How to use the @polkadot/api/rx/Api function in @polkadot/api
To help you get started, we’ve selected a few @polkadot/api examples, based on popular ways it is used in public projects.
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polkadot-js / api / packages / api-derive / src / index.spec.ts View on Github 
describe('custom', (): void => {
const api = new ApiRx({
derives: {
balances: {
fees: (): any => (): Observable => from(['a', 'b'])
},
custom: {
test: (): any => (): Observable => from([1, 2, 3])
}
},
provider: new MockProvider(registry),
registry
});
beforeAll((done): void => {
api.isReady.subscribe((): void => done());
});@polkadot/api
Promise and RxJS wrappers around the Polkadot JS RPC
