Utxo.fromMap constructor
Create Utxo instance from utxo Map
Implementation
Utxo.fromMap(Map<String, dynamic> utxoMap) :
this.txid = utxoMap['txid'],
this.vout = utxoMap['vout'],
this.amount = utxoMap['amount'],
this.satoshis = utxoMap['satoshis'],
this.height = utxoMap.containsKey('height') ? utxoMap['height'] : null,
this.confirmations = utxoMap['confirmations'];