core: vm: add minStake to governance contract variable (#31)

2 files changed, 42 insertions, 1 deletions

diff --git a/core/genesis_alloc.go b/core/genesis_alloc.go
index ffe360457..b4b2732dd 100644
--- a/core/genesis_alloc.go
+++ b/core/genesis_alloc.go
@@ -21,6 +21,6 @@ package core
 // Use mkalloc.go to create/update them.
 
 // nolint: misspell
-const mainnetAllocData = "\xf9\x03+\xe9\x94\x12E\xa8g/\xa8\x81\u03c5\x8e\xf0\x1d4\xc4+U\u0672c\xff\u04ca\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\x80\x80\u0100\x80\x80\x80\xf8\xa9\x946\x1eIX\xbd\x8bM\x03\\h\xc4s\x19>w\xfd\xabj\xea\x9d\xf8\x92\x8965\u026d\xc5\u07a0\x00\x00\x89\x1b\x1a\xe4\xd6\xe2\xefP\x00\x00\x80\xb8A\x04\f/\a\xcf\"\x96n\xba\xa1\x9d\xd8}\xe1\x1d\x04\xf9\xa6\x06\xe8>u\xa5)Utv\nZM\xd8(\a\xe7\xd9\xf2\x8f\x86\xcd8\x98q\u0753\x1aG|\xacd\xe23\xa6\xf0\x98\u0572W\x87\x1d\x81c\xdc\x1b\xdd\xcf\xf88\x86DEXON1\x8fnode1@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\xf8\xa9\x94\xb6\xa2\xe2p\xb5O\x19\xb4\x00-e5\xa7\x1c\xfd\xd1\xca\x1f_\xc1\xf8\x92\x8965\u026d\xc5\u07a0\x00\x00\x89\x1b\x1a\xe4\xd6\xe2\xefP\x00\x00\x80\xb8A\x04c\xf7\x8d9\x8fk\x04)R\x06*&\xf3U\x1aN)J\x11\bK\x10\x06\xc8\xd67d7\xb7$\x88\xd8\xf3\xafk\x84\x991\xc06$\xad-X\x19\x00\xe9\xad_<\xfe\xee\xd0@\u01d9\xe50\x8c\xd8\x01(S\xfb\xf88\x86DEXON3\x8fnode3@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\xf8\xa9\x94\xb6\xbb\xbe9\x0311\xe4(\u0563TXV\xa5\x96\xca\xcbx\x10\xf8\x92\x8965\u026d\xc5\u07a0\x00\x00\x89\x1b\x1a\xe4\xd6\xe2\xefP\x00\x00\x80\xb8A\x04\xa1\x11\x8c\x8f\x1c.)=\xe5(\xe5\xb4Z\xc5\xe6Qg\xafL\xb4\xd1\b\x87\x92J\x9f\x83\x92\x87\xd0`\xda&AN\x97\x1c\xabu\x01>V\r\xfe\u01c9{\x19\x83\xea\xa61\xae/\x16\xea@bRS\x10\xed\xd8\xea\xf88\x86DEXON4\x8fnode4@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\xf8\xa9\x94\xbcq\xc0\xf2\xae\xcaF\xfa\x00\x01\xe7e\x96P)\xb1j\x06\x04\x9e\xf8\x92\x8965\u026d\xc5\u07a0\x00\x00\x89\x1b\x1a\xe4\xd6\xe2\xefP\x00\x00\x80\xb8A\x04\xa1*\x01_'\u064eS\x05I\x8d#\xae\xac\xde(\x1eH\xaa\xd9\x18\xae\x87\xd7\xf6\x17\x84\xabC\x82\x89S\u06d9\xbf\x1fDBb\x94\xcb\xc2\x1e2\xcf:\x99\x12/,\xe8\xa3[\xa7\x18\xa7\xc8\x14\xee\u01fa\xe9\xa3\xea\xf88\x86DEXON2\x8fnode2@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\u953f\x8cH\xa6 \xba\xccF\x90\u007f\x9b\x89s-%\xe4z-|\xf7\u04ca\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\x80\x80\u0100\x80\x80\x80\xea\x94\xe0\xf8Y4\x03S\x85F\x93\xf57\xea3q\x06\xa3>\x9f\xea\xb0\u050bR\xb7\xd2\xdc\xc8\f\xd2\xe4\x00\x00\x00\x80\x80\x80\u0100\x80\x80\x80"
+const mainnetAllocData = "\xf9\x033\xe9\x94\x12E\xa8g/\xa8\x81\u03c5\x8e\xf0\x1d4\xc4+U\u0672c\xff\u04ca\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\x80\x80\u0100\x80\x80\x80\xf8\xab\x946\x1eIX\xbd\x8bM\x03\\h\xc4s\x19>w\xfd\xabj\xea\x9d\xf8\x94\x8a*Z\x05\x8f\u0095\xed\x00\x00\x00\x8a\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\xb8A\x04\f/\a\xcf\"\x96n\xba\xa1\x9d\xd8}\xe1\x1d\x04\xf9\xa6\x06\xe8>u\xa5)Utv\nZM\xd8(\a\xe7\xd9\xf2\x8f\x86\xcd8\x98q\u0753\x1aG|\xacd\xe23\xa6\xf0\x98\u0572W\x87\x1d\x81c\xdc\x1b\xdd\xcf\xf88\x86DEXON1\x8fnode1@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\xf8\xab\x94\xb6\xa2\xe2p\xb5O\x19\xb4\x00-e5\xa7\x1c\xfd\xd1\xca\x1f_\xc1\xf8\x94\x8a*Z\x05\x8f\u0095\xed\x00\x00\x00\x8a\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\xb8A\x04c\xf7\x8d9\x8fk\x04)R\x06*&\xf3U\x1aN)J\x11\bK\x10\x06\xc8\xd67d7\xb7$\x88\xd8\xf3\xafk\x84\x991\xc06$\xad-X\x19\x00\xe9\xad_<\xfe\xee\xd0@\u01d9\xe50\x8c\xd8\x01(S\xfb\xf88\x86DEXON3\x8fnode3@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\xf8\xab\x94\xb6\xbb\xbe9\x0311\xe4(\u0563TXV\xa5\x96\xca\xcbx\x10\xf8\x94\x8a*Z\x05\x8f\u0095\xed\x00\x00\x00\x8a\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\xb8A\x04\xa1\x11\x8c\x8f\x1c.)=\xe5(\xe5\xb4Z\xc5\xe6Qg\xafL\xb4\xd1\b\x87\x92J\x9f\x83\x92\x87\xd0`\xda&AN\x97\x1c\xabu\x01>V\r\xfe\u01c9{\x19\x83\xea\xa61\xae/\x16\xea@bRS\x10\xed\xd8\xea\xf88\x86DEXON4\x8fnode4@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\xf8\xab\x94\xbcq\xc0\xf2\xae\xcaF\xfa\x00\x01\xe7e\x96P)\xb1j\x06\x04\x9e\xf8\x94\x8a*Z\x05\x8f\u0095\xed\x00\x00\x00\x8a\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\xb8A\x04\xa1*\x01_'\u064eS\x05I\x8d#\xae\xac\xde(\x1eH\xaa\xd9\x18\xae\x87\xd7\xf6\x17\x84\xabC\x82\x89S\u06d9\xbf\x1fDBb\x94\xcb\xc2\x1e2\xcf:\x99\x12/,\xe8\xa3[\xa7\x18\xa7\xc8\x14\xee\u01fa\xe9\xa3\xea\xf88\x86DEXON2\x8fnode2@dexon.org\x8eTaipei, Taiwan\x91https://dexon.org\u953f\x8cH\xa6 \xba\xccF\x90\u007f\x9b\x89s-%\xe4z-|\xf7\u04ca\x15-\x02\xc7\xe1J\xf6\x80\x00\x00\x80\x80\x80\u0100\x80\x80\x80\xea\x94\xe0\xf8Y4\x03S\x85F\x93\xf57\xea3q\x06\xa3>\x9f\xea\xb0\u050bR\xb7\xd2\xdc\xc8\f\xd2\xe4\x00\x00\x00\x80\x80\x80\u0100\x80\x80\x80"
 
 const testnetAllocData = mainnetAllocData
diff --git a/core/vm/governance.go b/core/vm/governance.go
index f406294d2..cbc7f458f 100644
--- a/core/vm/governance.go
+++ b/core/vm/governance.go
@@ -165,6 +165,20 @@ const GovernanceABIJSON = `
   },
   {
     "constant": true,
+    "inputs": [],
+    "name": "minStake",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
     "inputs": [
       {
         "name": "",
@@ -438,6 +452,10 @@ const GovernanceABIJSON = `
     "constant": false,
     "inputs": [
       {
+        "name": "MinStake",
+        "type": "uint256"
+      },
+      {
         "name": "BlockReward",
         "type": "uint256"
       },
@@ -870,6 +888,12 @@ func RunGovernanceContract(evm *EVM, input []byte, contract *Contract) (
 			return nil, errExecutionReverted
 		}
 		return res, nil
+	case "minStake":
+		res, err := method.Outputs.Pack(g.state.MinStake())
+		if err != nil {
+			return nil, errExecutionReverted
+		}
+		return res, nil
 	case "numChains":
 		res, err := method.Outputs.Pack(g.state.NumChains())
 		if err != nil {
@@ -948,6 +972,7 @@ const (
 	dkgFinalizedLoc
 	dkgFinalizedsCountLoc
 	ownerLoc
+	minStakeLoc
 	blockRewardLoc
 	blockGasLimitLoc
 	numChainsLoc
@@ -1320,6 +1345,14 @@ func (s *GovernanceStateHelper) SetOwner(newOwner common.Address) {
 	s.setState(common.BigToHash(big.NewInt(ownerLoc)), newOwner.Hash())
 }
 
+// uint256 public minStake;
+func (s *GovernanceStateHelper) MinStake() *big.Int {
+	return s.getStateBigInt(big.NewInt(minStakeLoc))
+}
+func (s *GovernanceStateHelper) SetMinStake(stake *big.Int) {
+	s.setStateBigInt(big.NewInt(minStakeLoc), stake)
+}
+
 // uint256 public blockReward;
 func (s *GovernanceStateHelper) BlockReward() *big.Int {
 	return s.getStateBigInt(big.NewInt(blockRewardLoc))
@@ -1401,6 +1434,7 @@ func (s *GovernanceStateHelper) Stake(
 // Configuration returns the current configuration.
 func (s *GovernanceStateHelper) Configuration() *params.DexconConfig {
 	return &params.DexconConfig{
+		MinStake:         s.getStateBigInt(big.NewInt(minStakeLoc)),
 		BlockReward:      s.getStateBigInt(big.NewInt(blockRewardLoc)),
 		BlockGasLimit:    uint64(s.getStateBigInt(big.NewInt(blockGasLimitLoc)).Uint64()),
 		NumChains:        uint32(s.getStateBigInt(big.NewInt(numChainsLoc)).Uint64()),
@@ -1417,6 +1451,7 @@ func (s *GovernanceStateHelper) Configuration() *params.DexconConfig {
 
 // UpdateConfiguration updates system configuration.
 func (s *GovernanceStateHelper) UpdateConfiguration(cfg *params.DexconConfig) {
+	s.setStateBigInt(big.NewInt(minStakeLoc), cfg.MinStake)
 	s.setStateBigInt(big.NewInt(blockRewardLoc), cfg.BlockReward)
 	s.setStateBigInt(big.NewInt(blockGasLimitLoc), big.NewInt(int64(cfg.BlockGasLimit)))
 	s.setStateBigInt(big.NewInt(numChainsLoc), big.NewInt(int64(cfg.NumChains)))
@@ -1643,6 +1678,12 @@ func (g *GovernanceContract) stake(
 	caller := g.contract.Caller()
 	offset := g.state.Offset(caller)
 
+	// Need to stake at least minStake.
+	if g.contract.Value().Cmp(g.state.MinStake()) < 0 {
+		g.penalize()
+		return nil, errExecutionReverted
+	}
+
 	// Can not stake if already staked.
 	if offset.Cmp(big.NewInt(0)) >= 0 {
 		g.penalize()