Recover single asset history - hyperledger

Question

I'm trying to recover the history of a single asset. The model is defined like the following
namespace org.example.basic
asset SampleAsset identified by assetId {
o String assetId
--> SampleParticipant owner
o String value
}
participant SampleParticipant identified by participantId {
o String participantId
o String firstName
o String lastName
}
transaction GetAssetHistory {
o String assetId
}
event SampleEvent {
--> SampleAsset asset
o String oldValue
o String newValue
}
I generate a single participant and a new asset referencing to the previous participant. And I proceed to update the asset value variable value. But reading about asset update I found the following:
async function getAssetHistory(tx) {
//How can I get a single asset history using the tx.assetId value??
let historian = await businessNetworkConnection.getHistorian();
let historianRecords = historian.getAll();
console.log(prettyoutput(historianRecords));
}
When I deploy the bna and I call the function I get the following:
img
In other functions i use the RuntimeApi but I dont know if businessNetworkConnection is a Runtime API call.
Any idea of how can a get a single asset history?
Any example on internet?
***************** UPDATE
I change the way to recover a particula asset history. Doing the following:
In js file
/**
* Sample read-only transaction
* #param {org.example.trading.MyPartHistory} tx
* #returns {org.example.trading.Trader[]} All trxns
* #transaction
*/
async function participantHistory(tx) {
console.log('1');
const partId = tx.tradeid;
console.log('2');
const nativeSupport = tx.nativeSupport;
// const partRegistry = await getParticipantRegistry('org.example.trading.Trader')
console.log('3');
const nativeKey = getNativeAPI().createCompositeKey('Asset:org.example.trading.Trader', [partId]);
console.log('4');
const iterator = await getNativeAPI().getHistoryForKey(nativeKey);
let results = [];
let res = {done : false};
while (!res.done) {
res = await iterator.next();
if (res && res.value && res.value.value) {
let val = res.value.value.toString('utf8');
if (val.length > 0) {
console.log("#debug val is " + val );
results.push(JSON.parse(val));
}
}
if (res && res.done) {
try {
iterator.close();
}
catch (err) {
}
}
}
var newArray = [];
for (const item of results) {
newArray.push(getSerializer().fromJSON(item));
}
console.log("#debug the results to be returned are as follows: ");
return newArray; // returns something to my NodeJS client (called via REST API)
}
In model file
#commit(false)
#returns(Trader[])
transaction MyPartHistory {
o String tradeId
}
I create a single asset an di update then with other values. But whe I call the MyPartHistory i get the following message:
Error: Native API not available in web runtime

Answer 1

use of the native api is only available when you are running your business network in a real fabric environment. You can't use it in the online playground environment. You will have to setup a real fabric environment and then run playground locally connecting to that fabric in order to test your business network.