cosmos升级

cosmosupgrade_00.png

cosmosupgrade_01.png

Verify you are currently running the correct version (v0.34.6+) of the Cosmos SDK:

$ gaiad version --long
cosmos-sdk: 0.34.6
git commit: 80234baf91a15dd9a7df8dca38677b66b8d148c1
vendor hash: f60176672270c09455c01e9d880079ba36130df4f5cd89df58b6701f50b13aad
build tags: netgo ledger
go version go1.12.2 linux/amd64

Export existing state from cosmoshub-2:

NOTE: It is recommended for validators and operators to take a full data snapshot at the export
height before proceeding in case the upgrade does not go as planned or if not enough voting power
comes online in a sufficient and agreed upon amount of time. In such a case, the chain will fallback
to continue operating cosmoshub-2. See Recovery for details on how to proceed.

Before exporting state via the following command, the gaiad binary must be stopped!
```
$ gaiad export --for-zero-height --height=2902000 > cosmoshub_2_genesis_export.json
```

Verify the SHA256 of the (sorted) exported genesis file:

$ jq -S -c -M '' cosmoshub_2_genesis_export.json | shasum -a 256
[PLACEHOLDER]  cosmoshub_2_genesis_export.json

At this point you now have a valid exported genesis state! All further steps now require
v2.0.3 of Gaia.

NOTE: Go 1.13+ is required!
```
$ git clone https://github.com/cosmos/gaia.git && cd gaia && git checkout v2.0.3; make install
```

Verify you are currently running the correct version (v2.0.3) of the Gaia:

$ gaiad version --long
name: gaia
server_name: gaiad
client_name: gaiacli
version: 2.0.3
commit: 2f6783e298f25ff4e12cb84549777053ab88749a
build_tags: netgo,ledger
go: go version go1.13.3 darwin/amd64

Migrate exported state from the current v0.34.6+ version to the new v2.0.3 version:
```
$ gaiad migrate v0.36 cosmoshub_2_genesis_export.json --chain-id=cosmoshub-3 --genesis-time=[PLACEHOLDER]> genesis.json
```
NOTE: The migrate command takes an input genesis state and migrates it to a targeted version.
Both v0.36 and v0.37 are compatible as far as state structure is concerned.

Genesis time should be computed relative to the blocktime of 2,902,000. The genesis time
shall be the blocktime of 2,902,000 + 60 minutes with the subseconds truncated.

An example shell command(tested on OS X Mojave) to compute this values is:
```
curl https://stargate.cosmos.network:26657/block\?height\=2902000 | jq -r '.result["block_meta"]["header"]["time"]'|xargs -0 date -v +60M  -j  -f "%Y-%m-%dT%H:%M:%S" +"%Y-%m-%dT%H:%M:%SZ"
```
Now we must update all parameters that have been agreed upon through governance. There is only a
single parameter, max_validators, that we're upgrading based on proposal 10
```
$ cat genesis.json | jq '.app_state["staking"]["params"]["max_validators"]=125' > tmp_genesis.json && mv tmp_genesis.json genesis.json
```

Verify the SHA256 of the final genesis JSON:

$ jq -S -c -M '' genesis.json | shasum -a 256
[PLACEHOLDER]  genesis.json

Reset state:

NOTE: Be sure you have a complete backed up state of your node before proceeding with this step.
See Recovery for details on how to proceed.
```
$ gaiad unsafe-reset-all
```
Move the new genesis.json to your .gaiad/config/ directory
Replace the db_backend on .gaiad/config/config.toml to:
```
db_backend = "goleveldb"
```
Note, if you have any application configuration in gaiad.toml, that file has now been renamed to app.toml:
```
$ mv .gaiad/config/gaiad.toml .gaiad/config/app.toml
```