Add wasm-opt to build

Makefile

@@ -104,6 +104,9 @@ fmt-connect:
 wasm:
 	RUSTFLAGS='-C link-arg=-s' cargo build --manifest-path contracts/Cargo.toml --release --target wasm32-unknown-unknown
 
+mixnet-opt: wasm
+	cd contracts/mixnet && make opt
+
 generate-typescript:
 	cd tools/ts-rs-cli && cargo run && cd ../..
 	yarn types:lint:fix

contracts/mixnet/Cargo.toml

@@ -37,4 +37,4 @@ rand_chacha = "0.2"
 crypto = { path = "../../common/crypto", features = ["asymmetric", "rand"] }
 
 [build-dependencies]
-vergen = { version = "5", default-features = false, features = ["build", "git", "rustc"] }
+vergen = { version = "5", default-features = false, features = ["build", "git", "rustc"] }

contracts/mixnet/README.md

@@ -8,6 +8,16 @@ This is the [cosmwasm](https://www.cosmwasm.com) smart contract which runs the N
 RUSTFLAGS='-C link-arg=-s' cargo wasm
 ```
 
+## Production build
+
+Install wasm-opt:
+
+```
+npm i wasm-opt -g
+```
+
+Run `make mixnet-opt` from the top level Nym directory
+
 ## CI Support
 
 We have template configurations for both [GitHub Actions](.github/workflows/Basic.yml)