Add abi file and the code to read it

api/service/staking/service.go

@@ -2,7 +2,9 @@ package staking
 
 import (
 	"crypto/ecdsa"
+	"github.com/ethereum/go-ethereum/accounts/abi"
 	"math/big"
+	"os"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -98,6 +100,14 @@ func (s *Service) IsStaked() bool {
 // DoService does staking.
 func (s *Service) DoService() {
 	utils.GetLogInstance().Info("Trying to send a staking transaction.")
+	abi, err := s.getStakeLockContractABI()
+	if err != nil {
+		utils.GetLogInstance().Error("Failed to generate staking contract's ABI", "error", err)
+	} else {
+		utils.GetLogInstance().Info("Generated staking contract's ABI", "abi", abi)
+	}
+	// TODO: use abi to generate staking transaction.
+
 	if s.beaconChain == nil {
 		utils.GetLogInstance().Info("Can not send a staking transaction because of nil beacon chain.")
 		return
@@ -110,6 +120,17 @@ func (s *Service) DoService() {
 	}
 }
 
+func (s *Service) getStakeLockContractABI() (abi.ABI, error) {
+	f, err := os.Open("./contracts/StakeLockContract.json")
+	if err != nil {
+		if os.IsNotExist(err) {
+			return abi.ABI{}, err
+		}
+	}
+	defer f.Close()
+	return abi.JSON(f)
+}
+
 func (s *Service) getStakingInfo() *proto.StakingContractInfoResponse {
 	address := crypto.PubkeyToAddress(s.accountKey.PublicKey)
 	state, err := s.beaconChain.State()

contracts/StakeLockContract.json

@@ -0,0 +1,143 @@
+[
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "listLockedAddresses",
+    "outputs": [
+      {
+        "name": "lockedAddresses",
+        "type": "address[]"
+      },
+      {
+        "name": "blockNums",
+        "type": "uint256[]"
+      },
+      {
+        "name": "lockPeriodCounts",
+        "type": "uint256[]"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "name": "_of",
+        "type": "address"
+      }
+    ],
+    "name": "balanceOf",
+    "outputs": [
+      {
+        "name": "balance",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "currentEpoch",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [],
+    "name": "unlock",
+    "outputs": [
+      {
+        "name": "unlockableTokens",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "name": "_of",
+        "type": "address"
+      }
+    ],
+    "name": "getUnlockableTokens",
+    "outputs": [
+      {
+        "name": "unlockableTokens",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [],
+    "name": "lock",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": true,
+    "stateMutability": "payable",
+    "type": "function"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "name": "_of",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "name": "_amount",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "name": "_epoch",
+        "type": "uint256"
+      }
+    ],
+    "name": "Locked",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "name": "account",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "name": "index",
+        "type": "uint256"
+      }
+    ],
+    "name": "Unlocked",
+    "type": "event"
+  }
+]