Correct syntax for liststreamkeyitems count=

Question

Hello!

In terminal, I'm trying to list all stream items on training1Stream on chain training1Chain from key 1522442947163\t1\t88213\t79821\t1\tFILE_ACCESS\tTOPMed to that key plus some count. I've tried 

multichain-cli training1Chain liststreamkeyitems training1Stream '1522442947163\t1\t88213\t79821\t1\tFILE_ACCESS\tTOPMed' count=1

as well as

multichain-cli training1Chain liststreamkeyitems training1Stream '1522442947163\t1\t88213\t79821\t1\tFILE_ACCESS\tTOPMed' '["count=1"]'

and

multichain-cli training1Chain liststreamkeyitems training1Stream '1522442947163\t1\t88213\t79821\t1\tFILE_ACCESS\tTOPMed' "count=1"

As well as just about every other variation of single quotes and double quotes and brackets. Can someone help me out with the syntax?

 

With '["count=1"]' I've gotten the following error:

error code: -8

error message:

Invalid parameter value type, should be boolean

 

With all of the other ones, I get an 'error parsing JSON' error.

 

Thank you!

 

Answer 1

You just need to pass the value for the count parameter, not the word count itself. So:

multichain-cli training1Chain liststreamkeyitems training1Stream '1522442947163\t1\t88213\t79821\t1\tFILE_ACCESS\tTOPMed' false 1

(This is assuming that the long string with tabs in it is really your key name - I would suggest using underscores or hyphens instead of tabs to make life easier for yourself.)

Comments

I just got the same error:

[meg98@idrac multichain-1.0.4]$ multichain-cli training1Chain liststreamkeyitems training1Stream '1522442947163\t1\t88213\t79821\t1\tFILE_ACCESS\tTOPMed' 1

{"method":"liststreamkeyitems","params":["training1Stream","1522442947163\t1\t88213\t79821\t1\tFILE_ACCESS\tTOPMed",1],"id":1,"chain_name":"training1Chain"}

error code: -8
error message:
Invalid parameter value type, should be boolean

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Oops - my apologies - there's a verbose parameter before the count. The answer above has been corrected.

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Thank you for being patient with me.. Unfortunately, changing the number following the boolean (True/False) isn't doing anything. I just keep getting the same transaction over and over again. Do I have a fundamental misunderstanding of what 'count' does? I'm wanting it to list all stream items starting from the key I provided up until the count.

Alternatively, if there's a way to list all stream items between two stream items (by their keys) then that will also work perfectly as well.

Thank you.

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The 'count' parameter controls how many items to return, out of those which have that key. So I think you may not be understanding it correctly.

If you want to list all stream items between two items, you should use liststreamblockitems with a block range based on the blocks containing those two items, then you can extract the exact range what is returned. There's not currently  a more direct way to do it than that.