Tools, FAQ, Tutorials:
Differences of evaluateTransaction() and submitTransaction()
What are the differences of Differences of evaluateTransaction() and submitTransaction() of the fabric-network.Contract class?
✍: FYIcenter.com
Here are the Differences of evaluateTransaction() and submitTransaction() of the fabric-network.Contract class:
evaluateTransaction() method - Calls the given transaction function on the chaincode and returns the response without commit any changes on assets to the ledger.
In other words, evaluateTransaction() performs a transaction and rollbacks any changes at the end.
submitTransaction() method - Calls the given transaction function on the chaincode and returns the response. Changes on assets will be sent to the orderer to commit to the ledger.
In other words, submitTransaction() performs a transaction and commits changes at the end.
For example, if you run evaluate-transaction.js to call queryCar() on "fabcar" chaincode, you get the response.
$ node evaluate-transaction alice mychannel fabcar queryCar CAR12 Tx function and arguments: [ 'queryCar', 'CAR12' ] Tx result: {"colour":"Black","make":"Honda","model":"Accord","owner":"Tom"}
If you run submit-transaction.js to call queryCar() on "fabcar" chaincode, you get the same response.
$ node submit-transaction alice mychannel fabcar queryCar CAR12 Tx function and arguments: [ 'queryCar', 'CAR12' ] Tx result: {"colour":"Black","make":"Honda","model":"Accord","owner":"Tom"}
But if you run evaluate-transaction.js to call createCar() on "fabcar" chaincode, no car is created.
But if you run submit-transaction.js to call createCar() on "fabcar" chaincode, the new car is created.
⇒ Fabric CA (Certificate Authority)
⇐ submit-transaction.js - Submit Chaincode Transaction
2019-04-22, 5918🔥, 0💬
Popular Posts:
How to add images to my EPUB books Images can be added into book content using the XHTML "img" eleme...
Where to find tutorials on RSS specifications? I want to learn it to describe my API services. Here ...
How to use "xsl-transform" Azure API Policy Statement? The "xsl-transform" Policy Statement allows y...
How to view API details on the Publisher Dashboard of an Azure API Management Service? You can follo...
How to add request body examples to my Azure API operation to make it more user friendly? If you hav...