Move fee estimation into networks.js

test/network.js

@@ -0,0 +1,23 @@
+var assert = require('assert')
+var networks = require('../src/networks')
+var Transaction = require('../src/transaction')
+
+var fixtureTxes = require('./fixtures/mainnet_tx')
+var fixtureTx1Hex = fixtureTxes.prevTx
+var fixtureTxBigHex = fixtureTxes.bigTx
+
+describe('bitcoin', function() {
+  describe('estimateFee', function() {
+    var estimateFee = networks.bitcoin.estimateFee
+
+    it('works for fixture tx 1', function() {
+      var tx = Transaction.fromHex(fixtureTx1Hex)
+      assert.equal(estimateFee(tx.toBuffer().length), 10000)
+    })
+
+    it('works for fixture big tx', function() {
+      var tx = Transaction.fromHex(fixtureTxBigHex)
+      assert.equal(estimateFee(tx.toBuffer().length), 30000)
+    })
+  })
+})