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XuperChain使用Go-SDK调用模板合约“文件hash上链时,更改文件hash_id后仍出现”such hash has existed already的报错 #75

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husun001 opened this issue Mar 18, 2023 · 1 comment

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@husun001
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husun001 commented Mar 18, 2023

XuperChain使用Go-SDK调用模板合约“文件hash上链时,更改文件hash_id后仍出现”such hash has existed already的报错
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我在“工作台”中“合约管理”中调用中修改不同的hash_id均成功了,但是在本地调用时修改不同的hash_id出现了such hash has existed already的报错
智能合约中的存证函数如下:
void storeFileInfo() {
xchain::Context* ctx = this->context();
std::string user_id = ctx->arg("user_id");
std::string hash_id = ctx->arg("hash_id");
std::string file_name = ctx->arg("file_name");
const std::string userKey = UserBucket + "/" + user_id + "/" + hash_id;
const std::string hashKey = HashBucket + "/" + hash_id;
std::string value = user_id + "\t" + hash_id + "\t" + file_name;
std::string tempVal;
if (ctx->get_object(hashKey, &tempVal)) {
ctx->error("storeFileInfo failed, such hash has existed already");
return;
}
if (ctx->put_object(userKey, value) && ctx->put_object(hashKey, value)) {
ctx->ok("storeFileInfo success");
return;
}
ctx->error("storeFileInfo failed");
}
后续更新:
去除了智能合约中的唯一性约束代码:
if (ctx->get_object(hashKey, &tempVal)) {
ctx->error("storeFileInfo failed, such hash has existed already");
return;
多次使用不同的hash_id运行成功,两次使用相同的hash_id上链存储也成功运行。但是实际的区块链存证业务场景中要求对存证文件的唯一性约束,请问错误是处在SDK上还是智能合约上?

@superlitian
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合约执行逻辑与SDK无关,问题应该出在合约上

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