Implement EIP681 parser (untested)

Podfile

@@ -1,5 +1,5 @@
 def import_pods
-  pod 'scrypt', '~> 1.6'
+  pod 'scrypt', '~> 1.7'
   pod "PromiseKit", "~> 6.3"
   pod 'BigInt', '~> 3.1'
   pod 'CryptoSwift', '~> 0.11'

Podfile.lock

@@ -12,7 +12,7 @@ PODS:
   - PromiseKit/UIKit (6.4.0):
     - PromiseKit/CorePromise
   - Result (3.2.4)
-  - scrypt (1.6):
+  - scrypt (1.7):
     - CryptoSwift (~> 0.11)
   - secp256k1_ios (0.1.3)
   - SipHash (1.2.2)
@@ -22,7 +22,7 @@ DEPENDENCIES:
   - CryptoSwift (~> 0.11)
   - PromiseKit (~> 6.3)
   - Result (~> 3.0)
-  - scrypt (~> 1.6)
+  - scrypt (~> 1.7)
   - secp256k1_ios (from `https://github.com/shamatar/secp256k1_ios.git`)
 
 SPEC REPOS:
@@ -48,10 +48,10 @@ SPEC CHECKSUMS:
   CryptoSwift: ad5208dd2aae0a764ea4ce2c2d34bd067cae67f0
   PromiseKit: ae3616f45d7bb9bf4ff1e91abc9b7a8c48a340e0
   Result: d2d07204ce72856f1fd9130bbe42c35a7b0fea10
-  scrypt: 9b08b4f2a45cb38d17026feb7e287cfca1603125
+  scrypt: a828bd579086977f6db7f9798d1c6332ccaaed4e
   secp256k1_ios: ac9ef04e761f43c58012b28548afa91493761f17
   SipHash: fad90a4683e420c52ef28063063dbbce248ea6d4
 
-PODFILE CHECKSUM: 6adb2e455ccff337782d78f394b1fdaa1d087882
+PODFILE CHECKSUM: f536cef086b9f22f5c02cedf59f84825befa9b5f
 
 COCOAPODS: 1.5.3