Add helper functions for confirmation status

app/helpers/contribution-status.js

@@ -0,0 +1,20 @@
+import Helper from '@ember/component/helper';
+import { inject as service } from '@ember/service';
+import { alias } from '@ember/object/computed';
+
+export default Helper.extend({
+
+  kredits: service(),
+  currentBlock: alias('kredits.currentBlock'),
+
+  compute([contribution]) {
+    if (contribution.vetoed) {
+      return 'vetoed';
+    } else if (contribution.confirmedAt > this.currentBlock) {
+      return 'unconfirmed';
+    } else {
+      return 'confirmed'
+    }
+  }
+
+});

app/helpers/is-confirmed-contribution.js

@@ -0,0 +1,15 @@
+import Helper from '@ember/component/helper';
+import { inject as service } from '@ember/service';
+import { alias } from '@ember/object/computed';
+
+export default Helper.extend({
+
+  kredits: service(),
+  currentBlock: alias('kredits.currentBlock'),
+
+  compute([contribution]) {
+    return !contribution.vetoed &&
+           (contribution.confirmedAt <= this.currentBlock);
+  }
+
+});

tests/unit/helpers/contribution-status.js

@@ -0,0 +1,21 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+
+module('Unit | Helper | contribution-status', function (hooks) {
+  setupTest(hooks);
+
+  test('returns the appropriate status', function (assert) {
+    const contributionStatus = this.owner.factoryFor('helper:contribution-status').create();
+    const kredits = this.owner.lookup('service:kredits');
+
+    kredits.set('currentBlock', 23000);
+
+    const contributionUnconfirmed = { confirmedAt: 23001, vetoed: false };
+    const contributionConfirmed   = { confirmedAt: 21000, vetoed: false };
+    const contributionVetoed      = { confirmedAt: 23001, vetoed: true };
+
+    assert.eq(contributionStatus.compute([contributionUnconfirmed]), 'unconfirmed');
+    assert.eq(contributionStatus.compute([contributionConfirmed]), 'confirmed');
+    assert.eq(contributionStatus.compute([contributionVetoed]), 'vetoed');
+  });
+});

tests/unit/helpers/is-confirmed-contribution.js

@@ -0,0 +1,21 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+
+module('Unit | Helper | contribution-status', function (hooks) {
+  setupTest(hooks);
+
+  test('returns the appropriate status', function (assert) {
+    const contributionStatus = this.owner.factoryFor('helper:contribution-status').create();
+    const kredits = this.owner.lookup('service:kredits');
+
+    kredits.set('currentBlock', 23000);
+
+    const contributionUnconfirmed = { confirmedAt: 23001, vetoed: false };
+    const contributionConfirmed   = { confirmedAt: 21000, vetoed: false };
+    const contributionVetoed      = { confirmedAt: 23001, vetoed: true };
+
+    assert.notOk(contributionStatus.compute([contributionUnconfirmed]), 'unconfirmed');
+    assert.notOk(contributionStatus.compute([contributionVetoed]), 'vetoed');
+    assert.ok(contributionStatus.compute([contributionConfirmed]), 'confirmed');
+  });
+});