From 499f682b48f914ed4af0e32ba446dd0cf56e96b4 Mon Sep 17 00:00:00 2001
From: Determinant <ted.sybil@gmail.com>
Date: Wed, 14 Aug 2019 15:19:28 -0400
Subject: allow manual block generation

---
 miner/miner.go  | 23 +++++++++++++++++++----
 miner/worker.go | 22 +++++++++++++++++++---
 2 files changed, 38 insertions(+), 7 deletions(-)

(limited to 'miner')

diff --git a/miner/miner.go b/miner/miner.go
index 969dceb..4e36fed 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -20,6 +20,7 @@ package miner
 import (
     "fmt"
     "time"
+    "math/big"
 
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/types"
@@ -27,8 +28,8 @@ import (
 	"github.com/ethereum/go-ethereum/consensus"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/state"
-	eminer "github.com/ethereum/go-ethereum/miner"
 )
 
 // Backend wraps all methods required for mining.
@@ -38,15 +39,25 @@ type Backend interface {
 }
 
 // Config is the configuration parameters of mining.
-type Config = eminer.Config
+type Config struct {
+	Etherbase common.Address `toml:",omitempty"` // Public address for block mining rewards (default = first account)
+	Notify    []string       `toml:",omitempty"` // HTTP URL list to be notified of new work packages(only useful in ethash).
+	ExtraData hexutil.Bytes  `toml:",omitempty"` // Block extra data set by the miner
+	GasFloor  uint64         // Target gas floor for mined blocks.
+	GasCeil   uint64         // Target gas ceiling for mined blocks.
+	GasPrice  *big.Int       // Minimum gas price for mining a transaction
+	Recommit  time.Duration  // The time interval for miner to re-create mining work.
+	Noverify  bool           // Disable remote mining solution verification(only useful in ethash).
+    ManualMining bool
+}
 
 type Miner struct {
     w *worker
 }
 
-func New(eth Backend, config *Config, chainConfig *params.ChainConfig, mux *event.TypeMux, engine consensus.Engine, isLocalBlock func(block *types.Block) bool) *Miner {
+func New(eth Backend, config *Config, chainConfig *params.ChainConfig, mux *event.TypeMux, engine consensus.Engine, isLocalBlock func(block *types.Block) bool, manualMining bool) *Miner {
     return &Miner {
-        w: newWorker(config, chainConfig, engine, eth, mux, isLocalBlock),
+        w: newWorker(config, chainConfig, engine, eth, mux, isLocalBlock, manualMining),
     }
 }
 
@@ -91,3 +102,7 @@ func (self *Miner) PendingBlock() *types.Block {
 func (self *Miner) SetEtherbase(addr common.Address) {
     self.w.setEtherbase(addr)
 }
+
+func (self *Miner) GenBlock() {
+    self.w.genBlock()
+}
diff --git a/miner/worker.go b/miner/worker.go
index b5448d3..5124758 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -180,9 +180,10 @@ type worker struct {
 	skipSealHook func(*task) bool                   // Method to decide whether skipping the sealing.
 	fullTaskHook func()                             // Method to call before pushing the full sealing task.
 	resubmitHook func(time.Duration, time.Duration) // Method to call upon updating resubmitting interval.
+    manualMining bool
 }
 
-func newWorker(config *Config, chainConfig *params.ChainConfig, engine consensus.Engine, eth Backend, mux *event.TypeMux, isLocalBlock func(*types.Block) bool) *worker {
+func newWorker(config *Config, chainConfig *params.ChainConfig, engine consensus.Engine, eth Backend, mux *event.TypeMux, isLocalBlock func(*types.Block) bool, manualMining bool) *worker {
 	worker := &worker{
 		config:             config,
 		chainConfig:        chainConfig,
@@ -205,6 +206,7 @@ func newWorker(config *Config, chainConfig *params.ChainConfig, engine consensus
 		startCh:            make(chan struct{}, 1),
 		resubmitIntervalCh: make(chan time.Duration),
 		resubmitAdjustCh:   make(chan *intervalAdjust, resubmitAdjustChanSize),
+        manualMining: manualMining,
 	}
 	// Subscribe NewTxsEvent for tx pool
 	worker.txsSub = eth.TxPool().SubscribeNewTxsEvent(worker.txsCh)
@@ -290,6 +292,16 @@ func (w *worker) close() {
 	close(w.exitCh)
 }
 
+func (w *worker) genBlock() {
+    interrupt := new(int32)
+    *interrupt = commitInterruptNewHead
+    w.newWorkCh <- &newWorkReq{
+        interrupt: interrupt,
+        noempty: false,
+        timestamp: time.Now().Unix(),
+    }
+}
+
 // newWorkLoop is a standalone goroutine to submit new mining work upon received events.
 func (w *worker) newWorkLoop(recommit time.Duration) {
 	var (
@@ -348,12 +360,16 @@ func (w *worker) newWorkLoop(recommit time.Duration) {
 		case <-w.startCh:
 			clearPending(w.chain.CurrentBlock().NumberU64())
 			timestamp = time.Now().Unix()
-			commit(false, commitInterruptNewHead)
+            if !w.manualMining {
+			    commit(false, commitInterruptNewHead)
+            }
 
 		case head := <-w.chainHeadCh:
 			clearPending(head.Block.NumberU64())
 			timestamp = time.Now().Unix()
-			commit(false, commitInterruptNewHead)
+            if !w.manualMining {
+			    commit(false, commitInterruptNewHead)
+            }
 
 		case <-timer.C:
 			// If mining is running resubmit a new work cycle periodically to pull in
-- 
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