network: refactor. optimize startup time.

lib/protocol/networks.js

@@ -181,6 +181,14 @@ main.pow = {
     'hex'
   ),
 
+  /**
+   * Compact pow limit.
+   * @const {Number}
+   * @default
+   */
+
+  bits: 486604799,
+
   /**
    * Default retarget interval.
    * @const {Number}
@@ -197,6 +205,14 @@ main.pow = {
 
   targetSpacing: 10 * 60,
 
+  /**
+   * Retarget interval in blocks.
+   * @const {Number}
+   * @default
+   */
+
+  retargetInterval: 2016,
+
   /**
    * Allow constant retargetting on testnet.
    * @const {Boolean}
@@ -214,22 +230,6 @@ main.pow = {
   noRetargeting: false
 };
 
-/**
- * Retarget interval in blocks.
- * @const {Number}
- * @default
- */
-
-main.pow.retargetInterval = main.pow.targetTimespan / main.pow.targetSpacing | 0;
-
-/**
- * Compact pow limit.
- * @const {Number}
- * @default
- */
-
-main.pow.bits = utils.toCompact(main.pow.limit);
-
 /**
  * Block constants.
  * @enum {Number}
@@ -529,16 +529,14 @@ testnet.pow = {
     '00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
     'hex'
   ),
+  bits: 486604799,
   targetTimespan: 14 * 24 * 60 * 60, // two weeks
   targetSpacing: 10 * 60,
+  retargetInterval: 2016,
   allowMinDifficultyBlocks: true,
   noRetargeting: false
 };
 
-testnet.pow.retargetInterval = testnet.pow.targetTimespan / testnet.pow.targetSpacing | 0;
-
-testnet.pow.bits = utils.toCompact(testnet.pow.limit);
-
 testnet.block = {
   majorityEnforceUpgrade: 51,
   majorityRejectOutdated: 75,
@@ -680,16 +678,14 @@ regtest.pow = {
     '7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
     'hex'
   ),
+  bits: 545259519,
   targetTimespan: 14 * 24 * 60 * 60, // two weeks
   targetSpacing: 10 * 60,
+  retargetInterval: 2016,
   allowMinDifficultyBlocks: true,
   noRetargeting: true
 };
 
-regtest.pow.retargetInterval = regtest.pow.targetTimespan / regtest.pow.targetSpacing | 0;
-
-regtest.pow.bits = utils.toCompact(regtest.pow.limit);
-
 regtest.block = {
   majorityEnforceUpgrade: 750,
   majorityRejectOutdated: 950,
@@ -828,16 +824,14 @@ segnet3.pow = {
     '00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
     'hex'
   ),
+  bits: 486604799,
   targetTimespan: 14 * 24 * 60 * 60, // two weeks
   targetSpacing: 10 * 60,
+  retargetInterval: 2016,
   allowMinDifficultyBlocks: true,
   noRetargeting: false
 };
 
-segnet3.pow.retargetInterval = segnet3.pow.targetTimespan / segnet3.pow.targetSpacing | 0;
-
-segnet3.pow.bits = utils.toCompact(segnet3.pow.limit);
-
 segnet3.block = {
   majorityEnforceUpgrade: 7,
   majorityRejectOutdated: 9,
@@ -952,16 +946,14 @@ segnet4.pow = {
     '000001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
     'hex'
   ),
+  bits: 503447551,
   targetTimespan: 14 * 24 * 60 * 60, // two weeks
   targetSpacing: 10 * 60,
+  retargetInterval: 2016,
   allowMinDifficultyBlocks: true,
   noRetargeting: false
 };
 
-segnet4.pow.retargetInterval = segnet4.pow.targetTimespan / segnet4.pow.targetSpacing | 0;
-
-segnet4.pow.bits = utils.toCompact(segnet4.pow.limit);
-
 segnet4.block = {
   majorityEnforceUpgrade: 7,
   majorityRejectOutdated: 9,
@@ -1098,16 +1090,14 @@ simnet.pow = {
     '7fffff0000000000000000000000000000000000000000000000000000000000',
     'hex'
   ),
+  bits: 545259519,
   targetTimespan: 14 * 24 * 60 * 60, // two weeks
   targetSpacing: 10 * 60,
+  retargetInterval: 2016,
   allowMinDifficultyBlocks: true,
   noRetargeting: false
 };
 
-simnet.pow.retargetInterval = simnet.pow.targetTimespan / simnet.pow.targetSpacing | 0;
-
-simnet.pow.bits = utils.toCompact(simnet.pow.limit);
-
 simnet.block = {
   majorityEnforceUpgrade: 51,
   majorityRejectOutdated: 75,