DepositResponse constructor Null safety
Implementation
DepositResponse(this.how, this.id, this.eta, this.minAmount, this.maxAmount, this.feeFixed,
this.feePercent, this.extraInfo);
DepositResponse(this.how, this.id, this.eta, this.minAmount, this.maxAmount, this.feeFixed,
this.feePercent, this.extraInfo);