order sanity checks

src/components/chart/ChartOrder.vue

@@ -70,7 +70,7 @@ import BuilderFactory from "@/components/chart/BuilderFactory.vue";
 import {builderFuncs, newBuilder, orderFuncs, useChartOrderStore} from "@/orderbuild.js";
 import {useOrderStore, useStore} from "@/store/store.js";
 import {computed, onUnmounted, onUpdated, ref, watchEffect} from "vue";
-import {lightenColor, lightenColor2} from "@/misc.js";
+import {lightenColor, lightenColor2, toPrecision} from "@/misc.js";
 import {useTheme} from "vuetify";
 import RowBar from "@/components/chart/RowBar.vue";
 import ColorBand from "@/components/chart/ColorBand.vue";
@@ -114,7 +114,38 @@ function buildOrder() {
   const order = props.order
   console.log('buildOrder', order)
 
-  if (!order.amount) return null
+  if (!order.amount)
+    return {order: null, warnings: ['Amount must be greater than 0']}
+
+  const symbol = co.selectedSymbol
+  const amountDec = order.amountIsTokenA ? symbol.base.d : symbol.quote.d
+  const amount = BigInt(Math.trunc(order.amount * 10 ** amountDec))
+
+  let warnings = []
+  const inAddr = order.buy ? symbol.quote.a : symbol.base.a
+  const inDec = order.buy ? symbol.quote.d : symbol.base.d
+  const available = s.getBalance(inAddr) / 10 ** inDec
+
+  let needed
+  if (order.amountIsTokenA && order.buy)
+    // need quote currency to buy an amount of base
+    needed = order.amount * co.price
+  else if (order.amountIsTokenA && !order.buy)
+    // sell an exact amount of base
+    needed = order.amount
+  else if (!order.amountIsTokenA && order.buy)
+    // need an exact amount of quote
+    needed = order.amount
+  else if (!order.amountIsTokenA && !order.buy)
+    // sell a quote amount worth of base
+    needed = order.amount / co.price
+  else
+    throw new Error('Invalid order')
+  const deficit = needed - available
+  if (deficit > 0) {
+    const inSymbol = order.buy ? symbol.quote.s : symbol.base.s
+    warnings.push(`Insufficient funds. Add ${toPrecision(deficit, 5)} ${inSymbol} to your vault to complete this order.`)
+  }
 
   // struct SwapOrder {
   //     address tokenIn;
@@ -127,20 +158,24 @@ function buildOrder() {
   //     uint64 conditionalOrder; // use NO_CONDITIONAL_ORDER for no chaining. conditionalOrder index must be < than this order's index for safety (written first) and conditionalOrder state must be Template
   //     Tranche[] tranches;
   // }
-  const symbol = co.selectedSymbol
-  const amountDec = order.amountIsTokenA ? symbol.base.d : symbol.quote.d
-  const amount = BigInt(Math.trunc(order.amount * 10 ** amountDec))
   const amountIsInput = !!(order.amountIsTokenA ^ order.buy)
 
   let tranches = []
   for (const builder of builders.value) {
     console.log('builder', builder)
-    const ts = builderFuncs[builder.id]()
+    const built = builderFuncs[builder.id]()
+    const ts = built.tranches
+    const ws = built.warnings
     console.log('tranches', ts)
     tranches = [...tranches, ...ts]
+    warnings = [...warnings, ...ws]
   }
 
-  return newOrder(tokenIn.value.a, tokenOut.value.a, symbol.exchangeId, symbol.fee, amount, amountIsInput, symbol.inverted, tranches)
+  return {
+    warnings,
+    order: newOrder(tokenIn.value.a, tokenOut.value.a, symbol.exchangeId, symbol.fee,
+                    amount, amountIsInput, symbol.inverted, tranches),
+  }
 }