diff --git a/CKB.xcodeproj/project.pbxproj b/CKB.xcodeproj/project.pbxproj
index ad25d0e..f7d2f45 100644
--- a/CKB.xcodeproj/project.pbxproj
+++ b/CKB.xcodeproj/project.pbxproj
@@ -71,6 +71,8 @@
 		1A4AEBDB2282EB0100F0D576 /* TxPoolInfo.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1A4AEBDA2282EB0100F0D576 /* TxPoolInfo.swift */; };
 		1A54E26122EEA9DE008CF6C3 /* setBan.json in Resources */ = {isa = PBXBuildFile; fileRef = 1A55D39C22EEA7CC00E2B8DE /* setBan.json */; };
 		1A54E26222EEA9E1008CF6C3 /* getBannedAddresses.json in Resources */ = {isa = PBXBuildFile; fileRef = 1A55D39E22EEA7F300E2B8DE /* getBannedAddresses.json */; };
+		1A54E26622EEB4D4008CF6C3 /* BlockReward.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1A54E26522EEB4D4008CF6C3 /* BlockReward.swift */; };
+		1A54E26822EEB5BA008CF6C3 /* blockReward.json in Resources */ = {isa = PBXBuildFile; fileRef = 1A54E26722EEB5BA008CF6C3 /* blockReward.json */; };
 		1A55D39B22EEA69F00E2B8DE /* BannedAddress.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1A55D39A22EEA69F00E2B8DE /* BannedAddress.swift */; };
 		1A5BCBB3228C571200157426 /* Transaction+Sign.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1A5BCBB2228C571200157426 /* Transaction+Sign.swift */; };
 		1AA9B6842283CD4C00C116B2 /* ChainInfo.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1AA9B6832283CD4C00C116B2 /* ChainInfo.swift */; };
@@ -149,6 +151,8 @@
 		1A4AEBDA2282EB0100F0D576 /* TxPoolInfo.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TxPoolInfo.swift; sourceTree = "<group>"; };
 		1A4AEBDC2282EC9700F0D576 /* txPoolInfo.json */ = {isa = PBXFileReference; lastKnownFileType = text.json; path = txPoolInfo.json; sourceTree = "<group>"; };
 		1A4AEBDE2282EF7500F0D576 /* peers.json */ = {isa = PBXFileReference; lastKnownFileType = text.json; path = peers.json; sourceTree = "<group>"; };
+		1A54E26522EEB4D4008CF6C3 /* BlockReward.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; name = BlockReward.swift; path = "../../../../../../System/Volumes/Data/Users/james/Projects/ckb-sdk-swift/Source/Types/BlockReward.swift"; sourceTree = "<group>"; };
+		1A54E26722EEB5BA008CF6C3 /* blockReward.json */ = {isa = PBXFileReference; lastKnownFileType = text.json; name = blockReward.json; path = "../../../../../../../System/Volumes/Data/Users/james/Projects/ckb-sdk-swift/Tests/API/RPC Fixtures/blockReward.json"; sourceTree = "<group>"; };
 		1A55D39A22EEA69F00E2B8DE /* BannedAddress.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; name = BannedAddress.swift; path = "../../../../../../System/Volumes/Data/Users/james/Projects/ckb-sdk-swift/Source/Types/BannedAddress.swift"; sourceTree = "<group>"; };
 		1A55D39C22EEA7CC00E2B8DE /* setBan.json */ = {isa = PBXFileReference; lastKnownFileType = text.json; name = setBan.json; path = "../../../../../../../System/Volumes/Data/Users/james/Projects/ckb-sdk-swift/Tests/API/RPC Fixtures/setBan.json"; sourceTree = "<group>"; };
 		1A55D39E22EEA7F300E2B8DE /* getBannedAddresses.json */ = {isa = PBXFileReference; lastKnownFileType = text.json; name = getBannedAddresses.json; path = "../../../../../../../System/Volumes/Data/Users/james/Projects/ckb-sdk-swift/Tests/API/RPC Fixtures/getBannedAddresses.json"; sourceTree = "<group>"; };
@@ -253,6 +257,7 @@
 				1A2CDAE22281796D0024CA71 /* epoch.json */,
 				1A58F43C2276981700C6546F /* transaction.json */,
 				1A58F43E2276994000C6546F /* header.json */,
+				1A54E26722EEB5BA008CF6C3 /* blockReward.json */,
 				1A58F4402276998900C6546F /* tipBlockNumber.json */,
 				1A58F442227699D400C6546F /* sendTransactionEmpty.json */,
 				1A58F44422769A0600C6546F /* localNodeInfo.json */,
@@ -361,6 +366,7 @@
 				1A2188732288FC1700F613CF /* DryRunResult.swift */,
 				1A199DEA22BA3225000C0C34 /* LockHashIndexState.swift */,
 				1A55D39A22EEA69F00E2B8DE /* BannedAddress.swift */,
+				1A54E26522EEB4D4008CF6C3 /* BlockReward.swift */,
 			);
 			path = Types;
 			sourceTree = "<group>";
@@ -570,6 +576,7 @@
 				1A2D6B3622A35C5A00724E66 /* computeTransactionHash.json in Resources */,
 				1A2D6B3B22A35C6400724E66 /* pubkey.json in Resources */,
 				1A2D6B3422A35C5A00724E66 /* peersState.json in Resources */,
+				1A54E26822EEB5BA008CF6C3 /* blockReward.json in Resources */,
 				1A2D6B3322A35C5A00724E66 /* blockchainInfo.json in Resources */,
 				1A2D6B2822A35C5A00724E66 /* genesisBlockHash.json in Resources */,
 				1A54E26222EEA9E1008CF6C3 /* getBannedAddresses.json in Resources */,
@@ -716,6 +723,7 @@
 				1A199DEB22BA3225000C0C34 /* LockHashIndexState.swift in Sources */,
 				1A414A9621C37AA000B28C09 /* Script.swift in Sources */,
 				1AB7516822B9F2DB00AC9F63 /* APIClient+Pool.swift in Sources */,
+				1A54E26622EEB4D4008CF6C3 /* BlockReward.swift in Sources */,
 				1A55D39B22EEA69F00E2B8DE /* BannedAddress.swift in Sources */,
 				1AD3195D225DBA0B00F41790 /* AddressGenerator.swift in Sources */,
 				1A414AA021C770DD00B28C09 /* Utils.swift in Sources */,
diff --git a/Source/API/APIClient+Chain.swift b/Source/API/APIClient+Chain.swift
index 9da41a9..57317ae 100644
--- a/Source/API/APIClient+Chain.swift
+++ b/Source/API/APIClient+Chain.swift
@@ -54,4 +54,8 @@ public extension APIClient {
     func getEpochByNumber(number: EpochNumber) throws -> Epoch {
         return try load(APIRequest<Epoch>(method: "get_epoch_by_number", params: [number]))
     }
+
+    func getCellbaseOutputCapacityDetails(blockHash: H256) throws -> BlockReward {
+        return try load(APIRequest<BlockReward>(method: "get_cellbase_output_capacity_details", params: [blockHash]))
+    }
 }
diff --git a/Source/Types/BlockReward.swift b/Source/Types/BlockReward.swift
new file mode 100644
index 0000000..58dfeb7
--- /dev/null
+++ b/Source/Types/BlockReward.swift
@@ -0,0 +1,23 @@
+//
+//  BlockReward.swift
+//
+//  Copyright © 2019 Nervos Foundation. All rights reserved.
+//
+
+import Foundation
+
+public struct BlockReward: Codable {
+    public let proposalReward: Capacity
+    public let primary: Capacity
+    public let secondary: Capacity
+    public let total: Capacity
+    public let txFee: Capacity
+
+    enum CodingKeys: String, CodingKey {
+        case proposalReward = "proposal_reward"
+        case primary
+        case secondary
+        case total
+        case txFee = "tx_fee"
+    }
+}
diff --git a/Tests/API/APIClientTests.swift b/Tests/API/APIClientTests.swift
index f2a38ab..6e31eab 100644
--- a/Tests/API/APIClientTests.swift
+++ b/Tests/API/APIClientTests.swift
@@ -55,6 +55,13 @@ class APIClientTests: RPCTestSkippable {
         XCTAssertNil(try? client.getTransaction(hash: nonexistentHash))
     }
 
+    func testGetCellbaseOutputCapacityDetails() throws {
+        let tipHeader = try client.getTipHeader()
+        let result = try client.getCellbaseOutputCapacityDetails(blockHash: tipHeader.hash)
+        XCTAssertNotNil(result)
+        XCTAssert(Int64(result.txFee)! >= 0)
+    }
+
     func testGetBlockHash() throws {
         let result = try client.getBlockHash(number: "0")
         XCTAssertNotNil(result)
diff --git a/Tests/API/APIMockingTests.swift b/Tests/API/APIMockingTests.swift
index e27f02c..619675b 100644
--- a/Tests/API/APIMockingTests.swift
+++ b/Tests/API/APIMockingTests.swift
@@ -41,6 +41,12 @@ class APIMockingTests: XCTestCase {
         XCTAssertNotNil(result)
     }
 
+    func testGetCellbaseOutputCapacityDetails() throws {
+        let result = try getClient(json: "blockReward").getCellbaseOutputCapacityDetails(blockHash: "0xba0d878d2c3711d38b5ddc2bc917312ca3898cad98457cc7960e28ec31f26e7f")
+        XCTAssertNotNil(result)
+        XCTAssert(Int64(result.txFee)! >= 0)
+    }
+
     func testGetBlockHash() throws {
         let result = try? getClient(json: "genesisBlockHash").getBlockHash(number: "0")
         XCTAssertNotNil(result)
diff --git a/Tests/API/RPC Fixtures/blockReward.json b/Tests/API/RPC Fixtures/blockReward.json
new file mode 100644
index 0000000..923e73e
--- /dev/null
+++ b/Tests/API/RPC Fixtures/blockReward.json	
@@ -0,0 +1,11 @@
+{
+    "id": 1,
+    "jsonrpc": "2.0",
+    "result": {
+        "primary": "100000000000",
+        "proposal_reward": "0",
+        "secondary": "3936000",
+        "total": "100003936000",
+        "tx_fee": "0"
+    }
+}