Optimize

In this section we will optimize the compiled smart contract Wasm to a deployable file.

A rust optimization tool was developed by the CosmWasm team to reduce the size of smart contract Wasm. It is packaged as a docker image. To use this image, add the following to the end of the tutorial Makefile.

plain text
.PHONY: optimize
optimize:
	@if [ "$(UNAME_M)" = "arm64" ]; then \\
		image="cosmwasm/optimizer-arm64"; \\
	else \\
		image="cosmwasm/optimizer"; \\
	fi; \\
	docker run --rm -v $(CURDIR)/../../:/code:Z --workdir /code/contracts/name \\
		--mount type=volume,source=name_cache,target=/code/target \\
		--mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \\
		$$image:0.16.0

Then build the optimized Wasm

shell
make optimize

There should now be an artifacts directory with the following contents

shell
ls -lh artifacts/tutorial.wasm

-rw-r--r--. 1 user user 170K Jan 20 01:39 artifacts/tutorial.wasm

The optimized Wasm file should be significantly smaller than the original.

shell
ls -lh target/wasm32-unknown-unknown/release/tutorial.wasm

-rwxr-xr-x. 2 user user 1.9M Jan 20 01:23 target/wasm32-unknown-unknown/release/tutorial.wasm

NOTE: Optimized smart contract size must be smaller than 600K

This concludes Part 1 of the tutorial. The optimized smart contract Wasm is ready to deploy to the Provenance Blockchain.

Up Next

Proceed to the Setup section to begin Part 2 of the tutorial.