feat(price-feeder): add ftx (#1299)

## Description

Adds FTX as a provider

closes: #1276 

---

### Author Checklist

_All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues._

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] added appropriate labels to the PR
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/umee-network/umee/blob/main/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

_All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items._

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed all author checklist items have been addressed
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

price-feeder/CHANGELOG.md

@@ -70,6 +70,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 - [#1175](https://github.com/umee-network/umee/pull/1175) Add ProviderName type to facilitate the reading of maps.
 - [#1215](https://github.com/umee-network/umee/pull/1215) Moved ProviderName to Name in provider package.
 - [#1274](https://github.com/umee-network/umee/pull/1274) Add option to set config by env variables.
+- [#1299](https://github.com/umee-network/umee/pull/1299) Add FTX as a provider.
 
 ## [v0.2.5](https://github.com/umee-network/umee/releases/tag/price-feeder%2Fv0.2.5) - 2022-07-28
 

price-feeder/README.md

@@ -29,6 +29,7 @@ The list of current supported providers:
 
 - [Binance](https://www.binance.com/en)
 - [Coinbase](https://www.coinbase.com/)
+- [FTX](https://ftx.com/)
 - [Gate](https://www.gate.io/)
 - [Huobi](https://www.huobi.com/en-us/)
 - [Kraken](https://www.kraken.com/en-us/)

price-feeder/config/config.go

@@ -38,6 +38,7 @@ var (
 		provider.ProviderHuobi:    {},
 		provider.ProviderGate:     {},
 		provider.ProviderCoinbase: {},
+		provider.ProviderFTX:      {},
 		provider.ProviderMock:     {},
 	}
 

price-feeder/oracle/oracle.go

@@ -277,7 +277,6 @@ func GetComputedPrices(
 	providerPairs map[provider.Name][]types.CurrencyPair,
 	deviations map[string]sdk.Dec,
 ) (prices map[string]sdk.Dec, err error) {
-
 	// convert any non-USD denominated candles into USD
 	convertedCandles, err := convertCandlesToUSD(
 		logger,
@@ -467,6 +466,9 @@ func NewProvider(
 	case provider.ProviderGate:
 		return provider.NewGateProvider(ctx, logger, endpoint, providerPairs...)
 
+	case provider.ProviderFTX:
+		return provider.NewFTXProvider(ctx, logger, endpoint, providerPairs...), nil
+
 	case provider.ProviderMock:
 		return provider.NewMockProvider(), nil
 	}

price-feeder/oracle/provider/coinbase.go

@@ -24,7 +24,7 @@ const (
 	coinbasePingCheck = time.Second * 28 // should be < 30
 	coinbaseRestHost  = "https://api.exchange.coinbase.com"
 	coinbaseRestPath  = "/products"
-	timeLayout        = "2006-01-02T15:04:05.000000Z"
+	coinbaseTimeFmt   = "2006-01-02T15:04:05.000000Z"
 	unixMinute        = 60000
 )
 
@@ -408,7 +408,7 @@ func (p *CoinbaseProvider) messageReceived(messageType int, bz []byte) {
 
 // timeToUnix converts a Time in format "2006-01-02T15:04:05.000000Z" to unix
 func (tr CoinbaseTradeResponse) timeToUnix() int64 {
-	t, err := time.Parse(timeLayout, tr.Time)
+	t, err := time.Parse(coinbaseTimeFmt, tr.Time)
 	if err != nil {
 		return 0
 	}