Checking if the caller is Publishing Market Fee Address before calling the smart contract

src/tokens/Datatoken.ts

@@ -1362,6 +1362,12 @@ export class Datatoken {
     const dtContract = new this.web3.eth.Contract(this.datatokensAbi, datatokenAddress, {
       from: address
     })
+    const publishingMarketFeeAddress = (
+      await dtContract.methods.getPublishingMarketFee().call()
+    )[0]
+    if (publishingMarketFeeAddress !== address) {
+      throw new Error(`Caller is not the Publishing Market Fee Address`)
+    }
     const estGas = await this.estGasSetPublishingMarketFee(
       datatokenAddress,
       publishMarketFeeAddress,

test/unit/tokens/Datatoken.test.ts

@@ -611,10 +611,7 @@ describe('Datatoken', () => {
       )
     } catch (e) {
       console.log('Message:', e.message)
-      assert(
+      assert(e.message === 'Caller is not the Publishing Market Fee Address')
-        e.message ===
-          'Returned error: VM Exception while processing transaction: revert ERC20Template: not publishMarketFeeAddress'
-      )
     }
     const newPublishingMarketFee = await datatoken.getPublishingMarketFee(
       datatokenAddress,