How to get TimeStamps in Hyperledger Composer

Question

How to get timestamo in a deterministic way in transaction function. I want something similar to stub.GetTxTimestamp() that can be used in Go version of Fabric's chaincode. Any idea?

Answer 1

Here's an example that works with basic-sample-network network:

asset SampleAsset identified by assetId {
  o String assetId
  --> SampleParticipant owner
  o String value
  o DateTime timestamp
}

function onSampleTransaction(sampleTransaction) {
  sampleTransaction.asset.value = sampleTransaction.newValue;
  sampleTransaction.asset.timestamp = sampleTransaction.timestamp;
  return getAssetRegistry('org.acme.sample.SampleAsset')
       .then(function (assetRegistry) {
               return assetRegistry.update(sampleTransaction.asset);
        });
}