move constants definitions to own module

lib/constants.js

@@ -0,0 +1,57 @@
+'use strict';
+
+var Constants = {};
+
+Constants.SCRIPT_TYPES = {
+  P2SH: 'P2SH',
+  P2PKH: 'P2PKH',
+};
+Constants.DERIVATION_STRATEGIES = {
+  BIP44: 'BIP44',
+  BIP45: 'BIP45',
+};
+
+Constants.PATHS = {
+  REQUEST_KEY: "m/1'/0",
+  TXPROPOSAL_KEY: "m/1'/1",
+  REQUEST_KEY_AUTH: "m/2", // relative to BASE
+};
+
+Constants.DEFAULT_FEE_PER_KB = 10000;
+Constants.MIN_FEE_PER_KB = 0;
+Constants.MAX_FEE_PER_KB = 1000000;
+Constants.MAX_TX_FEE = 1 * 1e8;
+
+Constants.MAX_KEYS = 100;
+
+// Time after which a Tx proposal can be erased by any copayer. in seconds
+Constants.DELETE_LOCKTIME = 24 * 3600;
+
+// Allowed consecutive txp rejections before backoff is applied.
+Constants.BACKOFF_OFFSET = 3;
+
+// Time a copayer need to wait to create a new TX after her tx previous proposal we rejected. (incremental). in Minutes.
+Constants.BACKOFF_TIME = 2;
+
+Constants.MAX_MAIN_ADDRESS_GAP = 20;
+
+// Fund scanning parameters
+Constants.SCAN_CONFIG = {
+  maxGap: Constants.MAX_MAIN_ADDRESS_GAP,
+};
+
+Constants.FEE_LEVELS = [{
+  name: 'priority',
+  nbBlocks: 1,
+  defaultValue: 50000
+}, {
+  name: 'normal',
+  nbBlocks: 2,
+  defaultValue: 20000
+}, {
+  name: 'economy',
+  nbBlocks: 6,
+  defaultValue: 10000
+}];
+
+module.exports = Constants;