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Adjust available calc (only vested, when free - reserved > vested) (#1588)

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Jaco Greeff
2019-11-19 16:35:28 +01:00
committed by GitHub
parent 87aab2eca5
commit 6b74ea39c2
1 changed files with 9 additions and 3 deletions
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packages/api-derive/src/balances/all.ts
+9 -3
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@@ -38,9 +38,15 @@ function calcBalances ([accountId, bestNumber, [freeBalance, reservedBalance, lo
const vestedBalance = createType('Balance', perBlock.mul(bestNumber));
const isVesting = vestedBalance.lt(vestingTotal);
// see what is availble with the current vested amount taken into account
const freeWithVesting = freeBalance.sub(vestingTotal).add(vestedBalance);
const availableBalance = createType('Balance', bnMax(new BN(0), (isVesting ? freeWithVesting : freeBalance).sub(lockedBalance)));
// The available balance & vested has an interplay here
// "
// vesting is a guarantee that the account's balance will never go below a certain amount. so it functions in the opposite way, a bit like a lock that is monotonically decreasing rather than a liquid amount that is monotonically increasing.
// locks function as the same guarantee - that a balance will not be lower than a particular amount.
// because of this you can see that if there is a "vesting lock" that guarantees the balance cannot go below 200, and a "staking lock" that guarantees the balance cannot drop below 300, then we just have two guarantees of which the first is irrelevant.
// i.e. (balance >= 200 && balance >= 300) == (balance >= 300)
// ""
const floating = freeBalance.sub(lockedBalance);
const availableBalance = createType('Balance', bnMax(new BN(0), isVesting && floating.gt(vestedBalance) ? vestedBalance : floating));
return {
accountId,