摘要:作者羋橙比原項目倉庫地址地址本文解析的為比原提供的幣幣合約模板如下導讀初次接觸比原只能合約的請點擊比原智能合約入門和語言入門學習,方便更好的理解該文檔鎖定合約第一步調用生成以下是相關代碼片段第二步調用獲取以下是相關代碼片段第三
作者:羋橙
比原項目倉庫:
Github地址:https://github.com/Bytom/bytom
Gitee地址:https://gitee.com/BytomBlockc...
本文解析的為比原提供的幣幣合約 模板如下:
contract TradeOffer(assetRequested: Asset, amountRequested: Amount, seller: Program, cancelKey: PublicKey) locks offered { clause trade() requires payment: amountRequested of assetRequested { lock payment with seller unlock offered } clause cancel(sellerSig: Signature) { verify checkTxSig(cancelKey, sellerSig) unlock offered } }
導讀:
初次接觸比原只能合約的請點擊[比原智能合約入門](https://bbs.bbug.org.cn/thread-26.htm) 和 [
Equity 語言入門](https://bbs.bbug.org.cn/threa... 學習,方便更好的理解該文檔
鎖定合約 第一步:調用create-account-receiver 生成 control_program以下是相關代碼片段:
sendHttpPost("{"account_id":"0IJVD7MNG0A02"}","create-account-receiver","http://127.0.0.1:9888","");第二步調用list-pubkeys 獲取 pubkey
以下是相關代碼片段:
sendHttpPost("{"account_id":"0IJVD7MNG0A02"}","list-pubkeys","http://127.0.0.1:9888","");第三步: 將1 2步獲取的值調用compile接口編譯合約獲得program 合約程序
以下是相關代碼片段:
JSONObject param=new JSONObject(); JSONArray agrs=new JSONArray(); //合約的四個參數值 JSONObject assetParam=new JSONObject(); assetParam.put("string","81d097312645696daea84b761d2898d950d8fba0de06c9267d8513b16663dd3a"); agrs.put(assetParam); JSONObject amountParam=new JSONObject(); amountParam.put("integer",200000000l); agrs.put(amountParam); JSONObject programParam=new JSONObject(); programParam.put("string",control_program); agrs.put(programParam); JSONObject publicKeyParam=new JSONObject(); publicKeyParam.put("string",pubkey); agrs.put(publicKeyParam); param.put("agrs",agrs); param.put("contract","contract TradeOffer(assetRequested: Asset, amountRequested: Amount, seller: Program, cancelKey: PublicKey) locks offered { clause trade() requires payment: amountRequested of assetRequested { lock payment with seller unlock offered } clause cancel(sellerSig: Signature) { verify checkTxSig(cancelKey, sellerSig) unlock offered } }"); //調用編譯合約 sendHttpPost(param.toString(),"list-pubkeys","http://127.0.0.1:9888","");第四步:將program 傳入build-transaction接口去build一個交易的到data
以下是相關代碼片段:
param=new JSONObject(); agrs=new JSONArray(); JSONObject spendAccount=new JSONObject(); spendAccount.put("account_id","0H757LPD00A02"); spendAccount.put("amount",9909099090000l); spendAccount.put("asset_id","161b9767b664df907fa926a31f9e835236e57f3e9ccc5f80c12bd97723322652"); spendAccount.put("type","spend_account"); agrs.put(spendAccount); JSONObject controlAccount=new JSONObject(); controlAccount.put("control_program",program); controlAccount.put("amount",9909099090000l); controlAccount.put("asset_id","161b9767b664df907fa926a31f9e835236e57f3e9ccc5f80c12bd97723322652"); controlAccount.put("type","control_program"); agrs.put(controlAccount); JSONObject spendAccount2=new JSONObject(); spendAccount2.put("account_id","0H757LPD00A02"); spendAccount2.put("amount",6000000l); spendAccount2.put("asset_id","ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); spendAccount2.put("type","spend_account"); agrs.put(spendAccount2); param.put("actions",agrs); param.put("ttl",0); sendHttpPost(param.toString(),"build-transaction","http://127.0.0.1:9888","");第五步:輸入密碼調用sign-transaction簽名第四步build的data 得到raw_transaction
以下是相關代碼片段:
param=new JSONObject(); param.put("password","xxx"); param.put("transaction",data); sendHttpPost(param.toString(),"sign-transaction","http://127.0.0.1:9888","");第六步:調用submit-transactions提交交易
以下是相關代碼片段:
param=new JSONObject(); param.put("raw_transaction",raw_transaction); sendHttpPost(param.toString(),"submit-transactions","http://127.0.0.1:9888","");解鎖/取消合約 首先需要decode出生成合約時候的參數 調用list-unspent-outputs 獲取生成的合約信息獲取program
以下是相關代碼片段:
param=new JSONObject(); param.put("id",outputid); param.put("smart_contract",true); sendHttpPost(param.toString(),"list-unspent-outputs","http://127.0.0.1:9888","");調用decode-program 傳入獲取生成的合約參數信息
以下是相關代碼片段:
param=new JSONObject(); param.put("program",program); sendHttpPost(param.toString(),"decode-program","http://127.0.0.1:9888","");
需要注意的是decode出來的為值是逆序的(后續會有文章詳細介紹)
解鎖/取消其實就是把生成合約的步驟中的第三步去掉,替換調用生成合約第四步的參數即可取消合約的構造參數如下:
spendAccountUnspentOutput = arguments: [{ type: "raw_tx_signature", // 生成合約第二步的pubkeylist 詳情 raw_data: { derivation_path: pubkeylist.pubkey_infos[0].derivation_path, xpub: pubkeylist.root_xpub } }, { type: "data", raw_data: { // 參數偏移量 在一個合約里是固定的 value: "13000000" } }], output_id: output_id, type: "spend_account_unspent_output" } const controlAction = { type: "control_program", amount: 100000000, asset_id: asset_id, control_program:control_program } const gasAction = { type: "spend_account", account_id:account_id, asset_alias: "BTM", amount: 50000000 }
執行合約的參數構造如下:
const spendAccountUnspentOutput = { arguments: [{ type: "data", raw_data: { // 00000000 指的是第一個 clause,表示直接執行,無需跳轉 value: "00000000" } }], output_id: output_id, type: "spend_account_unspent_output" } // 合約執行提供的資產 const issueControlAction = { control_program: control_program, amount: 100000000, asset_id: asset_id, type: "control_program" } // 合約執行提供的資產 const issueSpendAction = { account_id: account_id, amount: 100000000, asset_id: asset_id, type: "spend_account" } // 礦工費 const gasAction = { type: "spend_account", account_id: account_id, asset_alias: "BTM", amount: 50000000 } // 合約執行獲得資產對象 const controlAction = { type: "control_program", amount: 100000000, asset_id: asset_id, control_program: compileData.control_program }
build 操作其實就是指定輸入輸出的過程,詳情請查看 官方build文檔 和 官方api文檔
備注調用比原基于okhttp接口javautil 如下:
public static String sendHttpPost(String bodyStr,String method,String bytomApiserverUrl,String bytomApiserverToken) throws IOException { OkHttpClient client = new OkHttpClient(); MediaType mediaType = MediaType.parse("application/json"); RequestBody body = RequestBody.create(mediaType, bodyStr); Request request = new Request.Builder() .url(bytomApiserverUrl+"/"+method) .post(body) .addHeader("cache-control", "no-cache") .addHeader("Connection", "close") .build(); if (bytomApiserverUrl==null || bytomApiserverUrl.contains("127.0.0.1") || bytomApiserverUrl.contains("localhost")){ }else { byte[] encodedAuth = Base64.encodeBase64(bytomApiserverToken.getBytes(Charset.forName("US-ASCII"))); String authHeader = "Basic " + new String(encodedAuth); request = new Request.Builder() .url(bytomApiserverUrl+"/"+method) .post(body) .addHeader("authorization", authHeader) .addHeader("cache-control", "no-cache") .addHeader("Connection", "close") .build(); } Response response = client.newCall(request).execute(); return response.body().string(); }
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