travis yaml conslidation via anchors

.travis.yml

@@ -58,28 +58,8 @@ jobs:
           target_paths:
             - /daemon/build-${TRAVIS_BUILD_NUMBER}_commit-${TRAVIS_COMMIT:0:7}_branch-${TRAVIS_BRANCH}$([ ! -z ${TRAVIS_TAG} ] && echo _tag-${TRAVIS_TAG})/win/
 
-    - name: "Linux"
-      install:
-        - pip install pyinstaller
-        - pip install git+https://github.com/lbryio/torba.git
-        - pip install git+https://github.com/lbryio/lbryschema.git
-        - pip install -e .
-      script:
-        - pyinstaller -F -n lbrynet lbrynet/cli.py
-        - ./dist/lbrynet --version
-      addons:
-        artifacts:
-          working_dir: dist
-          paths:
-            - lbrynet
-          # artifact uploader thinks lbrynet is a directory, https://github.com/travis-ci/artifacts/issues/78
-          target_paths:
-            - /daemon/build-${TRAVIS_BUILD_NUMBER}_commit-${TRAVIS_COMMIT:0:7}_branch-${TRAVIS_BRANCH}$([ ! -z ${TRAVIS_TAG} ] && echo _tag-${TRAVIS_TAG})/linux/lbrynet
-
-    - name: "Mac"
-      os: osx
-      osx_image: xcode9.4
-      language: generic
+    - &build
+      name: "Linux"
       install:
         - pip3 install pyinstaller
         - pip3 install git+https://github.com/lbryio/torba.git
@@ -88,6 +68,7 @@ jobs:
       script:
         - pyinstaller -F -n lbrynet lbrynet/cli.py
         - ./dist/lbrynet --version
+      env: OS=linux
       addons:
         artifacts:
           working_dir: dist
@@ -95,7 +76,14 @@ jobs:
             - lbrynet
           # artifact uploader thinks lbrynet is a directory, https://github.com/travis-ci/artifacts/issues/78
           target_paths:
-            - /daemon/build-${TRAVIS_BUILD_NUMBER}_commit-${TRAVIS_COMMIT:0:7}_branch-${TRAVIS_BRANCH}$([ ! -z ${TRAVIS_TAG} ] && echo _tag-${TRAVIS_TAG})/mac/lbrynet
+            - /daemon/build-${TRAVIS_BUILD_NUMBER}_commit-${TRAVIS_COMMIT:0:7}_branch-${TRAVIS_BRANCH}$([ ! -z ${TRAVIS_TAG} ] && echo _tag-${TRAVIS_TAG})/${OS}/lbrynet
+
+    - <<: *build
+      name: "Mac"
+      os: osx
+      osx_image: xcode9.4
+      language: generic
+      env: OS=mac
 
 cache:
   directories:

lbrynet/wallet/ledger.py

@@ -90,13 +90,13 @@ class Headers(BaseHeaders):
 
         # Retarget
         bnPowLimit = _ArithUint256(self.ledger.max_target)
-        bnNew = _ArithUint256.SetCompact(last['bits'])
+        bnNew = _ArithUint256.set_compact(last['bits'])
         bnNew *= nModulatedTimespan
         bnNew //= nModulatedTimespan
         if bnNew > bnPowLimit:
             bnNew = bnPowLimit
 
-        return bnNew.GetCompact(), bnNew._value
+        return bnNew.get_compact(), bnNew._value
 
 
 class MainNetLedger(BaseLedger):

lbrynet/wallet/manager.py

@@ -3,16 +3,16 @@ import json
 from binascii import hexlify
 from twisted.internet import defer
 
-from torba.manager import WalletManager as BaseWalletManager
+from torba.basemanager import BaseWalletManager
 
 from lbryschema.uri import parse_lbry_uri
 from lbryschema.error import URIParseError
 from lbryschema.claim import ClaimDict
 
-from .ledger import MainNetLedger  # pylint: disable=unused-import
+from .ledger import MainNetLedger
 from .account import generate_certificate
 from .transaction import Transaction
-from .database import WalletDatabase  # pylint: disable=unused-import
+from .database import WalletDatabase
 
 
 class BackwardsCompatibleNetwork:
@@ -31,11 +31,11 @@ class BackwardsCompatibleNetwork:
 class LbryWalletManager(BaseWalletManager):
 
     @property
-    def ledger(self):  # type: () -> MainNetLedger
+    def ledger(self) -> MainNetLedger:
         return self.default_account.ledger
 
     @property
-    def db(self):  # type: () -> WalletDatabase
+    def db(self) -> WalletDatabase:
         return self.ledger.db
 
     @property