LIVE-1292 Cover Polkadot existential deposit edge case

src/families/polkadot/js-getTransactionStatus.ts

@@ -77,7 +77,9 @@ const getSendTransactionStatus = async (
   const minimumBalanceExistential = getMinimumBalance(a);
   const leftover = a.spendableBalance.minus(totalSpent);
 
-  if (
+  if (a.spendableBalance.lte(EXISTENTIAL_DEPOSIT)) {
+    errors.amount = new NotEnoughBalance();
+  } else if (
     minimumBalanceExistential.gt(0) &&
     leftover.lt(minimumBalanceExistential) &&
     leftover.gt(0)

src/families/polkadot/js-signOperation.ts

@@ -29,6 +29,7 @@ const MODE_TO_TYPE = {
 };
 const MODE_TO_PALLET_METHOD = {
   send: "balances.transferKeepAlive",
+  sendMax: "balances.transfer",
   bond: "staking.bond",
   bondExtra: "staking.bondExtra",
   unbond: "staking.unbond",
@@ -52,6 +53,10 @@ const getExtra = (type: string, account: Account, transaction: Transaction) => {
       }
     : {};
 
+  if (transaction.mode == "send" && transaction.useAllAmount) {
+    extra.palletMethod = MODE_TO_PALLET_METHOD["sendMax"];
+  }
+
   switch (type) {
     case "OUT":
       return { ...extra, transferAmount: new BigNumber(transaction.amount) };

src/families/polkadot/logic.ts

@@ -3,7 +3,7 @@ import type { Account, OperationType } from "../../types";
 import type { Transaction } from "./types";
 import { getCurrentPolkadotPreloadData } from "./preload";
 
-export const EXISTENTIAL_DEPOSIT = new BigNumber(10000000000);
+export const EXISTENTIAL_DEPOSIT = new BigNumber(11000000000);
 export const MAX_NOMINATIONS = 16;
 export const MAX_UNLOCKINGS = 32;
 export const PRELOAD_MAX_AGE = 60 * 1000;