From 2aeba0a47a871489cfedc2b0d842843752d439ef Mon Sep 17 00:00:00 2001
From: Chris C <104409744+vreff@users.noreply.github.com>
Date: Wed, 18 Jan 2023 14:55:05 -0500
Subject: [PATCH] OCR2VRF - stub juelsperfeecoin (#8263)

---
 .../juelsfeecoin/link_eth_price_provider.go   | 12 +++++++++-
 .../link_eth_price_provider_test.go           | 22 +++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider.go b/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider.go
index 9073b88def5..4b0e40048e3 100644
--- a/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider.go
+++ b/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider.go
@@ -18,6 +18,7 @@ import (
 type linkEthPriceProvider struct {
 	aggregator aggregator_v3_interface.AggregatorV3InterfaceInterface
 	timeout    time.Duration
+	stubbed    bool
 }
 
 var _ types.JuelsPerFeeCoin = (*linkEthPriceProvider)(nil)
@@ -27,10 +28,14 @@ func NewLinkEthPriceProvider(linkEthFeedAddress common.Address, client evmclient
 	if err != nil {
 		return nil, errors.Wrap(err, "new aggregator v3 interface")
 	}
-	return &linkEthPriceProvider{aggregator: aggregator, timeout: timeout}, nil
+	// Return the stubbed implementation, as we are not currently using juelsPerFeeCoin.
+	return &linkEthPriceProvider{aggregator: aggregator, timeout: timeout, stubbed: true}, nil
 }
 
 func (p *linkEthPriceProvider) JuelsPerFeeCoin() (*big.Int, error) {
+	if p.stubbed {
+		return p.juelsPerFeeCoinStubbed()
+	}
 	ctx, cancel := context.WithTimeout(context.Background(), p.timeout)
 	defer cancel()
 	roundData, err := p.aggregator.LatestRoundData(&bind.CallOpts{Context: ctx})
@@ -39,3 +44,8 @@ func (p *linkEthPriceProvider) JuelsPerFeeCoin() (*big.Int, error) {
 	}
 	return roundData.Answer, nil
 }
+
+// Stubbed implementation, returns 0 and does not make an RPC call.
+func (p *linkEthPriceProvider) juelsPerFeeCoinStubbed() (*big.Int, error) {
+	return big.NewInt(0), nil
+}
diff --git a/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider_test.go b/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider_test.go
index f834b3a3a40..13899235836 100644
--- a/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider_test.go
+++ b/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin/link_eth_price_provider_test.go
@@ -38,4 +38,26 @@ func Test_JuelsPerFeeCoin(t *testing.T) {
 		assert.Nil(t, price)
 		assert.Equal(t, "get aggregator latest answer: network failure", err.Error())
 	})
+
+	t.Run("returns juels per fee coin", func(t *testing.T) {
+		latestRoundData := aggregator_v3_interface.LatestRoundData{Answer: big.NewInt(10000)}
+		mockAggregator.On("LatestRoundData", mock.Anything).Return(latestRoundData, nil)
+		p := linkEthPriceProvider{aggregator: mockAggregator, stubbed: true}
+		price, err := p.JuelsPerFeeCoin()
+
+		require.NoError(t, err)
+		assert.Equal(t, int64(0), price.Int64())
+		mockAggregator.AssertNotCalled(t, "LatestRoundData")
+	})
+
+	t.Run("returns error when contract call fails", func(t *testing.T) {
+		latestRoundData := aggregator_v3_interface.LatestRoundData{}
+		mockAggregator.On("LatestRoundData", mock.Anything).Return(latestRoundData, errors.New("network failure"))
+		p := linkEthPriceProvider{aggregator: mockAggregator, stubbed: true}
+		price, err := p.JuelsPerFeeCoin()
+
+		require.NoError(t, err)
+		assert.Zero(t, price.Int64())
+		mockAggregator.AssertNotCalled(t, "LatestRoundData")
+	})
 }