diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9344a41..a143e07 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,23 +1,23 @@
 version: 2.1
 
 jobs:
-  dapp_test:
-    docker:
-      - image: bakii0499/dapptools:0.48.0-solc-0.8.7
-    steps:
-      - run:
-          name: Checkout erc20-helper
-          command: |
-            GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no" git clone git@github.com:maple-labs/erc20-helper.git .
-            git checkout $CIRCLE_BRANCH
-      - run:
-          name: Build and test contracts
-          command: |
-            GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no" git submodule update --init --recursive
-            ./test.sh -c ./config/ci.json
+    dapp_test:
+        docker:
+            - image: bakii0499/dapptools:0.48.0-solc-0.8.7
+        steps:
+            - run:
+                    name: Checkout erc20-helper
+                    command: |
+                        GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no" git clone git@github.com:maple-labs/erc20-helper.git .
+                        git checkout $CIRCLE_BRANCH
+            - run:
+                    name: Build and test contracts
+                    command: |
+                        GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no" git submodule update --init --recursive
+                        ./test.sh -c ./config/ci.json
 workflows:
-  version: 2
-  test_all:
-    jobs:
-      - dapp_test:
-          context: seth
+    version: 2
+    test_all:
+        jobs:
+            - dapp_test:
+                    context: seth
diff --git a/.gitignore b/.gitignore
index bfabe57..3421066 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
 /out
 hevm*
-.vscode/*
\ No newline at end of file
+.vscode/*
+artifacts/*
+docs/*
+metadata.json
diff --git a/package.yaml b/package.yaml
index ae4eb94..b218425 100644
--- a/package.yaml
+++ b/package.yaml
@@ -4,4 +4,5 @@ source: src
 packages:
   - path: src/ERC20Helper.sol
     contractName: ERC20Helper
+    customChecksum: 0xd7fe2d90a5d342dce7b236f581d29dd0be53ed987f2cfedb8ad5e093565cdf50
 customDescription: ERC20Helper Artifacts and ABIs
diff --git a/src/ERC20Helper.sol b/src/ERC20Helper.sol
index 54d2db6..de45af7 100644
--- a/src/ERC20Helper.sol
+++ b/src/ERC20Helper.sol
@@ -5,8 +5,6 @@ import { IERC20Like } from "./interfaces/IERC20Like.sol";
 
 /**
  * @title Small Library to standardize erc20 token interactions.
- * @dev   Code taken from https://github.com/maple-labs/erc20-helper
- * @dev   Acknowledgements to Solmate, OpenZeppelin, and Uniswap-V3 for inspiring this code.
  */
 library ERC20Helper {
 
@@ -34,12 +32,12 @@ library ERC20Helper {
     }
 
     function _call(address token_, bytes memory data_) private returns (bool success_) {
-        if (token_.code.length == 0) return false;
+        if (token_.code.length == uint256(0)) return false;
 
         bytes memory returnData;
         ( success_, returnData ) = token_.call(data_);
 
-        return success_ && (returnData.length == 0 || abi.decode(returnData, (bool)));
+        return success_ && (returnData.length == uint256(0) || abi.decode(returnData, (bool)));
     }
 
 }