Description

A Decentralized Real-Estate Crowdfunding platform based on MANTRA blockchain that allows users to own fractionalized parts of real-estate properties using a variety of options, not limited to NFTs, Crpto etc.

Smart Contract Deployment

Guide to deploying a basic smart contract on the MANTRA Hongbai testnet

User intervention required

WSL Recommeneded

STEP1 : Install Rust

curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh Select Options

rustup default stable

cargo version

STEP2: Add wasm target

rustup target add wasm32-unknown-unknown

STEP3: Install cargo-generate package

cargo install cargo-generate --features vendored-openssl cargo install cargo-run-script

STEP4: Get boilerplate code ready

Specify your project name in place of <PROJECT_NAME>

cargo generate --git https://github.com/CosmWasm/cw-template.git --name <PROJECT_NAME>

cd <PROJECT_NAME>

STEP5: Run the test Command to confirm the installation cargo generate --git https://github.com/CosmWasm/cw-template.git --name first-token

cd ./first-token

#NANO Navigation and Commands #Ctrl+X to save #Enter Y to confirm #Press enter to save and exit

#Paste the following after editing the file using nano

#File 1

#[dependencies] #cw20-base = { version = "0.13.2", features =["library"] }

nano Cargo.toml

#File 2

#use schemars::JsonSchema; #use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)] #pub struct MigrateMsg {}

nano src/msg.rs

#File 3

#pub mod contract; #pub mod msg;

nano src/lib.rs

#File 4

Paste following code into contract.rs using 'nano'

#[cfg(not(feature = "library"))] #use cosmwasm_std::entry_point; #use cosmwasm_std::{ to_binary, Binary, Deps, DepsMut, Env, MessageInfo, Response, StdResult, }; #use cw20_base::ContractError; #use cw20_base::enumerable::{query_all_allowances, query_all_accounts}; #use cw20_base::msg::{QueryMsg,ExecuteMsg};

#use crate::msg::MigrateMsg; #use cw2::set_contract_version; #use cw20_base::allowances::{ execute_decrease_allowance, execute_increase_allowance, execute_send_from, execute_transfer_from, query_allowance, execute_burn_from, }; #use cw20_base::contract::{ execute_mint, execute_send, execute_transfer, execute_update_marketing, execute_upload_logo, query_balance, query_token_info, query_minter, query_download_logo, query_marketing_info, execute_burn, };

// version info for migration info #const CONTRACT_NAME: &str = "crates.io:cw20-token"; #const CONTRACT_VERSION: &str = env!("CARGO_PKG_VERSION");

#[cfg_attr(not(feature = "library"), entry_point)] #pub fn instantiate( deps: DepsMut, env: Env, info: MessageInfo, msg: cw20_base::msg::InstantiateMsg, ) -> Result<Response, ContractError> { set_contract_version(deps.storage, CONTRACT_NAME, CONTRACT_VERSION)?;

/* Execute the instantiate method from cw_20_base as the code from that
library is already battle tested we do not have to re-write the full
functionality: https://github.com/CosmWasm/cw-plus/tree/main/contracts/cw20-base*/
Ok(cw20_base::contract::instantiate(deps, env, info, msg)?)

}

#[cfg_attr(not(feature = "library"), entry_point)] #pub fn execute( deps: DepsMut, env: Env, info: MessageInfo, msg: ExecuteMsg, ) -> Result<Response, cw20_base::ContractError> { match msg { ExecuteMsg::Transfer { recipient, amount } => { execute_transfer(deps, env, info, recipient, amount) } ExecuteMsg::Burn { amount } => execute_burn(deps, env, info, amount), ExecuteMsg::Send { contract, amount, msg, } => execute_send(deps, env, info, contract, amount, msg), ExecuteMsg::Mint { recipient, amount } => execute_mint(deps, env, info, recipient, amount), ExecuteMsg::IncreaseAllowance { spender, amount, expires, } => execute_increase_allowance(deps, env, info, spender, amount, expires), ExecuteMsg::DecreaseAllowance { spender, amount, expires, } => execute_decrease_allowance(deps, env, info, spender, amount, expires), ExecuteMsg::TransferFrom { owner, recipient, amount, } => execute_transfer_from(deps, env, info, owner, recipient, amount), ExecuteMsg::BurnFrom { owner, amount } => execute_burn_from(deps, env, info, owner, amount), ExecuteMsg::SendFrom { owner, contract, amount, msg, } => execute_send_from(deps, env, info, owner, contract, amount, msg), ExecuteMsg::UpdateMarketing { project, description, marketing, } => execute_update_marketing(deps, env, info, project, description, marketing), ExecuteMsg::UploadLogo(logo) => execute_upload_logo(deps, env, info, logo), } }

#[cfg_attr(not(feature = "library"), entry_point)] #pub fn query(deps: Deps, _env: Env, msg: QueryMsg) -> StdResult { match msg { /* Default methods from CW20 Standard with no modifications: https://github.com/CosmWasm/cw-plus/tree/main/contracts/cw20-base */ QueryMsg::Balance { address } => to_binary(&query_balance(deps, address)?), QueryMsg::TokenInfo {} => to_binary(&query_token_info(deps)?), QueryMsg::Minter {} => to_binary(&query_minter(deps)?), QueryMsg::Allowance { owner, spender } => { to_binary(&query_allowance(deps, owner, spender)?) } QueryMsg::AllAllowances { owner, start_after, limit, } => to_binary(&query_all_allowances(deps, owner, start_after, limit)?), QueryMsg::AllAccounts { start_after, limit } => { to_binary(&query_all_accounts(deps, start_after, limit)?) } QueryMsg::MarketingInfo {} => to_binary(&query_marketing_info(deps)?), QueryMsg::DownloadLogo {} => to_binary(&query_download_logo(deps)?), } }

#[cfg_attr(not(feature = "library"), entry_point)] #pub fn migrate(_deps: DepsMut, _env: Env, _msg: MigrateMsg) -> StdResult { Ok(Response::default()) }

nano src/contract.rs

#STEP5 : Download Pre-requisite

#Move up directory to root #cd ../../

#CosmWasm Library #sudo wget -P /usr/lib https://github.com/CosmWasm/wasmvm/releases/download/v1.3.0/libwasmvm.x86_64.so

#Mantra CLI #Download CLI curl -LO https://github.com/MANTRA-Finance/public/raw/main/mantrachain-testnet/mantrachaind-linux-amd64.zip #UnZIP CLI unzip mantrachaind-linux-amd64.zip

#Test command mantrachaind

#Global Declaration sudo mv mantrachaind /usr/bin

#STEP6: Setting up enviornment

#Paste following into mantrachaind-cli.env using nano

export CHAIN_ID="mantra-hongbai-1" export TESTNET_NAME="mantra-hongbai" export FEE_DENOM="uom" export STAKE_DENOM="uom" export BECH32_HRP="wasm" export WASMD_VERSION="v0.27.0" export CONFIG_DIR=".mantrachaind" export BINARY="mantrachaind"

export COSMJS_VERSION="v0.28.1" export GENESIS_URL="https:///config/genesis.json"

export RPC="https://rpc.hongbai.mantrachain.io:443" export FAUCET="https://faucet.hongbai.mantrachain.io"

export NODE=(--node $RPC) export TXFLAG=($NODE --chain-id $CHAIN_ID --gas-prices 0.25uom --gas auto --gas-adjustment 1.3)

nano mantrachaind-cli.env

source mantrachaind-cli.env

#Setup Wallets

mantrachaind keys add wallet mantrachaind keys add wallet2

#Request testnet tokens #Faucet https://faucet.hongbai.mantrachain.io/

#Use above created wallet addresses

#Downloading and Compiling a Smart Contract

#Setting up Contract

Download the repository

git clone https://github.com/InterWasm/cw-contracts cd cw-contracts git checkout main cd contracts/nameservice

compile the wasm contract with stable toolchain

rustup default stable cargo wasm

#Setting up Docker #Not necessary, but is preferred to reduce gas costs 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:0.12.11

#Deploying and Interacting with the Smart Contract #Relatively small code, may wotk #Sure shot code

#See list of codes uploaded to the network mantrachaind query wasm list-code --node https://rpc.hongbai.mantrachain.io:443