Add removeHexPrefix util method

2 files changed, 6 insertions, 6 deletions

diff --git a/packages/sol-cov/src/coverage_manager.ts b/packages/sol-cov/src/coverage_manager.ts
index e932ac081..6a57d07c9 100644
--- a/packages/sol-cov/src/coverage_manager.ts
+++ b/packages/sol-cov/src/coverage_manager.ts
@@ -134,9 +134,7 @@ export class CoverageManager {
             if (traceInfo.address !== constants.NEW_CONTRACT) {
                 // Runtime transaction
                 let runtimeBytecode = (traceInfo as TraceInfoExistingContract).runtimeBytecode;
-                if (runtimeBytecode.startsWith('0x')) {
-                    runtimeBytecode = runtimeBytecode.slice(2);
-                }
+                runtimeBytecode = utils.removeHexPrefix(runtimeBytecode);
                 const contractData = _.find(this._contractsData, { runtimeBytecode }) as ContractData;
                 if (_.isUndefined(contractData)) {
                     throw new Error(`Transaction to an unknown address: ${traceInfo.address}`);
@@ -161,9 +159,7 @@ export class CoverageManager {
             } else {
                 // Contract creation transaction
                 let bytecode = (traceInfo as TraceInfoNewContract).bytecode;
-                if (bytecode.startsWith('0x')) {
-                    bytecode = bytecode.slice(2);
-                }
+                bytecode = utils.removeHexPrefix(bytecode);
                 const contractData = _.find(this._contractsData, contractDataCandidate =>
                     bytecode.startsWith(contractDataCandidate.bytecode),
                 ) as ContractData;
diff --git a/packages/sol-cov/src/utils.ts b/packages/sol-cov/src/utils.ts
index f155043a1..d970c42ee 100644
--- a/packages/sol-cov/src/utils.ts
+++ b/packages/sol-cov/src/utils.ts
@@ -4,6 +4,10 @@ export const utils = {
     compareLineColumn(lhs: LineColumn, rhs: LineColumn): number {
         return lhs.line !== rhs.line ? lhs.line - rhs.line : lhs.column - rhs.column;
     },
+    removeHexPrefix(hex: string): string {
+        const hexPrefix = '0x';
+        return hex.startsWith(hexPrefix) ? hex.slice(hexPrefix.length) : hex;
+    },
     isRangeInside(childRange: SingleFileSourceRange, parentRange: SingleFileSourceRange): boolean {
         return (
             utils.compareLineColumn(parentRange.start, childRange.start) <= 0 &&