98 lines
2.9 KiB
Markdown
98 lines
2.9 KiB
Markdown
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order: 5
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# Upgrade Node
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Learn how to upgrade your full node to the latest software version {synopsis}
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## Software Upgrade
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These instructions are for full nodes that have ran on previous versions of and would like to upgrade to the latest testnet.
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First, stop your instance of `ethermintd`. Next, upgrade the software:
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```bash
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cd ethermint
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git fetch --all && git checkout <new_version>
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make install
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```
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::: tip
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If you have issues at this step, please check that you have the latest stable version of GO installed.
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:::
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You will need to ensure that the version installed matches the one needed for th testnet. Check the Ethermint [release page](https://github.com/tharsis/ethermint/releases) for details on each release.
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## Upgrade Genesis File
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:::warning
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If the new version you are upgrading to has breaking changes, you will have to restart your chain. If it is **not** breaking, you can skip to [Restart](#restart-node).
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:::
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To upgrade the genesis file, you can either fetch it from a trusted source or export it locally using the `ethermintd export` command.
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### Fetch from a Trusted Source
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If you are joining an existing testnet, you can fetch the genesis from the appropriate testnet source/repository where the genesis file is hosted.
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Save the new genesis as `new_genesis.json`. Then, replace the old `genesis.json` with `new_genesis.json`.
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```bash
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cd $HOME/.ethermintd/config
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cp -f genesis.json new_genesis.json
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mv new_genesis.json genesis.json
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```
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Finally, go to the [reset data](./run_node.md#reset-data) section.
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### Export State
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Ethermint can dump the entire application state to a JSON file. This, besides upgrades, can be
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useful for manual analysis of the state at a given height.
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Export state with:
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```bash
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ethermintd export > new_genesis.json
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```
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You can also export state from a particular height (at the end of processing the block of that height):
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```bash
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ethermintd export --height [height] > new_genesis.json
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```
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If you plan to start a new network for 0 height (i.e genesis) from the exported state, export with the `--for-zero-height` flag:
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```bash
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ethermintd export --height [height] --for-zero-height > new_genesis.json
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```
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Then, replace the old `genesis.json` with `new_genesis.json`.
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```bash
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cp -f genesis.json new_genesis.json
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mv new_genesis.json genesis.json
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```
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At this point, you might want to run a script to update the exported genesis into a genesis state that is compatible with your new version.
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You can use the `migrate` command to migrate from a given version to the next one (eg: `v0.X.X` to `v1.X.X`):
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```bash
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ethermintd migrate [target-version] [/path/to/genesis.json] --chain-id=<new_chain_id> --genesis-time=<yyyy-mm-ddThh:mm:ssZ>
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```
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## Restart Node
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To restart your node once the new genesis has been updated, use the `start` command:
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```bash
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ethermintd start
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```
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## Next {hide}
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Learn about how to setup a [validator](./validator-setup.md) node on Ethermint {hide}
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