Smart contracts can be programmed on the Stateset Network using CosmWasm. Cosmwasm is a smart contract framework that leverages Rust.

To create the smart contract:

  • Generate the initial project
  • Compile the smart contract
  • Run unit tests
  • Optimize the wasm contract bytecode to prepare for deployment
  • Deploy the smart contract to local Stateset Network
  • Instantiate it with contract parameters

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The cw20 basic token

Once you have the Stateset Network running on your local machine it should be very easy to create your own token. Here is a quick introduction into creating an interacting with an erc20 like token on Stateset.

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Download

We’re going to grab the stateset-contracts repo and compile our chosen contract.

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Get the Code

bash
git clone https://github.com/stateset/stateset-contracts
cd stateset-contracts
cd contracts/cw20

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Compile

We can compile our contract like so:

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Compile the wasm contract with stable toolchain

bash
rustup default stable
cargo wasm

However, we want to create an optimized version to limit gas usage, so we’re going to run:

bash
sudo docker run --rm -v "$(pwd)":/code \
    --mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target \
    --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
    cosmwasm/rust-optimizer:0.12.6

This will result in an artifact called cw_erc20.wasm being created in the artifacts directory.

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Upload

bash
statesetd tx wasm store cw_erc20.wasm --from dom --chain-id=stateset --gas-prices 0.1ustate --gas auto --gas-adjustment 1.3 -b block -y

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Optimize the Contract

bash
sudo docker run --rm -v "$(pwd)":/code \
    --mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target \
    --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
    cosmwasm/rust-optimizer:0.12.6

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Instantiate

bash
statesetd tx wasm inst 1 '{"name":"Token","symbol":"TOKEN","decimals":6,"initial_balances":[{"address":"stateset1mz337yp22zxje75f5gw2mfupems5cx3p2p2pax","amount":"2800000000"}]}' --label "token" --from dom --chain-id stateset --gas auto --gas-adjustment 1.3 -b block -y

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Query - Query Balances

bash
statesetd query wasm contract-state smart stateset1yyca08xqdgvjz0psg56z67ejh9xms6l436u8y58m82npdqqhmmtqr9zaus '{"balance":{"address":"stateset1mz337yp22zxje75f5gw2mfupems5cx3p2p2pax"}}' --chain-id stateset

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Execute - Transfer Tokens

bash
statesetd tx wasm execute stateset1yyca08xqdgvjz0psg56z67ejh9xms6l436u8y58m82npdqqhmmtqr9zaus '{"transfer":{"amount":"2000","owner":"stateset1mz337yp22zxje75f5gw2mfupems5cx3p2p2pax","recipient":"stateset1j57jhj3t6322sm8lwsnxcme8af8yrghp8jf9k7"}}' --from dom --chain-id stateset --gas auto --gas-adjustment 1.3 -b block -y
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