本篇內容介紹了“Bytom儲蓄分紅合約怎么實現(xiàn)”的有關知識，在實際案例的操作過程中，不少人都會遇到這樣的困境，接下來就讓小編帶領大家學習一下如何處理這些情況吧！希望大家仔細閱讀，能夠學有所成！
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儲蓄分紅合約指的是項目方發(fā)起了一個鎖倉計劃（即儲蓄合約和取現(xiàn)合約），用戶可以在準備期自由選擇鎖倉金額參與該計劃，等到鎖倉到期之后還可以自動獲取鎖倉的利潤。用戶可以在準備期內（dueBlockHeight）參與儲蓄，按照合約規(guī)定可以 1：1 獲取同等數(shù)量的儲蓄票據(jù)資產，同時用戶鎖倉的資產（deposit）將放到取現(xiàn)合約中，并且項目方是無法動用的，等到鎖倉期限（expireBlockHeight）一到，用戶便可以調用取現(xiàn)合約將自己儲蓄的資產連本待息一同取出來。
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// 儲蓄合約
import "./FixedLimitProfit"
contract FixedLimitCollect(assetDeposited: Asset,
totalAmountBill: Amount,
totalAmountCapital: Amount,
dueBlockHeight: Integer,
expireBlockHeight: Integer,
additionalBlockHeight: Integer,
banker: Program,
bankerKey: PublicKey) locks billAmount of billAsset {
clause collect(amountDeposited: Amount, saver: Program) {
verify below(dueBlockHeight)
verify amountDeposited <= billAmount && totalAmountBill <= totalAmountCapital
define sAmountDeposited: Integer = amountDeposited/100000000
define sTotalAmountBill: Integer = totalAmountBill/100000000
verify sAmountDeposited > 0 && sTotalAmountBill > 0
if amountDeposited < billAmount {
lock amountDeposited of assetDeposited with FixedLimitProfit(billAsset, totalAmountBill, totalAmountCapital, expireBlockHeight, additionalBlockHeight, banker, bankerKey)
lock amountDeposited of billAsset with saver
lock billAmount-amountDeposited of billAsset with FixedLimitCollect(assetDeposited, totalAmountBill, totalAmountCapital, dueBlockHeight, expireBlockHeight, additionalBlockHeight, banker, bankerKey)
} else {
lock amountDeposited of assetDeposited with FixedLimitProfit(billAsset, totalAmountBill, totalAmountCapital, expireBlockHeight, additionalBlockHeight, banker, bankerKey)
lock billAmount of billAsset with saver
}
}
clause cancel(bankerSig: Signature) {
verify above(dueBlockHeight)
verify checkTxSig(bankerKey, bankerSig)
unlock billAmount of billAsset
}
}// 取現(xiàn)合約(本金加利息)
contract FixedLimitProfit(assetBill: Asset,
totalAmountBill: Amount,
totalAmountCapital: Amount,
expireBlockHeight: Integer,
additionalBlockHeight: Integer,
banker: Program,
bankerKey: PublicKey) locks capitalAmount of capitalAsset {
clause profit(amountBill: Amount, saver: Program) {
verify above(expireBlockHeight)
define sAmountBill: Integer = amountBill/100000000
define sTotalAmountBill: Integer = totalAmountBill/100000000
verify sAmountBill > 0 && sTotalAmountBill > 0 && amountBill < totalAmountBill
define gain: Integer = totalAmountCapital*sAmountBill/sTotalAmountBill
verify gain > 0 && gain <= capitalAmount
if gain < capitalAmount {
lock amountBill of assetBill with banker
lock gain of capitalAsset with saver
lock capitalAmount - gain of capitalAsset with FixedLimitProfit(assetBill, totalAmountBill, totalAmountCapital, expireBlockHeight, additionalBlockHeight, banker, bankerKey)
} else {
lock amountBill of assetBill with banker
lock capitalAmount of capitalAsset with saver
}
}
clause cancel(bankerSig: Signature) {
verify above(additionalBlockHeight)
verify checkTxSig(bankerKey, bankerSig)
unlock capitalAmount of capitalAsset
}
}合約的源代碼說明可以具體參考Equity合約介紹.
時間期限不是具體的時間，而是通過區(qū)塊高度來大概估算的（平均區(qū)塊時間間隔大概為2.5分鐘）
比原的精度是8, 即 1BTM = 100000000 neu，正常情況下參與計算都是以neu為單位的，然而虛擬機的int64類型的最大值是9223372036854775807，為了避免數(shù)值太大導致計算溢出，所以對計算的金額提出了金額限制（即amountBill/100000000）
另外clause cancel是項目方的管理方法，如果儲蓄或者取現(xiàn)沒有滿額，項目方也可以回收剩余的資產
編譯Equity合約可以參考一下Equity編譯器的介紹說明。假如儲蓄合約FixedLimitCollect的參數(shù)如下：
assetDeposited :c6b12af8326df37b8d77c77bfa2547e083cbacde15cc48da56d4aa4e4235a3ee totalAmountBill :10000000000 totalAmountCapital :20000000000 dueBlockHeight :1070 expireBlockHeight :1090 additionalBlockHeight :1100 banker :0014dedfd406c591aa221a047a260107f877da92fec5 bankerKey :055539eb36abcaaf127c63ae20e3d049cd28d0f1fe569df84da3aedb018ca1bf
其中bankerKey是管理員的publicKey，可以通過比原鏈的接口list-pubkeys來獲取，注意管理員需要保存一下對應的rootXpub和Path，否則無法正確調用clause cancel。
實例化合約命令如下：
// 儲蓄合約 ./equity FixedLimitCollect --instance c6b12af8326df37b8d77c77bfa2547e083cbacde15cc48da56d4aa4e4235a3ee 10000000000 20000000000 1070 1090 1100 0014dedfd406c591aa221a047a260107f877da92fec5 055539eb36abcaaf127c63ae20e3d049cd28d0f1fe569df84da3aedb018ca1bf // 取現(xiàn)合約 ./equity FixedLimitProfit --instance c6b12af8326df37b8d77c77bfa2547e083cbacde15cc48da56d4aa4e4235a3ee 10000000000 20000000000 1090 1100 0014dedfd406c591aa221a047a260107f877da92fec5 055539eb36abcaaf127c63ae20e3d049cd28d0f1fe569df84da3aedb018ca1bf
發(fā)布合約交易即將資產鎖定到合約中。由于目前無法在比原的dashboard上構造合約交易，所以需要借助外部工具來發(fā)送合約交易，比如postman。按照上述示意圖所示，項目方需要發(fā)布1000個儲蓄資產的儲蓄合約和200個利息資產取現(xiàn)合約。假設項目方需要發(fā)布1000個儲蓄資產（假如精度為8,那么1000個在比原鏈中表示為100000000000）的鎖倉合約，那么他需要將對應數(shù)量的票據(jù)鎖定在儲蓄合約中，其交易模板如下：
{
"base_transaction": null,
"actions": [
{
"account_id": "0ILGLSTC00A02",
"amount": 20000000,
"asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"type": "spend_account"
},
{
"account_id": "0ILGLSTC00A02",
"amount": 100000000000,
"asset_id": "13016eff73ffb7539a69e122f80f5c1cc94446773ac3f64dec290429f87e73b3",
"type": "spend_account"
},
{
"amount": 100000000000,
"asset_id": "13016eff73ffb7539a69e122f80f5c1cc94446773ac3f64dec290429f87e73b3",
"control_program": "20055539eb36abcaaf127c63ae20e3d049cd28d0f1fe569df84da3aedb018ca1bf160014dedfd406c591aa221a047a260107f877da92fec5024c04024204022e040500c817a8040500e40b540220c6b12af8326df37b8d77c77bfa2547e083cbacde15cc48da56d4aa4e4235a3ee4d3b02597a642f0200005479cda069c35b797ca153795579a19a695a790400e1f5059653790400e1f505967c00a07c00a09a69c35b797c9f9161644d010000005b79c2547951005e79895d79895c79895b7989597989587989537a894caa587a649e0000005479cd9f6959790400e1f5059653790400e1f505967800a07800a09a5c7956799f9a6955797b957c96c37800a052797ba19a69c3787c9f91616487000000005b795479515b79c1695178c2515d79c16952c3527994c251005d79895c79895b79895a79895979895879895779895679890274787e008901c07ec1696399000000005b795479515b79c16951c3c2515d79c16963aa000000557acd9f69577a577aae7cac890274787e008901c07ec169515b79c2515d79c16952c35c7994c251005d79895c79895b79895a79895979895879895779895679895579890274787e008901c07ec169632a020000005b79c2547951005e79895d79895c79895b7989597989587989537a894caa587a649e0000005479cd9f6959790400e1f5059653790400e1f505967800a07800a09a5c7956799f9a6955797b957c96c37800a052797ba19a69c3787c9f91616487000000005b795479515b79c1695178c2515d79c16952c3527994c251005d79895c79895b79895a79895979895879895779895679890274787e008901c07ec1696399000000005b795479515b79c16951c3c2515d79c16963aa000000557acd9f69577a577aae7cac890274787e008901c07ec16951c3c2515d79c169633b020000547acd9f69587a587aae7cac747800c0",
"type": "control_program"
}
],
"ttl": 0,
"time_range": 1521625823
}合約交易成功后，合約control_program對應的UTXO將會被所有用戶查詢到，使用比原鏈的接口list-unspent-outputs即可查詢。
此外，開發(fā)者需要存儲一下合約UTXO的assetID和program，以便在DAPP的前端頁面的config配置文件和bufferserver緩沖服務器中調用。如上所示：
// 儲蓄合約 assetID：13016eff73ffb7539a69e122f80f5c1cc94446773ac3f64dec290429f87e73b3 program：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 // 取現(xiàn)合約 assetID：c6b12af8326df37b8d77c77bfa2547e083cbacde15cc48da56d4aa4e4235a3ee program：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