Cosmos SDK v0.45.0 Release Candidate 1

Release Notes

Cosmos SDK v0.45.0 is a logical continuation of the v0.44.* series, but brings a couple of state- and API-breaking changes requested by the community.

State-Breaking Changes

There are few important changes in gas consumption , which improve the gas economics:

• We now charge gas in two new places: on `.Seek()` even if there are no entries, and for the key length (on top of the value length).

• When block gas limit is exceeded, we consume the maximum gas possible (to charge for the performed computation). We also fixed the bug when the last transaction in a block exceeds the block gas limit, it returns an error result, but the tx is actually committed successfully.

Finally, a small improvement in gov, we increased the maximum proposal description size from 5k characters to 10k characters.

API-Breaking Changes

• The `BankKeeper` interface has a new `HasSupply` method to ensure that input denom actually exists on chain.

• The `CommitMultiStore` interface contains a new `SetIAVLCacheSize` method for a configurable IAVL cache size.

• `AuthKeeper` interface in `x/auth` now includes a function `HasAccount`.

Finally, when using the `SetOrder*` functions in simapp, e.g. `SetOrderBeginBlocker`, we now require that all modules be present in the function arguments, or else the node panics at startup. We also added a new `SetOrderMigration` function to set the order of running module migrations.

Improvements

• Speedup improvements (e.g. speedup iterator creation after delete heavy workloads, lower allocations for `Coins.String()`, reduce RAM/CPU usage inside store/cachekv's `Store.Write`) are included in this release.

• Upgrade Rosetta to v0.7.0 .

• Support in-place migration ordering.

See our CHANGELOG for the exhaustive list of all changes, or a full commit diff .