feat: Add pallet methods `crowdloan.{contribute, withdraw}`

paritytech / txwrapper

Helper funtions for offline transaction generation.

Apache License 2.0

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Closed emostov closed 3 years ago

emostov commented 3 years ago

Closes #407.

feature: Adds crowdloan.contribute & crowdloan.withdraw, which will enable users to participate in crowdloans.

testing: Adds metadata from westend spec version 50, which has the components for PLO process. This metadata is used in the new unit tests.

Bumps polkadot-js/api to 4.1.1.