Don't continue to step 4 if min cap is not valid

src/components/stepThree/index.js

@@ -139,15 +139,24 @@ export class stepThree extends React.Component {
 
     const { tierStore, gasPriceStore } = this.props;
     const gasPriceIsValid = gasPriceStore.custom.id !== this.state.gasPriceSelected || this.state.validation.gasPrice.valid === VALID
-
-    console.log('gasPriceIsValid', gasPriceIsValid)
+    const isMinCapValid = tierStore.globalMinCap <= tierStore.minSupply
 
     for (let index = 0; index < tierStore.tiers.length; index++) {
       tierStore.validateTiers("endTime", index);
       tierStore.validateTiers("startTime", index);
     }
 
-    if (tierStore.areTiersValid && gasPriceIsValid) {
+    if (!isMinCapValid) {
+      this.setState(update(this.state, {
+        validation: {
+          minCap: {
+            valid: { $set: INVALID }
+          }
+        }
+      }))
+    }
+
+    if (tierStore.areTiersValid && gasPriceIsValid && isMinCapValid) {
       const { reservedTokenStore, deploymentStore } = this.props
       const tiersCount = tierStore.tiers.length
       const reservedCount = reservedTokenStore.tokens.length

src/stores/TierStore.js

@@ -191,6 +191,10 @@ class TierStore {
     whitelist[whitelistNum].deleted = true
     this.setTierProperty(whitelist, 'whitelist', crowdsaleNum)
   }
+
+  @computed get minSupply () {
+    return this.tiers.map(tier => +tier.supply).reduce((a, b) => Math.min(a, b))
+  }
 }
 
 export default TierStore;

src/utils/constants.js

@@ -97,7 +97,7 @@ export const VALIDATION_MESSAGES = {
   EDITED_END_TIME: 'Please enter a valid date later than start time and previous than start time of next tier',
   EDITED_START_TIME: 'Please enter a valid date later than now, less than end time and later than the end time of the previous tier',
   RATE: 'Please enter a valid number greater than 0',
-  MINCAP: 'Value must be positive and decimals should not exceed the amount of decimals specified'
+  MINCAP: 'Value must be positive, decimals should not exceed the amount of decimals specified and min cap should be less or equal than the smaller supply'
 }
 
 //descriptions of input fields