Help with Streams Create

Question

Hello - I am working with streams and want to know if a sample code can be available on how to use the custom fields options during stream creation. If you could also highlight possible usages of these fields .

: 

create

type=stream name open ({"custom-field-1":"x",...})

 

 

Thanks

Answer 1

Here's an example of how to use it:

create stream stream1 true '{"key1":"value1","key2","value2"}'

Comments

Hi, i'm having trouble with curl command for creating streams with custom fields, I think its because of the single and double quotes.

please correct command below:

not working: curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false, "{\"register_num\"=\"1\",\"transnum\"=\"22\"}"] }' -H 'content-type: text/plain;' http://127.0.0.1:9262

not working: curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false, "'{\"register_num\"=\"1\",\"transnum\"=\"22\"}'"] }' -H 'content-type: text/plain;' http://127.0.0.1:9262

not working: curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false, "\'{\"register_num\"=\"1\",\"transnum\"=\"22\"}\'"] }' -H 'content-type: text/plain;' http://127.0.0.1:9262

not working:
curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false, "{register_num=1,transnum=22}"] }' -H 'content-type: text/plain;' http://127.0.0.1:9262

not working:
curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false, "'{register_num=1,transnum=22}'"] }' -H 'content-type: text/plain;' http://127.0.0.1:9262

it works without the custom fields:
curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false] }' -H 'content-type: text/plain;' http://127.0.0.1:9262

TIA

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You're sending a JSON payload in the API request, so you don't need further escaping. Try:

curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false, {"register_num":1,"transnum":22}] }' -H 'content-type: text/plain;' http://127.0.0.1:9262

In general you can always look at the first line output by multichain-cli to see the format of the JSON request to send.

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tried it with no avail. parse error

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Sorry, with MultiChain 1.0 you can only have textual custom fields for describing a stream. This worked for us:

curl --user multichainrpc:DgUzSVgbjgiyM9q6UxLVgKqVqaMgryxBJ5fP65QvZ1Y7 --data-binary '{"jsonrpc": "1.0", "id":"chain1", "method": "create", "params": ["stream", "stream_test", false, {"register_num":"1","transnum":"22"}] }' -H 'content-type: text/plain;' http://127.0.0.1:9262