block: rename verifyPow to checkProofOfWork

src/block.js

@@ -132,7 +132,7 @@ Block.calculateTarget = function (bits) {
   return target
 }
 
-Block.prototype.verifyPow = function () {
+Block.prototype.checkProofOfWork = function () {
   var hash = [].reverse.call(this.getHash())
   var target = Block.calculateTarget(this.bits)
 

test/block.js

@@ -97,7 +97,7 @@ describe('Block', function () {
     })
   })
 
-  describe('verifyPow', function () {
+  describe('checkProofOfWork', function () {
     fixtures.valid.forEach(function (f) {
       var block
 
@@ -106,7 +106,7 @@ describe('Block', function () {
       })
 
       it('returns ' + f.valid + ' for ' + f.id, function () {
-        assert.strictEqual(block.verifyPow(), f.valid)
+        assert.strictEqual(block.checkProofOfWork(), f.valid)
       })
     })
   })