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lesson_5.md

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Goal:

  • Learners should understand how to create and query balances
  • Learners should know how to query in general

Lesson 5: Making a query through CLI

Guidelines

Query helps you to query information on chain or for debugging

Use "babyd q bank balances --help" to learn more

Useful flags

  • --output (-o): Output format (text|json) (default "text")
  • --node: : to Tendermint RPC interface for this chain (default "tcp://localhost:26657")
  1. bank
  • babyd q bank balances {} --node tcp://0.0.0.0:2281
  • babyd q bank balances {} --node tcp://0.0.0.0:2281 -o json
  1. tx
  • babyd q tx {} --node tcp://0.0.0.0:2281

Using json output in script

  1. babyd q bank balances {} --node tcp://0.0.0.0:2281 -o json | jq ".balances[0]"
    • jq is a favourite tool for handling json

Help videos

https://youtu.be/iC1Ca5JFnx4

Homework

  1. create a new key "test1"
  2. make a bank send transaction from key "test" to "test1"

res1

  1. query tx of that bank transaction and get raw_log

res2

  1. query balances of "test1" to make sure that it has received funds

res3

  1. query all validators babyd q staking validators --node tcp://localhost:2281