creator. The dispatch origin for this call must be _Signed_. Parameters: `crowdloan_id`: The id of the crowdloan to withdraw from.
Input Parameters
| # | Name | Type | Description |
|---|---|---|---|
| 0 | crowdloan_id | Compact<u32> Cpt CrowdloanId | crowdloan_id: Crowdloan identifier (SCALE compact -> integer) |
Permissions
Origin
Signed
Required Role
Permission data inferred from metadata. May be incomplete.
Requirements
- Crowdloan not finalized
- Signer has contribution
Effects
Events Emitted
Storage Modified
Postconditions
- Contribution returned
- Withdrew event emitted
Side Effects
- Decreases total raised
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 withdraw call (typed, named args)
const crowdloan_id = 0;
const tx = api.tx.Crowdloan.withdraw({
crowdloan_id,
});Runtime Info
- Pallet Index
- 27
- Call Index
- 2
- First Version
- v273
- Current Version
- v411