example.ts

/**
 * Example code to create an asset and save the meta to arweave
 **/

// base token uri
let URL = 'http://localhost:8081/asset/';

// get the chain id from the eth provider. It's needed for the metadata DID
const chainid = provider.getChainId();

// Get the factory
const factory = new ethers.Contract(factoryAddress, factoryabi.abi, signer);

// NOTE: before saving metadata to storage, ensure the caller's wallet is connected
// and they have sufficient balance to pay to create the Asset

// We need the bioasset address to create the metadata. BEFORE we actually create it. Use this 
// 'free' call to get the address vs.filtering the tx receipt.  Only temporary. Doesn't actually create it
const bioAssetAddress = await factory.callStatic.createAsset("doesn't matter");

// See this helper (may move in the future) to create the asset information from the UI form
// https://github.com/synbionet/synbionet-indexer/blob/main/src/metadata.ts#L56
const meta = createMetaData('...', chainid);

// Save the meta data to storage via the indexer. psuedo code...
const resp = request.post('/asset).send(meta);

if(resp.status == 200) {
   const tokenURI = `${URL}/${meta.did}`;

   // ... now really create the contract
   const tx = await factory.createAsset(tokenURI);
   await tx.wait();
}

// contract is deployed...
const basset = new ethers.Contract(assetAddress, bioassetabi.abi, signer);