Prices (#15)

* add conveyor price info

* remove comment

* correct getPrices response type and add test stub

* run swift format

* fixup integration test for getPrices endpoint

* CI kick

Sources/Steem/API.swift

@@ -61,6 +61,18 @@ public struct API {
         public init() {}
     }
 
+    public struct SteemPrices: Decodable {
+        public let steemSbd: Float32
+        public let steemUsd: Float32
+        public let steemVest: Float32
+    }
+
+    public struct GetPrices: Request {
+        public typealias Response = SteemPrices
+        public let method = "conveyor.get_prices"
+        public init() {}
+    }
+
     public struct FeedHistory: Decodable {
         public let currentMedianHistory: Price
         public let priceHistory: [Price]

Sources/Steem/Asset.swift

@@ -105,6 +105,7 @@ public struct Price: Equatable, SteemEncodable, Decodable {
             throw PriceError.cannotConvert(asset: asset, usingPrice: self)
         }
     }
+
     public init(base: Asset, quote: Asset) {
         self.base = base
         self.quote = quote

Tests/SteemIntegrationTests/API.swift

@@ -81,6 +81,22 @@ class ClientTest: XCTestCase {
         }
     }
 
+    func testGetPrices() {
+        let test = expectation(description: "Response")
+        let req = API.GetPrices()
+        client.send(req) { res, error in
+            XCTAssertNil(error)
+            XCTAssertNotNil(res)
+            test.fulfill()
+        }
+    
+        waitForExpectations(timeout: 5) { error in
+            if let error = error {
+                print("Error: \(error.localizedDescription)")
+            }
+        }
+    }
+
     func testGetBlock() {
         let test = expectation(description: "Response")
         let req = API.GetBlock(blockNum: 12_345_678)