Mukan Erkin Törük
26b204bd04
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45 lines
1.6 KiB
Markdown
45 lines
1.6 KiB
Markdown
---
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sidebar_position: 4
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description: Test different scenarios after the blockchain is created.
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---
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# Genesis overwrites for development
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The `genesis.json` file for all new blockchains is automatically created from the `config.yml` file to define the initial state upon genesis of the blockchain.
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In development environments, it is useful to test different scenarios after the blockchain is created. The `genesis.json` file for the blockchain is overwritten by the top-level `genesis` parameter in `config.yml`.
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To set and test different values, add the `genesis` parameter to `config.yml`.
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## Change the value of a single parameter
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To change the value of one parameter, add the key-value pair under the `genesis` parameter. For example, change the value of `chain-id`:
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```yaml
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genesis:
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chain_id: "foobar"
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```
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## Change values in modules
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You can change one or more parameters of different modules. For example, in the `staking` module you can add a key-value pair to `bond_denom` to change which token gets staked:
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```yaml
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genesis:
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app_state:
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staking:
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params:
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bond_denom: "denom"
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```
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## Genesis file
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For genesis file details and field definitions, see Cosmos Hub documentation for the [Genesis File](https://hub.cosmos.network/main/resources/genesis).
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## Genesis block summary
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- The genesis block is the first block of a blockchain.
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- The `genesis.json` file for the blockchain is overwritten by the top-level genesis parameter in `config.yml`.
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- After the blockchain is created, add the `genesis` parameter and key-value pairs to set and test different values in your development environment.
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