This repository contains a sample implementation of a CW20 token contract for the CosmWasm smart contract platform. CW20 is a specification for fungible tokens similar to ERC20 on Ethereum, allowing for token creation, transfer, and balance tracking within the Cosmos ecosystem.
- Minting: Allows the creation of new tokens.
- Burning: Tokens can be destroyed, reducing the total supply.
- Transfer: Users can send tokens to other addresses.
- Allowance: Provides the ability to approve other addresses to spend tokens on your behalf.
- Querying: Users can query balances, total supply, and allowances.
Rust and Cargo for building the contract.
- Clone the Repository
git clone https://github.com/MANTRA-Finance/first_token_cw20contract.git
cd first_token_cw20contract- Build the Contract
docker run --rm -v "$(pwd)":/code \
--mount type=volume,source="$(basename "$(pwd)")_cache",target=/target \
--mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
cosmwasm/optimizer:0.16.0Or if you are on MacOS:
docker run --rm -v "$(pwd)":/code \
--mount type=volume,source="$(basename "$(pwd)")_cache",target=/target \
--mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
cosmwasm/optimizer-arm64:0.16.0- Deploy the Contract
mantrachaind tx wasm store artifacts/first_token_cw20contract.wasm --from <wallet> --node https://rpc.hongbai.mantrachain.io:443 --chain-id mantra-hongbai-1 --gas-prices 0.35uom --gas auto --gas-adjustment 1.4 -y --output json- Instantiate the Contract
MSG='{
"name": "MANTRACW20",
"symbol": "MNTRA",
"decimals": 6,
"initial_balances": [
{
"address": "", // add your address here
"amount": "10000000"
}
]
}'
mantrachaind tx wasm instantiate <code_id> "$MSG" --from <wallet> --node https://rpc.hongbai.mantrachain.io:443 --chain-id mantra-hongbai-1 --label "MANTRAcw20" --no-admin --gas-prices 0.35uom --gas auto --gas-adjustment 1.4 -y --output json