ramda#isEmpty JavaScript Examples

getUnclaimedStashesEras = curry((api, { eras }, stashIds$) =>
  // Concurrently get unclaimed eras for each of stashes
  stashIds$.pipe(
    mergeMap(
      (stashId) =>
        from(getUnclaimedStashEras(api, eras, stashId)).pipe(
          // Filter out stashes with no unclaimed eras
          filterRx(complement(isEmpty)),
          mapRx(assoc("eras", __, { stashId }))
        ),
      ConcurrentRequestsLimit
    )
  )
)

buildValidatorRewards = curry(
  ({ pointsByEra, rewardsByEra, prefsByEra }, validatorEras) => {
    const stashErasReducer = (acc, { eras, stashId }) => {
      const eraReducer = (acc, era) => {
        const eraKey = era.toString();
        const eraPoints = pointsByEra[eraKey];
        const eraRewards = rewardsByEra[eraKey];
        const eraPrefs = prefsByEra[eraKey];

        if (
          // Points must be greater than 0
          eraPoints?.eraPoints.gt(new BN(0)) &&
          // We must have a stash as a validator in the given era
          eraPoints?.validators[stashId] &&
          // Era rewards should be defined
          eraRewards &&
          // Validator commission in the given era should be acceptable
          eraPrefs.validators[stashId]?.commission?.toBn().lte(MaxCommission)
        ) {
          const reward = eraPoints.validators[stashId]
            .mul(eraRewards.eraReward)
            .div(eraPoints.eraPoints);

          if (!reward.isZero())
            return acc.concat({
              era,
              reward,
            });
        }

        return acc;
      };

      return eras.reduce(eraReducer, acc);
    };

    return o(
      // Filter out stashes with no rewards
      reject(isEmpty),
      // Reduce given stash eras by the stash id
      reduceBy(stashErasReducer, [], prop("stashId"))
    )(validatorEras);
  }
)

isNotFilled = anyPass([
	either(isNil, equalsEmptyString),
	both(isArray, isEmpty),
])

intersect = (needed = [], received = []) => intersection(needed, received) |> isEmpty |> not

/**
 * Sends staking payouts for recent eras using the given sender account.
 *
 * @param {DockAPI} dock
 * @param {ErasInfo} erasInfo
 * @param {*} initiator - account to send tx from
 * @param {number} batchSize
 * @returns {Promise<boolean>} - `true` if some unpaid eras were found, `false` otherwise
 */
async function sendStakingPayouts(dock, erasInfo, initiator, batchSize) {
  const validators = pipe(
    values,
    pluck("validators"),
    chain(keys),
    (values) => new Set(values)
  )(erasInfo.pointsByEra);

  if (!validators.size) {
    console.log("- Validator set is empty.");
    return false;
  }

  console.log("- Retrieving validator eras...");
  const erasToBePaid = await lastValueFrom(
    from(validators).pipe(
      getUnclaimedStashesEras(dock.api, erasInfo),
      toArray()
    )
  );

  const rewards = pipe(buildValidatorRewards, toPairs)(erasInfo, erasToBePaid);

  if (isEmpty(rewards)) {
    console.log("- No unpaid validator rewards found for recent eras.");
    return false;
  }

  console.log("- Payouts need to be made:");

  for (const [stashId, eras] of rewards) {
    const total = eras.reduce(
      (total, { reward }) => (total != null ? total.add(reward) : reward),
      null
    );

    console.log(` * To \`${stashId}\`: ${formatDock(total)}`);
  }

  const logResult = ({ result, tx }) => {
    // Ther's a much better way to check this...
    const isBatch = tx.method.args?.[0]?.[0] instanceof Map;

    let msg = " * ";
    if (isBatch) msg += `Batch transaction`;
    else msg += `Transaction`;

    if (FinalizeTx) {
      msg += ` finalized at block \`${result.status.asFinalized}\`: `;
    } else {
      msg += ` included at block \`${result.status.asInBlock}\`: `;
    }

    const payoutsSummary = (isBatch ? tx.method.args[0] : [tx.method])
      .map((payout) => payout.get("args"))
      .map(
        ({ validator_stash, era }) =>
          `\`${validator_stash}\` rewarded for era ${era}`
      )
      .join(isBatch ? ",\n    " : ",");

    msg += isBatch ? `[\n    ${payoutsSummary}\n ]` : payoutsSummary;

    console.log(msg);
  };

  const payoutTxs$ = from(rewards).pipe(
    concatMap(([stashId, eras]) => from(eras.map(assoc("stashId", stashId)))),
    mapRx(({ stashId, era }) =>
      dock.api.tx.staking.payoutStakers(stashId, era)
    ),
    batchExtrinsics(dock.api, batchSize),
    signAndSendExtrinsics(dock, initiator),
    tap(logResult)
  );

  await new Promise((resolve, reject) =>
    payoutTxs$.subscribe({
      error: reject,
      complete: resolve,
    })
  );

  return true;
}

/**
 *
 * @param {function(String)} userCallback
 * @return {function(): void}
 */
// initWithCallback :: (String -> *) -> (... -> undefined)
function initWithCallback(userCallback) {
	if(isIOS) {
		return subscribeOnIOS(userCallback);
	}
	
	const
		INPUT_ELEMENT_FOCUS_JUMP_DELAY = 700,
		SCREEN_ORIENTATION_TO_WINDOW_RESIZE_DELAY = 700,
		RESIZE_QUIET_PERIOD = 500,
		LAYOUT_RESIZE_TO_LAYOUT_HEIGHT_FIX_DELAY =
			Math.max(INPUT_ELEMENT_FOCUS_JUMP_DELAY, SCREEN_ORIENTATION_TO_WINDOW_RESIZE_DELAY) - RESIZE_QUIET_PERIOD + 200,
		
		[ induceUnsubscribe, userUnsubscription ] = createAdapter(),
		scheduler = newDefaultScheduler(),
		
		// assumes initially hidden OSK
		initialLayoutHeight = window.innerHeight,
		// assumes initially hidden OSK
		approximateBrowserToolbarHeight = screen.availHeight - window.innerHeight,
		// Implementation note:
		// On Chrome window.outerHeight changes together with window.innerHeight
		// They seem to be always equal to each other.
		
		focus =
			merge(focusin(document.documentElement), focusout(document.documentElement)),
		
		documentVisibility =
			applyTo(domEvent('visibilitychange', document))(pipe(
				map(() => document.visibilityState),
				startWith(document.visibilityState)
			)),
		
		isUnfocused =
			applyTo(focus)(pipe(
				map(evt =>
					evt.type === 'focusin' ? now(false) : at(INPUT_ELEMENT_FOCUS_JUMP_DELAY, true)
				),
				switchLatest,
				startWith(!isAnyElementActive()),
				skipRepeats,
				multicast
			)),
		
		layoutHeightOnOSKFreeOrientationChange =
			applyTo(change(screen.orientation))(pipe(
				// The 'change' event hits very early BEFORE window.innerHeight is updated (e.g. on "resize")
				snapshot(
					unfocused => unfocused || (window.innerHeight === initialLayoutHeight),
					isUnfocused
				),
				debounce(SCREEN_ORIENTATION_TO_WINDOW_RESIZE_DELAY),
				map(isOSKFree => ({
					screenOrientation: getScreenOrientationType(),
					height: isOSKFree ? window.innerHeight : screen.availHeight - approximateBrowserToolbarHeight
				}))
			)),
		
		layoutHeightOnUnfocus =
			applyTo(isUnfocused)(pipe(
				filter(identical(true)),
				map(() => ({screenOrientation: getScreenOrientationType(), height: window.innerHeight}))
			)),
		
		// Difficulties: The exact layout height in the perpendicular orientation is only to determine on orientation change,
		// Orientation change can happen:
		// - entirely unfocused,
		// - focused but w/o OSK, or
		// - with OSK.
		// Thus on arriving in the new orientation, until complete unfocus, it is uncertain what the current window.innerHeight value means
		
		// Solution?: Assume initially hidden OSK (even if any input has the "autofocus" attribute),
		// and initialize other dimension with screen.availWidth
		// so there can always be made a decision on the keyboard.
		layoutHeights =
			// Ignores source streams while documentVisibility is 'hidden'
			// sadly visibilitychange comes 1 sec after focusout!
			applyTo(mergeArray([layoutHeightOnUnfocus, layoutHeightOnOSKFreeOrientationChange]))(pipe(
				delay(1000),
				rejectCapture(map(equals("hidden"), documentVisibility)),
				scan(
					(accHeights, {screenOrientation, height}) =>
						assoc(screenOrientation, height, accHeights),
					{
						[getScreenOrientationType()]: window.innerHeight
					}
				),
				skipAfter(compose(isEmpty, difference(['portrait', 'landscape']), keys))
			)),
		
		layoutHeightOnVerticalResize =
			applyTo(resize(window))(pipe(
				debounce(RESIZE_QUIET_PERIOD),
				map(evt => ({ width: evt.target.innerWidth, height: evt.target.innerHeight})),
				scan(
					(prev, size) =>
						({
							...size,
							isJustHeightResize: prev.width === size.width,
							dH: size.height - prev.height
						}),
					{
						width: window.innerWidth,
						height: window.innerHeight,
						isJustHeightResize: false,
						dH: 0
					}
				),
				filter(propEq('isJustHeightResize', true))
			)),
		
		osk =
			applyTo(layoutHeightOnVerticalResize)(pipe(
				delay(LAYOUT_RESIZE_TO_LAYOUT_HEIGHT_FIX_DELAY),
				snapshot(
					(layoutHeightByOrientation, {height, dH}) => {
						const
							nonOSKLayoutHeight = layoutHeightByOrientation[getScreenOrientationType()];
						
						if (!nonOSKLayoutHeight) {
							return (dH > 0.1 * screen.availHeight) ? now("hidden")
								: (dH < -0.1 * screen.availHeight) ? now("visible")
									: empty();
						}
						
						return (height < 0.9 * nonOSKLayoutHeight) && (dH < 0) ? now("visible")
							: (height === nonOSKLayoutHeight) && (dH > 0) ? now("hidden")
							: empty();
					},
					layoutHeights
				),
				join,
				merge(applyTo(isUnfocused)(pipe(
					filter(identical(true)),
					map(always("hidden"))
				))),
				until(userUnsubscription),
				skipRepeats
			));
	
	runEffects(tap(userCallback, osk), scheduler);
	
	return induceUnsubscribe;
}