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Peer Chaincode Postscript

docs/wrappers/peer_chaincode_postscript.md

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Example Usage

peer chaincode invoke example

Here is an example of the peer chaincode invoke command:

  • Invoke the chaincode named mycc at version 1.0 on channel mychannel on peer0.org1.example.com:7051 and peer0.org2.example.com:9051 (the peers defined by --peerAddresses), requesting to move 10 units from variable a to variable b:

    peer chaincode invoke -o orderer.example.com:7050 -C mychannel -n mycc --peerAddresses peer0.org1.example.com:7051 --peerAddresses peer0.org2.example.com:9051 -c '{"Args":["invoke","a","b","10"]}'

2018-02-22 16:34:27.069 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 001 Using default escc
2018-02-22 16:34:27.069 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 002 Using default vscc
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2018-02-22 16:34:27.106 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> DEBU 00a ESCC invoke result: version:1 response:<status:200 message:"OK" > payload:"\n \237mM\376? [\214\002 \332\204\035\275q\227\2132A\n\204&\2106\037W|\346#\3413\274\022Y\nE\022\024\n\004lscc\022\014\n\n\n\004mycc\022\002\010\003\022-\n\004mycc\022%\n\007\n\001a\022\002\010\003\n\007\n\001b\022\002\010\003\032\007\n\001a\032\00290\032\010\n\001b\032\003210\032\003\010\310\001\"\013\022\004mycc\032\0031.0" endorsement:<endorser:"\n\007Org1MSP\022\262\006-----BEGIN CERTIFICATE-----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\nAiAlQffq2JFlbh6OWURGOko6RckizG8oVOldZG/Xj3C8lA==\n-----END CERTIFICATE-----\n" signature:"0D\002 \022_\342\350\344\231G&\237\n\244\375\302J\220l\302\345\210\335D\250y\253P\0214:\221e\332@\002 \000\254\361\224\247\210\214L\277\370\222\213\217\301\r\341v\227\265\277\336\256^\217\336\005y*\321\023\025\367" >
2018-02-22 16:34:27.107 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 00b Chaincode invoke successful. result: status:200
2018-02-22 16:34:27.107 UTC [main] main -> INFO 00c Exiting.....

    Here you can see that the invoke was submitted successfully based on the log message:

    2018-02-22 16:34:27.107 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 00b Chaincode invoke successful. result: status:200

    A successful response indicates that the transaction was submitted for ordering successfully. The transaction will then be added to a block and, finally, validated or invalidated by each peer on the channel.

Here is an example of how to format the peer chaincode invoke command when the chaincode package includes multiple smart contracts.

  • If you are using the contract-api, the name you pass to super("MyContract") can be used as a prefix.

    peer chaincode invoke -C $CHANNEL_NAME -n $CHAINCODE_NAME -c '{ "Args": ["MyContract:methodName", "{}"] }'

peer chaincode invoke -C $CHANNEL_NAME -n $CHAINCODE_NAME -c '{ "Args": ["MyOtherContract:methodName", "{}"] }'

peer chaincode query example

Here is an example of the peer chaincode query command, which queries the peer ledger for the chaincode named mycc at version 1.0 for the value of variable a:

  • You can see from the output that variable a had a value of 90 at the time of the query.

    peer chaincode query -C mychannel -n mycc -c '{"Args":["query","a"]}'

2018-02-22 16:34:30.816 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 001 Using default escc
2018-02-22 16:34:30.816 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 002 Using default vscc
Query Result: 90

<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"></a> This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.