How to get the transaction detail from payloadHash?

[huhaiqing]

Hi,

When I query the transaction by REST API, it returns the below json data. command: curl http://localhost:5000/transactions/a11780d3-0c81-41d2-9cf4-883e6a241cd8 -X GET -i -H "Content-Type:application/json" -H "Accept:application/json"

Response: { "type": 2, "chaincodeID": "EoABNTExNTFhMDM0MjY3Yjk1ZWZlZmRkOGMzNmRkZTAxMjlhMWEzMTA4ZTgzMDUzNzBiYWRhYWJkZjgwYWNjNzYzMDlhZGNkYzU1NDhhZmFmMTFhMGMzNzhhMWNlNjJlN2E0ZTNiYWFhNDMxMDZmOTVhMzZhNDJjNjJhMzc5YzJkMDg=", "payload": "CsgBCAESgwESgAE1MTE1MWEwMzQyNjdiOTVlZmVmZGQ4YzM2ZGRlMDEyOWExYTMxMDhlODMwNTM3MGJhZGFhYmRmODBhY2M3NjMwOWFkY2RjNTU0OGFmYWYxMWEwYzM3OGExY2U2MmU3YTRlM2JhYWE0MzEwNmY5NWEzNmE0MmM2MmEzNzljMmQwOBo+Cg9hZGRfbG9hbl9jcmVkaXQSC2xhb3dhbmcxOTg3Eh4yMDE2LTEyLTAxIGxvYW4gZnJvbSBBQkMgNTAwMDA=", "uuid": "a11780d3-0c81-41d2-9cf4-883e6a241cd8", "timestamp": { "seconds": 1466144965, "nanos": 666092188 }, "nonce": "G3Uw47NsaYSArVIqPdvGoQCXFQJVgUo+", "cert": "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", "signature": "MEUCIQDUysHHpfTD9Eiw/LDOBLHnWnUJSSFOSq8wiLae3rCI5QIgcMU8OgED2+2HOCQ8exIbMSfYMIwR2jKxggoysUJChQo=" }

I don't know how to get the transaction data from the payload hash, could you tell me how to get the real value of this paload?

Thanks in advance.

Regards Harry

[mastersingh24]

@huhaiqing - the chaincodeID and payload are base64 encoded so any base64 decoding library will work


51151a034267b95efefdd8c36dde0129a1a3108e8305370badaabdf80acc76309adcdc5548afaf11a0c378a1ce62e7a4e3baaa43106f95a36a42c62a379c2d08





51151a034267b95efefdd8c36dde0129a1a3108e8305370badaabdf80acc76309adcdc5548afaf11a0c378a1ce62e7a4e3baaa43106f95a36a42c62a379c2d08> add_loan_creditlaowang19872016-12-01 loan from ABC 50000

[JiZiJian]

@mastersingh24 This sample is OK for just using base64 decoding, but if you set CORE_SECURITY_PRIVACY=true, then the payload will be encrypted like below, can't just use base64 decoding, do you know how to decrypt it? "transactions": [ { "type": 2, "chaincodeID": "BOT0Gws+NQrhIV9bsAz1j9Ae+mePggCxY/jypT7kOV1s+FtQ74WkW59bzSDHNmY5lmizcHhCLzaNj7fkD4xQ8Rdj2vKU0h4XqnrYpDIWyDSMVmsuQLiJD3JV0fTkBRM3ng+99xUBk5uVP7FFiRYKI0QxW0/Z5lQ=", "payload": "BBFFhuRoDtlNvU0SI0YKwPH+gpQXHAVE/AJ4Xn8BYZwN6NsN49uwytrMMM3u+O9Wk4G36XKqjUBgXeL9uyFxTnXNmzTkB4GUGRB51Mn9QI0GvXUDFFsq9KEMGjsCNaQzWe/TxoMoIWAY5CiNcxISv87QX+Fgi17LW5BQUdt5xnLnDZrj6X+WRMyAu/KyDtTa+9Fr", "uuid": "e0a8029c-61b9-492a-a1b6-2ccaceb3aa40", "timestamp": { "seconds": 1469425541, "nanos": 461776071 }, "confidentialityLevel": 1, "confidentialityProtocolVersion": "1.2", "nonce": "PysQ3yVJadZgpr9XOE022RcFO9b/RJBE", "toValidators": "BPiR/rQbaD43Lxqz13v4GLsOpzcCxrMBIrUvvu19ZO3XK/nD7B87NDpov+HU+p4Ac6xKDuu3tHsH3KOYZypRnsNL+eMO9fTbsQdRpydUxJXlrWrt2nwNGVPpw+o3IZG7fF/ne+OAlVkkmh48/J13lBel9JWThA/4tZVUvg3ZsEXagv1yX4/pNrw8zYubyftjnUJ30167lRGoB6wytzYKkHcskg4dhT5xegqR33wIh/lGUulj81D+4H9a5QYNKSEUngq0aOC1Yku4BOtIQn/NqGlm2mAlAgxOt674mxRS7+/g+kxxOOTbcVDHEeQ6iavA", "cert": "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", "signature": "MEQCIBR0TQxubzRBjc2WTih2eyTWGHOlkd4g8dIsYZHUaVKOAiA32VWdkwvTPTtc5GG6jKau+ZtNXyg0L9+GOtPJ7ZdY3Q==" } ],

[iiiLiQuiDiii]

I also have a question about decoding the payload : there are some characters which don't get decoded properly. ������� what are those?

[JiZiJian]

@iiiLiQuiDiii the payload message is firstly encoded by protobuf and then encoded by base64 , so after decoded by base64, you need to decode it using protobuf to get the original payload message, here is the protobuf definition file https://github.com/hyperledger/fabric/blob/232346ba60a3b0d3a4022c8da9e6d07a870f4441/protos/fabric.proto