From 061234ceacea589b545b891ee8879d77387a6abe Mon Sep 17 00:00:00 2001
From: Dave Collins <davec@conformal.com>
Date: Wed, 11 Oct 2023 15:45:10 -0500
Subject: [PATCH] multi: Remove no longer relevant blake256 pad code.

This removes the blake256 padding code since it no longer applies.
---
 pool/client.go        |  5 -----
 pool/client_test.go   |  2 --
 pool/endpoint.go      |  4 ----
 pool/endpoint_test.go |  2 --
 pool/hub.go           | 14 --------------
 5 files changed, 27 deletions(-)

diff --git a/pool/client.go b/pool/client.go
index 5e9fb049..c54443a5 100644
--- a/pool/client.go
+++ b/pool/client.go
@@ -76,9 +76,6 @@ type ClientConfig struct {
 	db Database
 	// SoloPool represents the solo pool mining mode.
 	SoloPool bool
-	// Blake256Pad represents the extra padding needed for work
-	// submissions over the getwork RPC.
-	Blake256Pad []byte
 	// NonceIterations returns the possible header nonce iterations.
 	NonceIterations float64
 	// FetchMinerDifficulty returns the difficulty information for the
@@ -588,8 +585,6 @@ func (c *Client) handleSubmitWorkRequest(ctx context.Context, req *Request, allo
 	}
 	submissionB := make([]byte, getworkDataLen)
 	copy(submissionB[:wire.MaxBlockHeaderPayload], headerB)
-	copy(submissionB[wire.MaxBlockHeaderPayload:],
-		c.cfg.Blake256Pad)
 	submission := hex.EncodeToString(submissionB)
 	accepted, err := c.cfg.SubmitWork(ctx, submission)
 	if err != nil {
diff --git a/pool/client_test.go b/pool/client_test.go
index aa760d9b..b9d85f92 100644
--- a/pool/client_test.go
+++ b/pool/client_test.go
@@ -31,7 +31,6 @@ var (
 
 	powLimit    = chaincfg.SimNetParams().PowLimit
 	iterations  = math.Pow(2, float64(256-powLimit.BitLen()))
-	blake256Pad = generateBlake256Pad()
 	maxGenTime  = time.Millisecond * 500
 	cTimeout    = time.Millisecond * 2000
 	hashCalcMax = time.Millisecond * 1500
@@ -39,7 +38,6 @@ var (
 		new(big.Rat).SetInt(powLimit), maxGenTime)
 	config = &ClientConfig{
 		ActiveNet:       chaincfg.SimNetParams(),
-		Blake256Pad:     blake256Pad,
 		NonceIterations: iterations,
 		MaxGenTime:      maxGenTime,
 		FetchMinerDifficulty: func(miner string) (*DifficultyInfo, error) {
diff --git a/pool/endpoint.go b/pool/endpoint.go
index 17090c40..9a3d9cb4 100644
--- a/pool/endpoint.go
+++ b/pool/endpoint.go
@@ -26,9 +26,6 @@ type EndpointConfig struct {
 	db Database
 	// SoloPool represents the solo pool mining mode.
 	SoloPool bool
-	// Blake256Pad represents the extra padding needed for work
-	// submissions over the getwork RPC.
-	Blake256Pad []byte
 	// NonceIterations returns the possible header nonce iterations.
 	NonceIterations float64
 	// MaxConnectionsPerHost represents the maximum number of connections
@@ -173,7 +170,6 @@ func (e *Endpoint) connect(ctx context.Context) {
 				ActiveNet:            e.cfg.ActiveNet,
 				db:                   e.cfg.db,
 				SoloPool:             e.cfg.SoloPool,
-				Blake256Pad:          e.cfg.Blake256Pad,
 				NonceIterations:      e.cfg.NonceIterations,
 				FetchMinerDifficulty: e.cfg.FetchMinerDifficulty,
 				SubmitWork:           e.cfg.SubmitWork,
diff --git a/pool/endpoint_test.go b/pool/endpoint_test.go
index 76f8783b..0b9dd409 100644
--- a/pool/endpoint_test.go
+++ b/pool/endpoint_test.go
@@ -32,7 +32,6 @@ func testEndpoint(t *testing.T) {
 	powLimit := chaincfg.SimNetParams().PowLimit
 	iterations := math.Pow(2, float64(256-powLimit.BitLen()))
 	maxGenTime := time.Second * 20
-	blake256Pad := generateBlake256Pad()
 	poolDiffs := NewDifficultySet(chaincfg.SimNetParams(),
 		new(big.Rat).SetInt(powLimit), maxGenTime)
 	connections := make(map[string]uint32)
@@ -42,7 +41,6 @@ func testEndpoint(t *testing.T) {
 		ActiveNet:             chaincfg.SimNetParams(),
 		db:                    db,
 		SoloPool:              true,
-		Blake256Pad:           blake256Pad,
 		NonceIterations:       iterations,
 		MaxConnectionsPerHost: maxConnsPerHost,
 		FetchMinerDifficulty: func(miner string) (*DifficultyInfo, error) {
diff --git a/pool/hub.go b/pool/hub.go
index ff40d9d5..f536e0a4 100644
--- a/pool/hub.go
+++ b/pool/hub.go
@@ -198,7 +198,6 @@ type Hub struct {
 	connections    map[string]uint32
 	connectionsMtx sync.RWMutex
 	endpoint       *Endpoint
-	blake256Pad    []byte
 	cacheCh        chan CacheUpdateEvent
 }
 
@@ -216,17 +215,6 @@ func (h *Hub) FetchCacheChannel() chan CacheUpdateEvent {
 	return h.cacheCh
 }
 
-// generateBlake256Pad creates the extra padding needed for work
-// submissions over the getwork RPC.
-func generateBlake256Pad() []byte {
-	blake256Pad := make([]byte, getworkDataLen-wire.MaxBlockHeaderPayload)
-	blake256Pad[0] = 0x80
-	blake256Pad[len(blake256Pad)-9] |= 0x01
-	binary.BigEndian.PutUint64(blake256Pad[len(blake256Pad)-8:],
-		wire.MaxBlockHeaderPayload*8)
-	return blake256Pad
-}
-
 // NewHub initializes the mining pool hub.
 func NewHub(hcfg *HubConfig) (*Hub, error) {
 	h := &Hub{
@@ -235,7 +223,6 @@ func NewHub(hcfg *HubConfig) (*Hub, error) {
 		connections: make(map[string]uint32),
 		cacheCh:     make(chan CacheUpdateEvent, bufferSize),
 	}
-	h.blake256Pad = generateBlake256Pad()
 	powLimit := new(big.Rat).SetInt(h.cfg.ActiveNet.PowLimit)
 	maxGenTime := h.cfg.MaxGenTime
 	if h.cfg.SoloPool {
@@ -317,7 +304,6 @@ func NewHub(hcfg *HubConfig) (*Hub, error) {
 		ActiveNet:             h.cfg.ActiveNet,
 		db:                    h.cfg.DB,
 		SoloPool:              h.cfg.SoloPool,
-		Blake256Pad:           h.blake256Pad,
 		NonceIterations:       h.cfg.NonceIterations,
 		MaxConnectionsPerHost: h.cfg.MaxConnectionsPerHost,
 		FetchMinerDifficulty:  h.poolDiffs.fetchMinerDifficulty,