Create chain-upgrade.md

networks/testnets/fairytest-3/chain-upgrade.md

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+# Chain Reset and Upgrade to fairyring v0.3.0
+
+This is the instruction for performing chain reset and then upgrading the chain from v0.2.1 to v0.3.0
+
+## Upgrading to fairyring v0.3.0
+
+1. Move to your fairyring folder, then pull the latest version
+
+```bash
+cd fairyring
+git pull
+git checkout v0.3.0
+```
+
+2. Install the new version
+
+make sure you have go version 1.21 installed
+
+`make install`
+
+## Resetting the chain
+
+1. Resetting the chain
+
+`fairyringd tendermint unsafe-reset-all
+
+**If your .fairyring directory is not the default one, please add --home [path] flag
+
+2. Update Genesis file
+
+Replace the `.fairyring/config/genesis.json` with the [new one](https://github.com/Fairblock/fairyring/blob/main/networks/testnets/fairytest-3/genesis.json)
+
+## Start the chain
+
+fairyringd start
+
+**If your .fairyring directory is not the default one, please add --home [path] flag`