derp2.swift

class BcomBlockchainTransactionBuilder {
    private var tx: BcomBlockchainTransaction

    init(signingWallet: BcomWallet, chainAssetProtocol: ChainAssetProtocol, amount: Decimal, assetId: String) {
        tx = BcomBlockchainTransaction(signingWallet: signingWallet, chainAssetProtocol: chainAssetProtocol, amount: amount, assetId: assetId)
    }
    
    //Chain Level Builder
    func buildBitcoinCash(utxos: [UTXO], satsPerByteFee: Int) -> BitcoinCashBuilder {
        tx.satsPerByteFee = satsPerByteFee
        tx.utxos = utxos
        return BitcoinCashBuilder(tx: tx)
    }
    
    class BitcoinCashBuilder {
        private var tx: BcomBlockchainTransaction
        init(tx: BcomBlockchainTransaction) { self.tx = tx }
        
        func buildSLP(slpUtxos: [SLPUTXO]) -> SLPBuilder {
            return SLPBuilder(tx: tx, slpUtxos: slpUtxos)
        }
        
        //finish here
        func build() -> BcomBlockchainTransaction {
            return tx
        }
    }
    
    class SLPBuilder {
        private var tx: BcomBlockchainTransaction
        init(tx: BcomBlockchainTransaction, slpUtxos: [SLPUTXO]) { self.tx = tx }
        
        func build() -> BcomBlockchainTransaction{
            return tx
        }
}

public class BlockchainTransactionGenerator {
   
    
    public func createTransaction(_ tx: BcomBlockchainTransaction) -> Data {
        

        
        switch tx.chainAssetProtocol {
        case .bch, .btc:
            return createBitcoinTransaction(wallet: tx.wallet,
                                            chainAssetProtocol: tx.chainAssetProtocol,
                                            amount: tx.amount,
                                            useMaxAmount: false,
                                            destination: "",
                                            allAvailableUTXOs: tx.utxos!)
        case .slp:
            return createSLPTransaction()
        case .eth:
            return createEthereumTransaction()
        case .erc20:
            return createEthereumContractTransaction()
        }
    }
}

     BcomBlockchainTransactionBuilder(signingWallet: wallet, chainAssetProtocol: .bch, amount: Decimal.zero, assetId: "bch")
            .buildBitcoinCash(utxos: [], satsPerByteFee: 1)
            .buildSLP(slpUtxos: [])
            .build()