apply mulit-coin universally

16 files changed, 177 insertions, 118 deletions

diff --git a/core/evm.go b/core/evm.go
index 74891d7..78f36e0 100644
--- a/core/evm.go
+++ b/core/evm.go
@@ -23,7 +23,7 @@ import (
 	"github.com/ava-labs/coreth/core/types"
 	"github.com/ava-labs/coreth/core/vm"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/log"
+	//"github.com/ethereum/go-ethereum/log"
 )
 
 // ChainContext supports retrieving headers and consensus parameters from the
@@ -105,14 +105,6 @@ func CanTransferMC(db vm.StateDB, addr common.Address, to common.Address, coinID
 	if coinID == nil {
 		return 0
 	}
-	if !db.IsMultiCoin(addr) {
-		err := db.EnableMultiCoin(addr)
-		log.Debug("try to enable MC", "addr", addr.Hex(), "err", err)
-	}
-	if !(db.IsMultiCoin(addr) && db.IsMultiCoin(to)) {
-		// incompatible
-		return -1
-	}
 	if db.GetBalanceMultiCoin(addr, *coinID).Cmp(amount) >= 0 {
 		return 0
 	}
diff --git a/core/genesis.go b/core/genesis.go
index e48f411..9b96480 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -268,7 +268,7 @@ func (g *Genesis) ToBlock(db ethdb.Database) *types.Block {
 			statedb.SetState(addr, key, value)
 		}
 		if account.MCBalance != nil {
-			statedb.ForceEnableMultiCoin(addr)
+			//statedb.ForceEnableMultiCoin(addr)
 			for coinID, value := range account.MCBalance {
 				statedb.AddBalanceMultiCoin(addr, coinID, value)
 			}
diff --git a/core/state/journal.go b/core/state/journal.go
index 0cc556b..be27493 100644
--- a/core/state/journal.go
+++ b/core/state/journal.go
@@ -185,7 +185,7 @@ func (ch balanceChange) dirtied() *common.Address {
 }
 
 func (ch multiCoinEnable) revert(s *StateDB) {
-	s.getStateObject(*ch.account).data.IsMultiCoin = false
+	//s.getStateObject(*ch.account).data.IsMultiCoin = false
 }
 
 func (ch multiCoinEnable) dirtied() *common.Address {
diff --git a/core/state/state_object.go b/core/state/state_object.go
index 2893f80..9772859 100644
--- a/core/state/state_object.go
+++ b/core/state/state_object.go
@@ -438,9 +438,9 @@ func (s *stateObject) setBalance(amount *big.Int) {
 	s.data.Balance = amount
 }
 
-func (s *stateObject) enableMultiCoin() {
-	s.data.IsMultiCoin = true
-}
+//func (s *stateObject) enableMultiCoin() {
+//	s.data.IsMultiCoin = true
+//}
 
 // Return the gas back to the origin. Used by the Virtual machine or Closures
 func (s *stateObject) ReturnGas(gas *big.Int) {}
@@ -538,9 +538,9 @@ func (s *stateObject) Balance() *big.Int {
 	return s.data.Balance
 }
 
-func IsMultiCoinKey(key common.Hash) bool {
-	return key[0]&0x01 == 0x01
-}
+//func IsMultiCoinKey(key common.Hash) bool {
+//	return key[0]&0x01 == 0x01
+//}
 
 func NormalizeCoinID(coinID *common.Hash) {
 	coinID[0] |= 0x01
@@ -555,16 +555,16 @@ func (s *stateObject) BalanceMultiCoin(coinID common.Hash, db Database) *big.Int
 	return s.GetState(db, coinID).Big()
 }
 
-func (s *stateObject) EnableMultiCoin() bool {
-	if s.data.IsMultiCoin {
-		return false
-	}
-	s.db.journal.append(multiCoinEnable{
-		account: &s.address,
-	})
-	s.enableMultiCoin()
-	return true
-}
+//func (s *stateObject) EnableMultiCoin() bool {
+//	if s.data.IsMultiCoin {
+//		return false
+//	}
+//	s.db.journal.append(multiCoinEnable{
+//		account: &s.address,
+//	})
+//	s.enableMultiCoin()
+//	return true
+//}
 
 func (s *stateObject) IsMultiCoin() bool {
 	return s.data.IsMultiCoin
diff --git a/core/state/statedb.go b/core/state/statedb.go
index dbf0870..c4d926d 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -267,29 +267,30 @@ func (self *StateDB) GetBalanceMultiCoin(addr common.Address, coinID common.Hash
 	return common.Big0
 }
 
-func (self *StateDB) EnableMultiCoin(addr common.Address) error {
-	stateObject := self.GetOrNewStateObject(addr)
-	if stateObject.data.Root != emptyRoot && stateObject.data.Root != zeroRoot {
-		return errors.New(fmt.Sprintf("not a fresh account: %s", stateObject.data.Root.Hex()))
-	}
-	if !stateObject.EnableMultiCoin() {
-		return errors.New("multi-coin mode already enabled")
-	}
-	log.Debug(fmt.Sprintf("enabled MC for %s", addr.Hex()))
-	return nil
-}
-
-func (self *StateDB) ForceEnableMultiCoin(addr common.Address) {
-	stateObject := self.GetOrNewStateObject(addr)
-	stateObject.EnableMultiCoin()
-}
+//func (self *StateDB) EnableMultiCoin(addr common.Address) error {
+//	stateObject := self.GetOrNewStateObject(addr)
+//	if stateObject.data.Root != emptyRoot && stateObject.data.Root != zeroRoot {
+//		return errors.New(fmt.Sprintf("not a fresh account: %s", stateObject.data.Root.Hex()))
+//	}
+//	if !stateObject.EnableMultiCoin() {
+//		return errors.New("multi-coin mode already enabled")
+//	}
+//	log.Debug(fmt.Sprintf("enabled MC for %s", addr.Hex()))
+//	return nil
+//}
+//
+//func (self *StateDB) ForceEnableMultiCoin(addr common.Address) {
+//	stateObject := self.GetOrNewStateObject(addr)
+//	stateObject.EnableMultiCoin()
+//}
 
 func (self *StateDB) IsMultiCoin(addr common.Address) bool {
-	stateObject := self.getStateObject(addr)
-	if stateObject != nil {
-		return stateObject.IsMultiCoin()
-	}
-	return false
+	return true
+	//stateObject := self.getStateObject(addr)
+	//if stateObject != nil {
+	//	return stateObject.IsMultiCoin()
+	//}
+	//return false
 }
 
 func (s *StateDB) GetNonce(addr common.Address) uint64 {
@@ -339,6 +340,10 @@ func (s *StateDB) GetCodeHash(addr common.Address) common.Hash {
 func (s *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash {
 	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
+		// NOTE: last-minute fix: just universally enable MC
+		//if stateObject.data.IsMultiCoin {
+		NormalizeStateKey(&hash)
+		//}
 		return stateObject.GetState(s.db, hash)
 	}
 	return common.Hash{}
@@ -425,9 +430,6 @@ func (s *StateDB) SetBalance(addr common.Address, amount *big.Int) {
 
 // AddBalance adds amount to the account associated with addr.
 func (s *StateDB) AddBalanceMultiCoin(addr common.Address, coinID common.Hash, amount *big.Int) {
-	if !s.IsMultiCoin(addr) {
-		s.EnableMultiCoin(addr)
-	}
 	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
 		stateObject.AddBalanceMultiCoin(coinID, amount, s.db)
@@ -467,9 +469,10 @@ func (s *StateDB) SetState(addr common.Address, key, value common.Hash) (res err
 	res = nil
 	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
-		if stateObject.data.IsMultiCoin {
-			NormalizeStateKey(&key)
-		}
+		// NOTE: last-minute fix: just universally enable MC
+		//if stateObject.data.IsMultiCoin {
+		NormalizeStateKey(&key)
+		//}
 		stateObject.SetState(s.db, key, value)
 	}
 	return
diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index abfa2aa..e1eb25e 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -881,9 +881,9 @@ func opSuicide(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([
 	return nil, nil
 }
 
-func opEMC(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) {
-	return nil, interpreter.evm.StateDB.EnableMultiCoin(callContext.contract.Address())
-}
+//func opEMC(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) {
+//	return nil, interpreter.evm.StateDB.EnableMultiCoin(callContext.contract.Address())
+//}
 
 // following functions are used by the instruction jump  table
 
diff --git a/core/vm/interface.go b/core/vm/interface.go
index 4f95423..05faac1 100644
--- a/core/vm/interface.go
+++ b/core/vm/interface.go
@@ -34,8 +34,6 @@ type StateDB interface {
 	SubBalanceMultiCoin(common.Address, common.Hash, *big.Int)
 	AddBalanceMultiCoin(common.Address, common.Hash, *big.Int)
 	GetBalanceMultiCoin(common.Address, common.Hash) *big.Int
-	EnableMultiCoin(common.Address) error
-	IsMultiCoin(common.Address) bool
 
 	GetNonce(common.Address) uint64
 	SetNonce(common.Address, uint64)
diff --git a/core/vm/jump_table.go b/core/vm/jump_table.go
index 7e3e354..9b538d4 100644
--- a/core/vm/jump_table.go
+++ b/core/vm/jump_table.go
@@ -558,12 +558,12 @@ func newFrontierInstructionSet() JumpTable {
 			minStack:    minStack(0, 0),
 			maxStack:    maxStack(0, 0),
 		},
-		EMC: {
-			execute:     opEMC,
-			constantGas: params.EMCGas,
-			minStack:    minStack(0, 0),
-			maxStack:    maxStack(0, 0),
-		},
+		//EMC: {
+		//	execute:     opEMC,
+		//	constantGas: params.EMCGas,
+		//	minStack:    minStack(0, 0),
+		//	maxStack:    maxStack(0, 0),
+		//},
 		PUSH1: {
 			execute:     opPush1,
 			constantGas: GasFastestStep,
diff --git a/core/vm/opcodes.go b/core/vm/opcodes.go
index 99688b1..c5097f8 100644
--- a/core/vm/opcodes.go
+++ b/core/vm/opcodes.go
@@ -210,8 +210,8 @@ const (
 
 const (
 	BALANCEMC = 0xcd
-	EMC       = 0xce
-	CALLEX    = 0xcf
+	//EMC       = 0xce
+	CALLEX = 0xcf
 )
 
 // 0xf0 range - closures.
@@ -385,9 +385,9 @@ var opCodeToString = map[OpCode]string{
 	LOG4:   "LOG4",
 
 	// 0xf0 range.
-	CREATE:       "CREATE",
-	CALL:         "CALL",
-	EMC:          "EMC",
+	CREATE: "CREATE",
+	CALL:   "CALL",
+	//EMC:          "EMC",
 	CALLEX:       "CALLEX",
 	RETURN:       "RETURN",
 	CALLCODE:     "CALLCODE",
@@ -553,12 +553,12 @@ var stringToOp = map[string]OpCode{
 	"CREATE":         CREATE,
 	"CREATE2":        CREATE2,
 	"CALL":           CALL,
-	"EMC":            EMC,
-	"CALLEX":         CALLEX,
-	"RETURN":         RETURN,
-	"CALLCODE":       CALLCODE,
-	"REVERT":         REVERT,
-	"SELFDESTRUCT":   SELFDESTRUCT,
+	//"EMC":            EMC,
+	"CALLEX":       CALLEX,
+	"RETURN":       RETURN,
+	"CALLCODE":     CALLCODE,
+	"REVERT":       REVERT,
+	"SELFDESTRUCT": SELFDESTRUCT,
 }
 
 // StringToOp finds the opcode whose name is stored in `str`.
diff --git a/examples/mctx_gen/main.go b/examples/mctx_gen/main.go
new file mode 100644
index 0000000..7e0f715
--- /dev/null
+++ b/examples/mctx_gen/main.go
@@ -0,0 +1,71 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"math/big"
+	"strings"
+
+	"github.com/ava-labs/avalanchego/ids"
+	"github.com/ava-labs/coreth"
+	"github.com/ava-labs/coreth/core/types"
+	"github.com/ava-labs/coreth/core/vm"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/crypto"
+)
+
+func checkError(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+var mcAbiJSON = `[{"inputs":[],"name":"enableMultiCoin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"coinid","type":"uint256"}],"name":"getBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address payable","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"coinid","type":"uint256"},{"internalType":"uint256","name":"amount2","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"}]`
+
+func main() {
+	var fChainID int64
+	var fKey string
+	var fNonce uint64
+	var fGasPrice int64
+	var fGasLimit uint64
+	var fTo string
+	var fAmount int64
+	var fAssetID string
+	flag.Int64Var(&fChainID, "chainid", 43112, "tx.chainId")
+	flag.Uint64Var(&fNonce, "nonce", 0, "tx.nonce")
+	flag.Int64Var(&fChainID, "gasprice", 1000000000, "tx.gasPrice")
+	flag.Uint64Var(&fNonce, "gaslimit", 10000000, "tx.gasLimit")
+	flag.Int64Var(&fAmount, "amount", 100, "tx.amount")
+	flag.StringVar(&fKey, "key", "0x56289e99c94b6912bfc12adc093c9b51124f0dc54ac7a766b2bc5ccf558d8027", "private key (hex with \"0x\")")
+	flag.StringVar(&fTo, "to", "0x1f0e5C64AFdf53175f78846f7125776E76FA8F34", "tx.to (hex with \"0x\")")
+	flag.StringVar(&fAssetID, "assetid", "va6gCYWu3boo3NKQgzdwfzB73dmTYKZn2EZ7nz5pbDBXAsaj4", "assetID")
+
+	_pkey, err := crypto.HexToECDSA(fKey[2:])
+	checkError(err)
+	pkey := coreth.NewKeyFromECDSA(_pkey)
+
+	// info required to generate a transaction
+	chainID := big.NewInt(fChainID)
+	nonce := fNonce
+	gasPrice := big.NewInt(fGasPrice)
+	gasLimit := fGasLimit
+	to := common.HexToAddress(fTo)
+	assetID, err := ids.FromString(fAssetID)
+	checkError(err)
+	mcAbi, err := abi.JSON(strings.NewReader(mcAbiJSON))
+	data, err := mcAbi.Pack("transfer", to, big.NewInt(0), common.Hash(assetID.Key()).Big(), big.NewInt(fAmount))
+	checkError(err)
+	tx := types.NewTransaction(nonce, vm.BuiltinAddr, big.NewInt(0), uint64(gasLimit), gasPrice, data)
+	signedTx, err := types.SignTx(tx, types.NewEIP155Signer(chainID), pkey.PrivateKey)
+	checkError(err)
+	txJSON, err := signedTx.MarshalJSON()
+	checkError(err)
+	fmt.Printf("json: %s\n", string(txJSON))
+	buff := new(bytes.Buffer)
+	err = signedTx.EncodeRLP(buff)
+	checkError(err)
+	fmt.Printf("hex: %s\n", hexutil.Encode(buff.Bytes()))
+}
diff --git a/examples/multicoin/main.go b/examples/multicoin/main.go
index fe7b099..0ff6c0f 100644
--- a/examples/multicoin/main.go
+++ b/examples/multicoin/main.go
@@ -52,8 +52,9 @@ func main() {
 	}
 
 	// configure the genesis block
-	genesisJSON := `{"config":{"chainId":1,"homesteadBlock":0,"daoForkBlock":0,"daoForkSupport":true,"eip150Block":0,"eip150Hash":"0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0","eip155Block":0,"eip158Block":0,"byzantiumBlock":0,"constantinopleBlock":0,"petersburgBlock":0,"petersburgBlock":0,"istanbulBlock":0,"muirGlacierBlock":0},"nonce":"0x0","timestamp":"0x0","extraData":"0x00","gasLimit":"0x5f5e100","difficulty":"0x0","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","coinbase":"0x0000000000000000000000000000000000000000","alloc":{"751a0b96e1042bee789452ecb20253fba40dbe85":{"balance":"0x1000000000000000", "mcbalance": {"0x0000000000000000000000000000000000000000000000000000000000000000": 1000000000000000000}}, "0100000000000000000000000000000000000000": {"code": "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", "balance": "0x0", "mcbalance": {}}},"number":"0x0","gasUsed":"0x0","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000"}`
-	mcAbiJSON := `[{"inputs":[],"name":"enableMultiCoin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"coinid","type":"uint256"}],"name":"getBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address payable","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"coinid","type":"uint256"},{"internalType":"uint256","name":"amount2","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"}]`
+	genesisJSON := `{"config":{"chainId":1,"homesteadBlock":0,"daoForkBlock":0,"daoForkSupport":true,"eip150Block":0,"eip150Hash":"0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0","eip155Block":0,"eip158Block":0,"byzantiumBlock":0,"constantinopleBlock":0,"petersburgBlock":0,"petersburgBlock":0,"istanbulBlock":0,"muirGlacierBlock":0},"nonce":"0x0","timestamp":"0x0","extraData":"0x00","gasLimit":"0x5f5e100","difficulty":"0x0","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","coinbase":"0x0000000000000000000000000000000000000000","alloc":{"751a0b96e1042bee789452ecb20253fba40dbe85":{"balance":"0x1000000000000000", "mcbalance": {"0x0000000000000000000000000000000000000000000000000000000000000000": 1000000000000000000}}, "0100000000000000000000000000000000000000": {"code": "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", "balance": "0x0", "mcbalance": {}}},"number":"0x0","gasUsed":"0x0","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000"}`
+	//mcAbiJSON := `[{"inputs":[],"name":"enableMultiCoin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"coinid","type":"uint256"}],"name":"getBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address payable","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"coinid","type":"uint256"},{"internalType":"uint256","name":"amount2","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"}]`
+	mcAbiJSON := `[{"inputs":[{"internalType":"uint256","name":"coinid","type":"uint256"}],"name":"getBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address payable","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"coinid","type":"uint256"},{"internalType":"uint256","name":"amount2","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"}]`
 	genesisKey := "0xabd71b35d559563fea757f0f5edbde286fb8c043105b15abb7cd57189306d7d1"
 
 	bobKey, _ := coreth.NewKey(rand.Reader)
@@ -95,7 +96,7 @@ func main() {
 
 	mcAbi, err := abi.JSON(strings.NewReader(mcAbiJSON))
 	checkError(err)
-	enableCode, err := mcAbi.Pack("enableMultiCoin")
+	//enableCode, err := mcAbi.Pack("enableMultiCoin")
 	checkError(err)
 
 	abiStr, err := json.Marshal(contract.Info.AbiDefinition)
@@ -133,11 +134,11 @@ func main() {
 				nonce++
 				time.Sleep(20 * time.Millisecond)
 
-				// enable MC for Bob
-				tx = types.NewTransaction(0, vm.BuiltinAddr, big.NewInt(0), uint64(gasLimit), gasPrice, enableCode)
-				signedTx, err = types.SignTx(tx, types.NewEIP155Signer(chainID), bobKey.PrivateKey)
-				checkError(err)
-				chain.AddRemoteTxs([]*types.Transaction{signedTx})
+				//// enable MC for Bob
+				//tx = types.NewTransaction(0, vm.BuiltinAddr, big.NewInt(0), uint64(gasLimit), gasPrice, enableCode)
+				//signedTx, err = types.SignTx(tx, types.NewEIP155Signer(chainID), bobKey.PrivateKey)
+				//checkError(err)
+				//chain.AddRemoteTxs([]*types.Transaction{signedTx})
 
 				time.Sleep(20 * time.Millisecond)
 
diff --git a/examples/multicoin/mc_test.sol b/examples/multicoin/mc_test.sol
index ec07ee6..6ae4d83 100644
--- a/examples/multicoin/mc_test.sol
+++ b/examples/multicoin/mc_test.sol
@@ -4,9 +4,9 @@ contract MCTest {
     address constant MultiCoin = 0x0100000000000000000000000000000000000000;
     uint256 balance;
     constructor() public {
-        // enable multi-coin functionality (it is disabled by default)
-        (bool success,) = MultiCoin.call(abi.encodeWithSignature("enableMultiCoin()"));
-        require(success);
+        //// enable multi-coin functionality (it is disabled by default)
+        //(bool success,) = MultiCoin.call(abi.encodeWithSignature("enableMultiCoin()"));
+        //require(success);
     }
 
     function updateBalance(uint256 coinid) public {
diff --git a/go.mod b/go.mod
index 0acd6d8..adf981a 100644
--- a/go.mod
+++ b/go.mod
@@ -5,15 +5,12 @@ go 1.14
 require (
 	github.com/VictoriaMetrics/fastcache v1.5.7
 	github.com/ava-labs/avalanchego v0.8.3
-	github.com/ava-labs/go-ethereum v1.9.3
-	github.com/cespare/cp v1.1.1
 	github.com/davecgh/go-spew v1.1.1
 	github.com/deckarep/golang-set v1.7.1
 	github.com/edsrzf/mmap-go v1.0.0
 	github.com/ethereum/go-ethereum v1.9.21
 	github.com/fjl/memsize v0.0.0-20190710130421-bcb5799ab5e5
 	github.com/gballet/go-libpcsclite v0.0.0-20191108122812-4678299bea08
-	github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3
 	github.com/golang/snappy v0.0.2-0.20200707131729-196ae77b8a26
 	github.com/gorilla/rpc v1.2.0
 	github.com/gorilla/websocket v1.4.2
@@ -26,7 +23,6 @@ require (
 	github.com/pborman/uuid v1.2.0
 	github.com/prometheus/tsdb v0.10.0
 	github.com/rjeczalik/notify v0.9.2
-	github.com/rs/cors v1.7.0
 	github.com/status-im/keycard-go v0.0.0-20200402102358-957c09536969
 	github.com/steakknife/bloomfilter v0.0.0-20180922174646-6819c0d2a570
 	github.com/tyler-smith/go-bip39 v1.0.2
diff --git a/go.sum b/go.sum
index 46ee8bd..a9a34f5 100644
--- a/go.sum
+++ b/go.sum
@@ -20,6 +20,7 @@ github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jB
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/Shopify/sarama v1.26.1/go.mod h1:NbSGBSSndYaIhRcBtY9V0U7AyH+x71bG668AuWys/yU=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
+github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 h1:fLjPD/aNc3UIOA6tDi6QXUemppXK3P9BI7mr2hd6gx8=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/VictoriaMetrics/fastcache v1.5.7 h1:4y6y0G8PRzszQUYIQHHssv/jgPHAb5qQuuDNdCbyAgw=
 github.com/VictoriaMetrics/fastcache v1.5.7/go.mod h1:ptDBkNMQI4RtmVo8VS/XwRY6RoTu1dAWCbrk+6WsEM8=
@@ -34,19 +35,12 @@ github.com/allegro/bigcache v1.2.1/go.mod h1:Cb/ax3seSYIx7SuZdm2G2xzfwmv3TPSk2uc
 github.com/aristanetworks/fsnotify v1.4.2/go.mod h1:D/rtu7LpjYM8tRJphJ0hUBYpjai8SfX+aSNsWDTq/Ks=
 github.com/aristanetworks/glog v0.0.0-20191112221043-67e8567f59f3/go.mod h1:KASm+qXFKs/xjSoWn30NrWBBvdTTQq+UjkhjEJHfSFA=
 github.com/aristanetworks/goarista v0.0.0-20170210015632-ea17b1a17847/go.mod h1:D/tb0zPVXnP7fmsLZjtdUhSsumbK/ij54UXjjVgMGxQ=
-github.com/aristanetworks/goarista v0.0.0-20200520141224-0f14e646773f h1:uM6lu1fpmCwf54zb6Ckkvphioq8MLlyFb/TlTgPpCKc=
-github.com/aristanetworks/goarista v0.0.0-20200520141224-0f14e646773f/go.mod h1:QZe5Yh80Hp1b6JxQdpfSEEe8X7hTyTEZSosSrFf/oJE=
 github.com/aristanetworks/goarista v0.0.0-20200812190859-4cb0e71f3c0e h1:tkEt0le4Lv5+VmcxZPIVSrP8LVPLhndIm/BOP7iPh/w=
 github.com/aristanetworks/goarista v0.0.0-20200812190859-4cb0e71f3c0e/go.mod h1:QZe5Yh80Hp1b6JxQdpfSEEe8X7hTyTEZSosSrFf/oJE=
 github.com/aristanetworks/splunk-hec-go v0.3.3/go.mod h1:1VHO9r17b0K7WmOlLb9nTk/2YanvOEnLMUgsFrxBROc=
 github.com/ava-labs/avalanche-go v0.8.0-beta/go.mod h1:quYojL1hu0ue2glUT1ng28kADs9R94zGdEvfW0/HRg8=
-github.com/ava-labs/avalanchego v0.8.0-beta h1:VdSvj5DKIdzdmK0tk8l1jQIc1m3N7KRTHXTW+9I1LfI=
-github.com/ava-labs/avalanchego v0.8.0-beta/go.mod h1:quYojL1hu0ue2glUT1ng28kADs9R94zGdEvfW0/HRg8=
-github.com/ava-labs/avalanchego v0.8.0 h1:aAt4roNkkaQx8jgQeKDvTGqSJ2h++rilBAK/xo/uYqo=
 github.com/ava-labs/avalanchego v0.8.3 h1:ioc7RtSAzIv40qxHDikhqZGVxF3y+8cXeIrLpGz9jtc=
 github.com/ava-labs/avalanchego v0.8.3/go.mod h1:6zPzQv7m6vSvdKAwH+lLTga0IMd/0+HLMT5OULrpFcU=
-github.com/ava-labs/avalanchego v0.8.4 h1:8ulQiUsw0r0G0/teZb+fR6fvsZo1YHPJ5fKxQWjT+LM=
-github.com/ava-labs/coreth v0.2.5/go.mod h1:pGolKipwq5vGIY2IBBcBkMYrqniXMsS5SBn+BBi4+Js=
 github.com/ava-labs/coreth v0.2.14-rc.1/go.mod h1:Zhb60GFIB7G5AnUCks0Jo4Rezx/EovL8o+z51aBF1A8=
 github.com/ava-labs/coreth v0.2.15-rc.4/go.mod h1:+sK2XGKCNA48uzeHWe4iBzmiOBYmYvnnzLtOkQeQfkk=
 github.com/ava-labs/gecko v0.6.1-rc.1/go.mod h1:TT6uA1BETZpVMR0xiFtE8I5Mv4DULlS+lAL3xuYKnpA=
@@ -58,6 +52,7 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/btcsuite/btcd v0.0.0-20171128150713-2e60448ffcc6/go.mod h1:Dmm/EzmjnCiweXmzRIAiUWCInVmPgjkzgv5k4tVyXiQ=
+github.com/btcsuite/btcd v0.20.1-beta h1:Ik4hyJqN8Jfyv3S4AGBOmyouMsYE3EdYODkMbQjwPGw=
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
 github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
@@ -88,13 +83,10 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/deckarep/golang-set v0.0.0-20180603214616-504e848d77ea/go.mod h1:93vsz/8Wt4joVM7c2AVqh+YRMiUSc14yDtF28KmMOgQ=
 github.com/deckarep/golang-set v1.7.1 h1:SCQV0S6gTtp6itiFrTqI+pfmJ4LN85S1YzhDf9rTHJQ=
 github.com/deckarep/golang-set v1.7.1/go.mod h1:93vsz/8Wt4joVM7c2AVqh+YRMiUSc14yDtF28KmMOgQ=
+github.com/decred/dcrd/chaincfg/chainhash v1.0.2 h1:rt5Vlq/jM3ZawwiacWjPa+smINyLRN07EO0cNBV6DGU=
 github.com/decred/dcrd/chaincfg/chainhash v1.0.2/go.mod h1:BpbrGgrPTr3YJYRN3Bm+D9NuaFd+zGyNeIKgrhCXK60=
+github.com/decred/dcrd/crypto/blake256 v1.0.0 h1:/8DMNYp9SGi5f0w7uCm6d6M4OU2rGFK09Y2A4Xv7EE0=
 github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
-github.com/decred/dcrd/dcrec/secp256k1 v1.0.3 h1:u4XpHqlscRolxPxt2YHrFBDVZYY1AK+KMV02H1r+HmU=
-github.com/decred/dcrd/dcrec/secp256k1 v1.0.3/go.mod h1:eCL8H4MYYjRvsw2TuANvEOcVMFbmi9rt/6hJUWU5wlU=
-github.com/decred/dcrd/dcrec/secp256k1/v2 v2.0.0/go.mod h1:3s92l0paYkZoIHuj4X93Teg/HB7eGM9x/zokGw+u4mY=
-github.com/decred/dcrd/dcrec/secp256k1/v3 v3.0.0-20200526030155-0c6c7ca85d3b h1:TSqdwcjNCJ2SXwoVMkgn9oZeuR1Lh2akLzZh58hPjzQ=
-github.com/decred/dcrd/dcrec/secp256k1/v3 v3.0.0-20200526030155-0c6c7ca85d3b/go.mod h1:J70FGZSbzsjecRTiTzER+3f1KZLNaXkuv+yeFTKoxM8=
 github.com/decred/dcrd/dcrec/secp256k1/v3 v3.0.0-20200627015759-01fd2de07837 h1:g2cyFTu5FKWhCo7L4hVJ797Q506B4EywA7L9I6OebgA=
 github.com/decred/dcrd/dcrec/secp256k1/v3 v3.0.0-20200627015759-01fd2de07837/go.mod h1:J70FGZSbzsjecRTiTzER+3f1KZLNaXkuv+yeFTKoxM8=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
@@ -110,8 +102,6 @@ github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFP
 github.com/edsrzf/mmap-go v0.0.0-20160512033002-935e0e8a636c/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
 github.com/edsrzf/mmap-go v1.0.0 h1:CEBF7HpRnUCSJgGUb5h1Gm7e3VkmVDrR8lvWVLtrOFw=
 github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
-github.com/elastic/gosigar v0.10.5 h1:GzPQ+78RaAb4J63unidA/JavQRKrB6s8IOzN6Ib59jo=
-github.com/elastic/gosigar v0.10.5/go.mod h1:cdorVVzy1fhmEqmtgqkoE3bYtCfSCkVyjTyCIo22xvs=
 github.com/elastic/gosigar v0.11.0 h1:L8Stala75cAVQo+HLJebmtaOr1032y357R0CjbKSrZc=
 github.com/elastic/gosigar v0.11.0/go.mod h1:cdorVVzy1fhmEqmtgqkoE3bYtCfSCkVyjTyCIo22xvs=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
@@ -126,9 +116,11 @@ github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5Kwzbycv
 github.com/fjl/memsize v0.0.0-20180418122429-ca190fb6ffbc/go.mod h1:VvhXpOYNQvB+uIk2RvXzuaQtkQJzzIx6lSBe1xv7hi0=
 github.com/fjl/memsize v0.0.0-20190710130421-bcb5799ab5e5 h1:FtmdgXiUlNeRsoNMFlKLDt+S+6hbjVMEW6RGQ7aUf7c=
 github.com/fjl/memsize v0.0.0-20190710130421-bcb5799ab5e5/go.mod h1:VvhXpOYNQvB+uIk2RvXzuaQtkQJzzIx6lSBe1xv7hi0=
+github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw=
 github.com/fortytw2/leaktest v1.3.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g=
 github.com/frankban/quicktest v1.7.2/go.mod h1:jaStnuzAqU1AJdCO0l53JDCJrVDKcS03DbaAcR7Ks/o=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/garyburd/redigo v1.6.0/go.mod h1:NR3MbYisc3/PwhQ00EMzDiPmrwpPxAn5GI05/YaO1SY=
 github.com/gballet/go-libpcsclite v0.0.0-20190607065134-2772fd86a8ff/go.mod h1:x7DCsMOv1taUwEWCzT4cmDeAkigA5/QCwUodaVOe8Ww=
@@ -136,9 +128,12 @@ github.com/gballet/go-libpcsclite v0.0.0-20191108122812-4678299bea08 h1:f6D9Hr8x
 github.com/gballet/go-libpcsclite v0.0.0-20191108122812-4678299bea08/go.mod h1:x7DCsMOv1taUwEWCzT4cmDeAkigA5/QCwUodaVOe8Ww=
 github.com/gdamore/optopia v0.2.0/go.mod h1:YKYEwo5C1Pa617H7NlPcmQXl+vG6YnSSNB44n8dNL0Q=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-kit/kit v0.9.0 h1:wDJmvq38kDhkVxi50ni9ykkdUr1PKgqKOoi01fa0Mdk=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-logfmt/logfmt v0.4.0 h1:MP4Eh7ZCb31lleYCFuwm0oe4/YGak+5l1vA2NOE80nA=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
+github.com/go-ole/go-ole v1.2.1 h1:2lOsA72HgjxAuMlKpFiCbHTvu44PIVkZ5hqm3RSdI/E=
 github.com/go-ole/go-ole v1.2.1/go.mod h1:7FAglXiTm7HKlQRDeOQ6ZNUHidzCWXuZWq/1dTyBNF8=
 github.com/go-sourcemap/sourcemap v2.1.2+incompatible/go.mod h1:F8jJfvm2KbVjc5NqelyYJmf/v5J0dwNLS2mL4sNA1Jg=
 github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
@@ -147,6 +142,7 @@ github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7a
 github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3 h1:zN2lZNZRflqFyxVaTIU61KNKQ9C0055u9CAfpmqUvo4=
 github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3/go.mod h1:nPpo7qLxd6XL3hWJG/O60sR8ZKfMCiIoNap5GvD12KU=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -169,6 +165,7 @@ github.com/golang/snappy v0.0.2-0.20200707131729-196ae77b8a26/go.mod h1:/XxbfmMg
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.0.0 h1:b4Gk+7WdP/d3HZH8EJsZpvV7EtDOgaZLtnaNGIu1adA=
@@ -228,6 +225,7 @@ github.com/klauspost/compress v1.10.1/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYs
 github.com/klauspost/cpuid v1.2.3/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
 github.com/klauspost/reedsolomon v1.9.3/go.mod h1:CwCi+NUr9pqSVktrkN+Ondf06rkhYZ/pcNv7fu+8Un4=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515 h1:T+h1c/A9Gawja4Y9mFVWj2vyii2bbUNDw3kt9VxK2EY=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
@@ -240,7 +238,6 @@ github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/mattn/go-colorable v0.1.0/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
-github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-colorable v0.1.7 h1:bQGKb3vps/j0E9GfJQ03JyhRuxsvdAanXlT9BTw3mdw=
 github.com/mattn/go-colorable v0.1.7/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-ieproxy v0.0.0-20190610004146-91bb50d98149/go.mod h1:31jz6HNzdxOmlERGGEc4v/dMssOfmp2p5bT/okiKFFc=
@@ -272,6 +269,7 @@ github.com/naoina/go-stringutil v0.1.0/go.mod h1:XJ2SJL9jCtBh+P9q5btrd/Ylo8XwT/h
 github.com/naoina/toml v0.1.2-0.20170918210437-9fafd6967416/go.mod h1:NBIhNtsFMo3G2szEBne+bO4gS192HuIYRqfvOWb4i1E=
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 github.com/nbutton23/zxcvbn-go v0.0.0-20180912185939-ae427f1e4c1d/go.mod h1:o96djdrsSGy3AWPyBgZMAGfxZNfgntdJG+11KU4QvbU=
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@@ -285,11 +283,13 @@ github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
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