Backer

Testnet Demo

The contract is live on bombay testnet! contract address - terra1rzy6g86xpysmkchcxw3ht6f6ch8hzg28v0r7tp

To create a project navigate to the "Contracts" section in "station.terra.money". Find the contract with search bar using the address and click on the "Interact" button.

{
	"create_project": {
		"title": "backer",
		"description": "decentralized crowd funding!",
		"funding_requested": 1000000,
		"denom": "uluna",
		"legal_contract": "",
		"lockup_period": 0,
		"thumbnail": ""
	}
}

Add this to the field to create a project.

Then navigate to "History" -> "Execute create_project" and get project_id of the project you created.

Go back to the "Contracts" page and click the "Query" button to query the project

{
	"get_project": {
		"id": 0 // the project_id
	}
}

This should return the project details

To back the project click on the "Interact" button and run the command.

{
	"back_project": {
		"id": 0, // project_id
		"amount": 1000000
	}
}

Make sure you send 1 luna along with your transaction so that the contract can send the tokens to the pool. It should be the field under the msg field.

Querying the project again should show you updated information.

Demo

Create a directory just for this project - will refer to it as "home" directory.

Clone the backer repository into the home directory

git clone git@github.com:TommyToken/fansquad.git
cd fansquad
git checkout cosmwasm

Install terrad and setup accounts

You will need to install terrad-v0.5.6-oracle

Run these commands from the "home" directory

git clone git@github.com:terra-money/core.git
cd core
git checkout v0.5.6-oracle
make install

This should install the correct terrad version.

Next you will need to create 2 accounts - one for the pool and another to interact with the smart contract

Run these commands

echo "cabin undo always radar expand hidden crack tiny waste trouble enroll foster defy shrimp dentist effort chuckle domain ceiling three drop amateur around easy" | terrad keys add pool --recover
echo "satisfy adjust timber high purchase tuition stool faith fine install that you unaware feed domain license impose boss human eager hat rent enjoy dawn" | terrad keys add user1 --recover

The account "pool" will have zero balance while "user1" account has some existing balance since its a special account

Run terra network locally

To test our smart contract we need to add the contract to the blockchain. Adding it to the testnet is overly complicated. A simpler way would be to run the terra network locally.

Open up a seperate terminal, go to the "home" directory and run these commands

git clone git@github.com:terra-money/LocalTerra.git
cd LocalTerra
docker-compose up

Upload and initialize smart contract

Now from the backer repository run these commands!

cargo artifacts
terrad tx wasm store artifacts/backer.wasm --from user1 --chain-id=localterra --gas=auto --fees=100000uluna --broadcast-mode=block

You should get an output like this

code: 0
codespace: ""
data: 0A260A202F74657272612E7761736D2E763162657461312E4D736753746F7265436F646512020803
gas_used: "808974"
gas_wanted: "810495"
height: "855"
info: ""
logs:
- events:
  - attributes:
    - key: action
      value: /terra.wasm.v1beta1.MsgStoreCode
    - key: module
      value: wasm
    type: message
  - attributes:
    - key: sender
      value: terra1dcegyrekltswvyy0xy69ydgxn9x8x32zdtapd8
    - key: code_id
      value: "3"
    type: store_code
  log: ""
  msg_index: 0
raw_log: '[{"events":[{"type":"message","attributes":[{"key":"action","value":"/terra.wasm.v1beta1.MsgStoreCode"},{"key":"module","value":"wasm"}]},{"type":"store_code","attributes":[{"key":"sender","value":"terra1dcegyrekltswvyy0xy69ydgxn9x8x32zdtapd8"},{"key":"code_id","value":"3"}]}]}]'
timestamp: ""
tx: null
txhash: 823A3836CCEEB2B81256CAFAE7CF1A1AF21484561F4009B469E5CBBF6A7EFAA0

For me the "code_id" value is 3, it could be different for you. We have uploaded the contract now we need to initialize it.

Run these commands. Make sure to use the correct code_id!

terrad tx wasm instantiate 3 '{"pool":"terra13nfhuh80ppf5lqsrafdnlw9n9mxrpg3rzf6wk9"}' --from user1 --chain-id=localterra --fees=10000uluna --gas=auto --broadcast-mode=block

Interact with the contract

We will now create a new project. Note the contract address frorm the previous command - mine was "terra19zpyd046u4swqpksr3n44cej4j8pg6ah2y6dcg". Run the command with proper contract address!

terrad tx wasm execute terra19zpyd046u4swqpksr3n44cej4j8pg6ah2y6dcg '{"create_project":{"title":"backer","description":"decentralized crowd funding!","funding_requested":1000000,"denom":"uusd","legal_contract":"","lockup_period":0,"thumbnail":""}}' --from user1 --chain-id=localterra --fees=1000000uluna --gas=auto --broadcast-mode=block

Note the project_id - mine is "0".

Congrats you created a project! Lets query to get project details!

terrad query wasm contract-store terra1pcknsatx5ceyfu6zvtmz3yr8auumzrdts4ax4a '{"get_project":{"id":0}}'

You should see something like this!

query_result:
  denom: uusd
  description: decentralized crowd funding!
  funding_raised: []
  funding_requested: 1e+06
  id: 0
  legal_contract: ""
  lockup_period: 0
  thumbnail: ""
  title: backer

Lets back the project!

terrad tx wasm execute terra1pcknsatx5ceyfu6zvtmz3yr8auumzrdts4ax4a '{"back_project":{"id":0,"amount":1200}}' 1201uusd --from user1 --chain-id=localterra --fees=34000uusd --broadcast-mode=block

Backed the project with 1200 uusd

Lets get the project info again!

query_result:
  denom: uusd
  description: decentralized crowd funding!
  funding_raised:
  - - terra1dcegyrekltswvyy0xy69ydgxn9x8x32zdtapd8
    - 1200
  funding_requested: 1e+06
  id: 0
  legal_contract: ""
  lockup_period: 0
  thumbnail: ""
  title: backer

The funding raised section is showing that account with address terra1dcegyrekltswvyy0xy69ydgxn9x8x32zdtapd8 has backed the project with 1200 uusd