Bitcoinj
手續費及設定
我試圖估算最終金額確定後的費用。我會說我熟悉bitcoinj，但不完全熟悉java，所以我仍在學習如何編碼和探索如何獲取資訊。
這是我現在的程式碼。我把所有東西都放在一個方法裡。
public static String SendFund(String amount, String receiver){ String text; Coin value = Coin.parseCoin(amount); LegacyAddress to = LegacyAddress.fromBase58(MainPage.params, receiver); try { System.out.println(gbal()+" - "+gaddress()); Wallet.SendResult result = kit.wallet().sendCoins(kit.peerGroup(), to, value); text = "<html>"+amount+" BTC sent to address <br/><br/>"+receiver+".</html>"; System.out.println("Check transaction : https://testnet.blockchain.info/tx/"+result.tx.getHashAsString()); }catch(InsufficientMoneyException e){ text = "Insufficient Funds."; } return text; }目前它不處理費用。但是當我查看這樣的交易時 ==> <https://testnet.blockchain.info/tx/194b2a7505a537307abe9443b048bc7ddce6ca0d833d5758c3be3c03a9c7b838>你可以清楚地看到費用。
另外，當我知道錢包沒有足夠的錢時故意嘗試發送硬幣時，它並沒有告訴我它失敗了
0.8625106 - n2uEm2QXqe2PCSsbHTdAJN9aDm2mDjz6iZ May 02, 2018 5:08:58 PM org.bitcoinj.wallet.Wallet completeTx INFO: Completing send tx with 1 outputs totalling 1.00 BTC and a fee of 0.001 BTC/kB我做錯了什麼沒有檢查？我是否必須實際執行 if 語句才能檢查？還有我怎樣才能可靠地計算最終金額是多少？
我能夠解決這個問題。
public static String estFee(String amount, String receiver, WalletAppKit kit, NetworkParameters params){ try { String value2 = String.format("%.8f",Double.parseDouble(amount) * MainPage.handleFee); //String value1 = String.format("%.8f",Double.parseDouble(amount) - Double.parseDouble(value2)); String value1 = String.format("%.8f",Double.parseDouble(amount)); Coin val1 = Coin.parseCoin(value1); //Coin val2 = Coin.parseCoin(value2); System.out.println(receiver); Address target1 = Address.fromBase58(params, receiver); //Address target2 = Address.fromBase58(params, MainPage.handleAddress); Transaction tx = new Transaction(params); tx.addOutput(val1, target1); //tx.addOutput(val2, target2); SendRequest req = SendRequest.forTx(tx); req.feePerKb = Coin.parseCoin("0.0001"); kit.wallet().completeTx(req); String[] temp = req.tx.getFee().toFriendlyString().split(" "); return String.format("%.8f",Double.parseDouble(temp[0])); }catch(InsufficientMoneyException e){ Double mis = (double)e.missing.getValue()/100000000; System.out.println(BackEnd.strFormat("ERROR","NSF","INFO","Not enough money. You are missing "+mis+". This was to retrieve an estimated fee.")); return "0"; } }圖書館不是這樣來的，所以我不得不即興創作解決方案。