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+# Analysis of Smart Contract Security Vulnerabilities and Tools ![](https://img.shields.io/badge/-Live-brightgreen)
+![](https://img.shields.io/badge/Batch-UG21CYS-lightgreen) ![](https://img.shields.io/badge/Batch-PG21CYS-green) ![](https://img.shields.io/badge/Batch-UG22CYS-lightgreen) ![](https://img.shields.io/badge/Batch-PG21CYS-green) ![](https://img.shields.io/badge/Batch-PhD-darkgreen) ![](https://img.shields.io/badge/-B_RIG-darkgreen)<br/>   ![](https://img.shields.io/badge/BlockchainCourse-21CY712-green)  ![](https://img.shields.io/badge/-M.Tech_Dissertation-blue) ![](https://img.shields.io/badge/Focus-Smart_Contract_Security-yellow) <br/>
+![](https://img.shields.io/badge/Blockchain-Ethereum-blue)   <br/> 
+![](https://img.shields.io/badge/Language-Solidity-blue)
+
+## SOLIDITY_BYTE_ARRAY_INSTEAD_BYTES
+### Rule Description
+<p>
+    Use <code>bytes</code> instead of <code>byte[]</code> for lower gas consumption.
+</p>
+### Solidity-Rules
+
+![](https://img.shields.io/badge/Pattern_ID-f13a9f-gold) ![](https://img.shields.io/badge/Severity-1-brown) 
+
+```
+typeName
+                        [typeName/elementaryTypeName[text()[1] = "byte"]]
+                        [matches(text()[1], "^\[.*\]$")]
+```
+
+
+
+### Sample Code
+
+```
+pragma solidity 0.4.24;
+contract C {
+
+    // <yes> <report> SOLIDITY_BYTE_ARRAY_INSTEAD_BYTES f13a9f
+    byte[] someVariable1;
+    
+    bytes someVariable2;
+    uint[] data;
+}
+```
+
+### Abstract Syntax Tree 
+
+[Click Here](https://astexplorer.net/#/gist/81c00d2664b3a76545a8024e42c8a238/489d5aa42067fb6025a78c853016c00806d06a3f) to view the AST for the above code. Code generated from AST Explorer using _solidity-parser-antlr-0.4.11_
+
+### Code Result
+
+```
+SOLIDITY_BYTE_ARRAY_INSTEAD_BYTES
+patternId: f13a9f
+severity: 1
+line: 5
+column: 4
+content: byte[]
+
+ruleId: SOLIDITY_VISIBILITY
+patternId: b51ce0
+severity: 1
+line: 5
+column: 4
+content: byte[]someVariable1;
+
+ruleId: SOLIDITY_VISIBILITY
+patternId: b51ce0
+severity: 1
+line: 7
+column: 4
+content: bytessomeVariable2;
+
+ruleId: SOLIDITY_VISIBILITY
+patternId: b51ce0
+severity: 1
+line: 8
+column: 4
+content: uint[]data;
+
+SOLIDITY_VISIBILITY :3
+SOLIDITY_BYTE_ARRAY_INSTEAD_BYTES :1
+
+
+```