core,internal,light,miner,node,metadium: Added TRS(Transaction Restri…

…ction Service) implementation.

 - Added function read trsParameters(trsList,subscribe) from contract.
 - Added function check trs subscribe.
 - Added function to restriction transactions from addresses included in trsList.
 - Added function to periodically discard transactions included in trsList from the pending txpool.
 - Added admin_trsInfo RPC API.

Makefile

@@ -154,6 +154,11 @@ BEGIN { print "package metadium\n"; }					     \
   sub("^var[^(]*\\(","",$$0); sub("\\);$$","",$$0);			     \
   n = "Gov";								     \
   print "var " n "Abi = `{ \"contractName\": \"" n "\", \"abi\": " $$0 "}`"; \
+}									     \
+/^var TRSListImp_contract/ {							     \
+  sub("^var[^(]*\\(","",$$0); sub("\\);$$","",$$0);			     \
+  n = "TRSList";								     \
+  print "var " n "Abi = `{ \"contractName\": \"" n "\", \"abi\": " $$0 "}`"; \
 }'
 
 metadium/governance_abi.go: metadium/contracts/MetadiumGovernance.js

core/error.go

@@ -108,4 +108,8 @@ var (
 	// ErrSenderInsufficientFunds is returned if the value cost of executing a transaction
 	// is higher than the balance of the sender's account.
 	ErrSenderInsufficientFunds = errors.New("fee delegation: insufficient sender's funds for value")
+
+	// Add TRS
+	// ErrIncludedTRSList is returned if the address included in the TRSList.
+	ErrIncludedTRSList = errors.New("included in the TRSList")
 )

core/tx_pool.go

@@ -34,6 +34,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/log"
+	metaminer "github.com/ethereum/go-ethereum/metadium/miner"
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/params"
 )
@@ -95,6 +96,8 @@ var (
 var (
 	evictionInterval    = time.Minute     // Time interval to check for evictable transactions
 	statsReportInterval = 8 * time.Second // Time interval to report transaction pool stats
+	// Add TRS
+	trsTickerInterval = 3 * time.Hour // Time interval to check for TRS transactions
 )
 
 var (
@@ -356,12 +359,16 @@ func (pool *TxPool) loop() {
 		report  = time.NewTicker(statsReportInterval)
 		evict   = time.NewTicker(evictionInterval)
 		journal = time.NewTicker(pool.config.Rejournal)
+		// Add TRS
+		trsTicker = time.NewTicker(trsTickerInterval)
 		// Track the previous head headers for transaction reorgs
 		head = pool.chain.CurrentBlock()
 	)
 	defer report.Stop()
 	defer evict.Stop()
 	defer journal.Stop()
+	// Add TRS
+	defer trsTicker.Stop()
 
 	// Notify tests that the init phase is done
 	close(pool.initDoneCh)
@@ -433,6 +440,26 @@ func (pool *TxPool) loop() {
 				}
 				pool.mu.Unlock()
 			}
+		// Add TRS
+		case <-trsTicker.C:
+			// Removes the transaction included in trsList regardless of TRS subscription.
+			if !metaminer.IsPoW() {
+				trsListMap, _, _ := metaminer.GetTRSListMap(pool.chain.CurrentBlock().Number())
+				if len(trsListMap) > 0 {
+					pool.mu.Lock()
+					for addr := range pool.pending {
+						list := pool.pending[addr].Flatten()
+						for _, tx := range list {
+							if trsListMap[addr] || (tx.To() != nil && trsListMap[*tx.To()]) {
+								log.Debug("Discard pending transaction included in trsList", "hash", tx.Hash(), "addr", addr)
+								pool.removeTx(tx.Hash(), true)
+								pendingDiscardMeter.Mark(int64(1))
+							}
+						}
+					}
+					pool.mu.Unlock()
+				}
+			}
 		}
 	}
 }
@@ -701,6 +728,17 @@ func (pool *TxPool) validateTx(tx *types.Transaction, local bool) error {
 	if pool.currentState.GetNonce(from) > tx.Nonce() {
 		return ErrNonceTooLow
 	}
+	// Add TRS
+	// Only nodes that subscribe to TRS removes transactions included in trsList.
+	if !metaminer.IsPoW() {
+		trsListMap, trsSubscribe, _ := metaminer.GetTRSListMap(pool.chain.CurrentBlock().Number())
+		if len(trsListMap) > 0 && trsSubscribe {
+			if trsListMap[from] || (tx.To() != nil && trsListMap[*tx.To()]) {
+				return ErrIncludedTRSList
+			}
+		}
+	}
+
 	// Transactor should have enough funds to cover the costs
 	// cost == V + GP * GL
 
@@ -1409,6 +1447,13 @@ func (pool *TxPool) promoteExecutables(accounts []common.Address) []*types.Trans
 	// Track the promoted transactions to broadcast them at once
 	var promoted []*types.Transaction
 
+	// Add TRS
+	var trsListMap map[common.Address]bool
+	var trsSubscribe bool
+	if !metaminer.IsPoW() {
+		trsListMap, trsSubscribe, _ = metaminer.GetTRSListMap(pool.chain.CurrentBlock().Number())
+	}
+
 	// Iterate over all accounts and promote any executable transactions
 	for _, addr := range accounts {
 		list := pool.queue[addr]
@@ -1425,6 +1470,20 @@ func (pool *TxPool) promoteExecutables(accounts []common.Address) []*types.Trans
 		// Drop all transactions that are too costly (low balance or out of gas)
 		drops, _ := list.Filter(pool.currentState.GetBalance(addr), pool.currentMaxGas)
 
+		// Add TRS
+		// Only nodes that subscribe to TRS removes transactions included in trsList.
+		if !metaminer.IsPoW() {
+			if len(trsListMap) > 0 && trsSubscribe {
+				for _, tx := range list.Flatten() {
+					if trsListMap[addr] || (tx.To() != nil && trsListMap[*tx.To()]) {
+						log.Trace("Removed queued transaction included in trsList", "hash", tx.Hash(), "addr", addr)
+						list.Remove(tx)
+						drops = append(drops, tx)
+					}
+				}
+			}
+		}
+
 		// fee delegation
 		if pool.feedelegation {
 			for _, tx := range list.Flatten() {
@@ -1623,6 +1682,13 @@ func (pool *TxPool) truncateQueue() {
 // is always explicitly triggered by SetBaseFee and it would be unnecessary and wasteful
 // to trigger a re-heap is this function
 func (pool *TxPool) demoteUnexecutables() {
+	// Add TRS
+	var trsListMap map[common.Address]bool
+	var trsSubscribe bool
+	if !metaminer.IsPoW() {
+		trsListMap, trsSubscribe, _ = metaminer.GetTRSListMap(pool.chain.CurrentBlock().Number())
+	}
+
 	// Iterate over all accounts and demote any non-executable transactions
 	for addr, list := range pool.pending {
 		nonce := pool.currentState.GetNonce(addr)
@@ -1637,6 +1703,20 @@ func (pool *TxPool) demoteUnexecutables() {
 		// Drop all transactions that are too costly (low balance or out of gas), and queue any invalids back for later
 		drops, invalids := list.Filter(pool.currentState.GetBalance(addr), pool.currentMaxGas)
 
+		// Add TRS
+		// Only nodes that subscribe to TRS removes transactions included in trsList.
+		if !metaminer.IsPoW() {
+			if len(trsListMap) > 0 && trsSubscribe {
+				for _, tx := range list.Flatten() {
+					if trsListMap[addr] || (tx.To() != nil && trsListMap[*tx.To()]) {
+						log.Trace("Removed pending transaction included in trsList", "hash", tx.Hash(), "addr", addr)
+						list.Remove(tx)
+						drops = append(drops, tx)
+					}
+				}
+			}
+		}
+
 		// fee delegation
 		if pool.feedelegation {
 			for _, tx := range list.Flatten() {

internal/web3ext/web3ext.go

@@ -249,6 +249,12 @@ web3._extend({
 			call: 'admin_etcdDeleteWork',
 			params: 0
 		}),
+		new web3._extend.Method({
+			name: 'trsInfo',
+			call: 'admin_trsInfo',
+			params: 1,
+			inputFormatter: [web3._extend.formatters.inputBlockNumberFormatter]
+		}),
 	],
 	properties: [
 		new web3._extend.Property({

light/txpool.go

@@ -31,6 +31,7 @@ import (
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/log"
+	metaminer "github.com/ethereum/go-ethereum/metadium/miner"
 	"github.com/ethereum/go-ethereum/params"
 )
 
@@ -382,6 +383,17 @@ func (pool *TxPool) validateTx(ctx context.Context, tx *types.Transaction) error
 		return core.ErrNegativeValue
 	}
 
+	// Add TRS
+	// Only nodes that subscribe to TRS reject transactions included in trsList.
+	if !metaminer.IsPoW() {
+		trsListMap, trsSubscribe, _ := metaminer.GetTRSListMap(pool.chain.CurrentHeader().Number)
+		if len(trsListMap) > 0 && trsSubscribe {
+			if trsListMap[from] || (tx.To() != nil && trsListMap[*tx.To()]) {
+				return core.ErrIncludedTRSList
+			}
+		}
+	}
+
 	// Transactor should have enough funds to cover the costs
 	// cost == V + GP * GL