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Version: 0.16

Setting Up Environment

You need an environment to run contracts. You can either run your node locally or connect to an existing network. For easy testing, the pebblenet testnet is live. You can use this to deploy and run your contracts. If you want to setup and run against a local blockchain, follow these instructions.

To verify the testnet is currently running, make sure the following URLs are all working for you:

TODO: add deus labs

We have set up two native tokens - STAR (ustar) for becoming a validator and SPONGE (upebble) for paying fees. Available frontends:

You can use these to explore txs, addresses, validators and contracts. Feel free to deploy one pointing to our rpc/lcd servers and we will list it.

When interacting with this network, you can either use wasmd which is a Go client, or the Node REPL. The Node REPL is recommended for contract operations, since JSON manipulation is not intuitive with the Shell/Go client.

Setup Go CLI

Let's configure the wasmd executable, point it to the testnet, create a wallet and ask for tokens from faucet:

First source the uni network configuration in the shell:

source <(curl -sSL

Setup the client:

# add wallets for testing
wasmd keys add wallet
"name": "wallet",
"type": "local",
"address": "wasm13nt9rxj7v2ly096hm8qsyfjzg5pr7vn5saqd50",
"pubkey": "wasmpub1addwnpepqf4n9afaefugnfztg7udk50duwr4n8p7pwcjlm9tuumtlux5vud6qvfgp9g",
"mnemonic": "hobby bunker rotate piano satoshi planet network verify else market spring toward pledge turkey tip slim word jaguar congress thumb flag project chalk inspire"

wasmd keys add wallet2

You need some tokens in your address to interact. If you are using local node you can skip this step. Requesting tokens from faucet:

JSON=$(jq -n --arg addr $(wasmd keys show -a wallet) '{"denom":"upebble","address":$addr}') && curl -X POST --header "Content-Type: application/json" --data "$JSON"
JSON=$(jq -n --arg addr $(wasmd keys show -a wallet2) '{"denom":"upebble","address":$addr}') && curl -X POST --header
"Content-Type: application/json" --data "$JSON"

Export wasmd Parameters

If you intend to use wasmd as client, we recommend you to setup these variables. Otherwise You will have to define type in node, chain id and gas-prices details with every command you execute. Also for this tutorial we will use these variables. So make sure you export these before proceeding.

# bash
export NODE="--node $RPC"
export TXFLAG="${NODE} --chain-id ${CHAIN_ID} --gas-prices 0.001upebble --gas auto --gas-adjustment 1.3"

# zsh
export NODE=(--node $RPC)
export TXFLAG=($NODE --chain-id $CHAIN_ID --gas-prices 0.001upebble --gas auto --gas-adjustment 1.3)

If any of the commands above throws an error, this means your shell is different. If the command succeeded, then try running:

wasmd query bank total $NODE

Beyond the standard CLI tooling, we have also produced a flexible TypeScript library CosmJS, which runs in Node.js as well as in modern browsers. It handles queries and submitting transactions. Along with this library, we produced @cosmjs/cli, which is a super-charged Node console. It supports await, does type checking for helpful error messages, and preloads many CosmJS utilities. If you are comfortable with the Node console, you will probably find this easier and more powerful than the CLI tooling.

Using the REPL:

// Create or load account
const mnemonic = loadOrCreateMnemonic('fred.key')

const {address, client} = await connect(mnemonic, {})

// if empty - this only works with CosmWasm
hitFaucet(defaultFaucetUrl, address, 'STAR')