toJson method
Implementation
Map<String, dynamic> toJson() => {
'asset': asset,
'policy_id': policyId,
'asset_name': assetName,
'fingerprint': fingerprint,
'quantity': quantity,
'initial_mint_tx_hash': initialMintTxHash,
'mint_or_burn_count': mintOrBurnCount,
'onchain_metadata': onchainMetadata?.toJson(),
'metadata': metadata?.toJson(),
};