Lib.rs

Cargo Features

[dependencies]
cosmwasm-vm = { version = "2.2.0-rc.3", default-features = false, features = ["iterator", "staking", "stargate", "dhat-heap", "cranelift"] }

default = iterator, staking

These default features are set whenever cosmwasm-vm is added without default-features = false somewhere in the dependency tree.

iterator default

iterator allows us to iterate over all DB items in a given range this must be enabled to support cosmwasm contracts compiled with the 'iterator' feature optional as some merkle stores (like tries) don't support this given Ethereum 1.0, 2.0, Substrate, and other major projects use Tries we keep this optional, to allow possible future integration (or different Cosmos Backends)

Enables iterator of cosmwasm-std

Affects backend::Storage.scan, backend::Storage.next, backend::Storage.next_value, backend::Storage.next_key, imports::do_db_scan, imports::do_db_next, imports::do_db_next_key, imports::do_db_next_value, memory::maybe_read_region…

staking default

Enables staking of cosmwasm-std

cosmwasm-std:

staking exposes bindings to a required staking moudle in the runtime, via new CosmosMsg types, and new QueryRequest types. This should only be enabled on contracts that require these types, so other contracts can be used on systems with eg. PoA consensus

stargate

this enables all stargate-related functionality, including the ibc entry points

Enables stargate of cosmwasm-std

Affects calls::call_ibc_channel_open, calls::call_ibc_channel_connect, calls::call_ibc_channel_close, calls::call_ibc_packet_receive, calls::call_ibc_packet_ack, calls::call_ibc_packet_timeout, calls::call_ibc_channel_open_raw, calls::call_ibc_channel_connect_raw, calls::call_ibc_channel_close_raw, calls::call_ibc_packet_receive_raw, calls::call_ibc_packet_ack_raw, calls::call_ibc_packet_timeout_raw, calls::ibc_channel_open, calls::ibc_channel_connect, calls::ibc_channel_close, calls::ibc_packet_receive…

dhat-heap

For heap profiling. Only used in the "heap_profiling" example.

Enables dhat

For heap profiling. Only used in the "heap_profiling" example. This has to be a non-dev dependency because cargo currently does not support optional dev-dependencies.

cranelift

Legacy no-op feature. This is kept for compatibility with older contracts.
Delete this with the next major release.