Adding burn contract. (#585)

## 1. Overview

In this PR we are adding Burn contract that will burn the token sent to
it.

## 2. Implementation details

The Burn Coins Contract is a simple smart contract designed to burn the
coins sent to it. Here are some highlights of the implementation:

- The contract consists of an `instantiate` function to initialize the
contract.
- It includes an `execute` function that has `burn` function to handle
the execution of coin burning.
- The contract allows to query the total amount of coins burnt using the
`query` function.

Design Rationale:
- The contract follows a straightforward design to achieve its primary
objective of burning coins.
- It ensures that burning coins is irreversible to maintain the
integrity of the tokenomics.

## 3. How to test/use

To test or use the Burn Coins Contract, follow these steps:
- Build the contract locally
- Change to demos directory
- Run `sh quasar_localnet.sh`
- Run `burn.sh`

## 4. Checklist

- [x] Does the Readme need to be updated?

## 5. Limitations (optional)

<!-- Describe any limitation of the capabilities listed in the Overview
section. -->

## 6. Future Work (optional)

Potential future enhancements for the Burn Coins Contract include:
- Implementing additional functionality for managing burnt coins, such
as tracking burnt amounts per user or token.
- Adding support for configurable burning parameters, such as burn fees
or burn rates.

---------

Co-authored-by: Laurens <32776056+LaurensKubat@users.noreply.github.com>

demos/burn_contract/burn.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+BINARY=quasarnoded
+CHAIN_ID="quasar"
+ACCOUNT_NAME="alice"
+ACCOUNT_ADDRESS="quasar1sqlsc5024sszglyh7pswk5hfpc5xtl77gqjwec"
+
+cd ../../smart-contracts
+
+#docker run --rm -v "$(pwd)":/code --mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry cosmwasm/workspace-optimizer:0.12.11
+
+RES=$($BINARY tx wasm store artifacts/burn_coins-aarch64.wasm --from $ACCOUNT_NAME --keyring-backend test -y -b block --output json --chain-id $CHAIN_ID --fees 10000uqsr --gas 7000000)
+CODE_ID=$(echo $RES | jq -r '.logs[0].events[-1].attributes[1].value')
+echo "Got airdrop CODE_ID = $CODE_ID"
+
+INIT='{}'
+
+echo "Deploying airdrop contract"
+OUT1=$($BINARY tx wasm instantiate $CODE_ID "{}" --from $ACCOUNT_NAME --keyring-backend test --label "burn coins contract" -b block -y --admin $ACCOUNT_ADDRESS --chain-id $CHAIN_ID --gas 7000000 --fees 10000uqsr)
+ADDR1=$($BINARY query wasm list-contract-by-code $CODE_ID --output json | jq -r '.contracts[0]')
+echo "Got address of burn coin contract = $ADDR1"
+
+quasarnoded q bank total
+
+echo "Should not fail"
+quasarnoded tx wasm execute $ADDR1 '{"burn":{}}' --from $ACCOUNT_NAME --keyring-backend test -y --output json --chain-id $CHAIN_ID --fees 10000uqsr --gas 7000000 -b block --amount 90000000000000000uqsr,200000000stake,20000token
+
+quasarnoded q wasm contract-state smart $ADDR1 '{"total_burnt_query":{}}'
+
+quasarnoded q bank total
+
+

demos/burn_contract/quasar_localnet.sh

@@ -0,0 +1,133 @@
+#!/bin/sh
+
+## This script helps to create a basic version of the quasar chain genesis file for development purposes.
+## However it will need some manual modifications before you start the chain to incorporate the custom fields.
+
+# Configure variables
+BINARY=quasarnoded
+HOME_QSR=$HOME/.quasarnode
+CHAIN_ID=quasar
+ALICE="edge victory hurry slight dog exit company bike hill erupt shield aspect turkey retreat stairs summer sadness crush absorb draft viable orphan chuckle exhibit"
+BOB="harvest ill mean warfare gospel slide tragic palace model excess surprise distance voyage change bus grant special artwork win width group dwarf today jar"
+USER_1="guard cream sadness conduct invite crumble clock pudding hole grit liar hotel maid produce squeeze return argue turtle know drive eight casino maze host"
+USER_2="fuel obscure melt april direct second usual hair leave hobby beef bacon solid drum used law mercy worry fat super must ritual bring faculty"
+
+ALICE_GENESIS_COINS=20000token,200000000stake,100000000000000000uqsr
+BOB_GENESIS_COINS=10000token,100000000stake,1000000000uqsr
+USER_1_GENESIS_COINS=10000000000stake,10000000000uqsr
+USER_2_GENESIS_COINS=10000000000stake,10000000000uqsr
+
+# Remove previous setup
+rm -rf $HOME_QSR
+
+$BINARY init $CHAIN_ID --chain-id $CHAIN_ID
+
+# Bootstrap the quasar local network with single node
+
+echo $ALICE  | $BINARY keys add alice --keyring-backend test --recover
+echo $BOB    | $BINARY keys add bob   --keyring-backend test --recover
+echo $USER_1 | $BINARY keys add user1 --keyring-backend test --recover
+echo $USER_2 | $BINARY keys add user2 --keyring-backend test --recover
+$BINARY add-genesis-account $($BINARY keys show alice --keyring-backend test -a) $ALICE_GENESIS_COINS
+$BINARY add-genesis-account $($BINARY keys show bob   --keyring-backend test -a) $BOB_GENESIS_COINS
+$BINARY add-genesis-account $($BINARY keys show user1 --keyring-backend test -a) $USER_1_GENESIS_COINS
+$BINARY add-genesis-account $($BINARY keys show user2 --keyring-backend test -a) $USER_2_GENESIS_COINS
+$BINARY gentx alice 100000000uqsr --chain-id $CHAIN_ID --keyring-backend test
+$BINARY collect-gentxs
+
+# Check platform
+platform='unknown'
+unamestr=`uname`
+if [ "$unamestr" = 'Linux' ]; then
+  platform='linux'
+elif [ "$unamestr" = 'Darwin' ]; then
+	platform='macos'
+fi
+
+if [ $platform = 'linux' ]; then
+	sed -i 's/enable = false/enable = true/g' $HOME_QSR/config/app.toml
+	sed -i 's/swagger = false/swagger = true/g' $HOME_QSR/config/app.toml
+	sed -i 's/minimum-gas-prices = ""/minimum-gas-prices = "0uqsr"/g' $HOME_QSR/config/app.toml
+  sed -i 's/query_gas_limit = 300000/query_gas_limit = 800000/g' $HOME_QSR/config/app.toml
+	sed -i 's+laddr = "tcp://127.0.0.1:26657"+laddr = "tcp://127.0.0.1:26659"+g' $HOME_QSR/config/config.toml
+	sed -i 's+node = "tcp://localhost:26657"+node = "tcp://localhost:26659"+g' $HOME_QSR/config/client.toml
+	sed -i 's+laddr = "tcp://0.0.0.0:26656"+laddr = "tcp://0.0.0.0:26661"+g' $HOME_QSR/config/config.toml
+	sed -i 's+pprof_laddr = "localhost:6060"+pprof_laddr = "localhost:6061"+g' $HOME_QSR/config/config.toml
+	sed -i 's+address = "0.0.0.0:9090"+address = "0.0.0.0:9095"+g' $HOME_QSR/config/app.toml
+	sed -i 's+address = "0.0.0.0:9091"+address = "0.0.0.0:8091"+g' $HOME_QSR/config/app.toml
+	sed -i 's+address = "tcp://0.0.0.0:1317"+address = "tcp://0.0.0.0:1311"+g' $HOME_QSR/config/app.toml
+	sed -i 's+address = ":8080"+address = ":8081"+g' $HOME_QSR/config/app.toml
+elif [ $platform = 'macos' ]; then
+	sed -i'.original' -e 's/enable = false/enable = true/g' $HOME_QSR/config/app.toml
+	sed -i'.original' -e 's/swagger = false/swagger = true/g' $HOME_QSR/config/app.toml
+	sed -i'.original' -e 's/query_gas_limit = 300000/query_gas_limit = 100000000/g' $HOME_QSR/config/app.toml
+	sed -i'.original' -e 's/minimum-gas-prices = ""/minimum-gas-prices = "0uatom"/g' $HOME_QSR/config/app.toml
+	sed -i'.original' -e 's+laddr = "tcp://127.0.0.1:26657"+laddr = "tcp://127.0.0.1:26659"+g' $HOME_QSR/config/config.toml
+	sed -i'.original' -e 's+node = "tcp://localhost:26657"+node = "tcp://localhost:26659"+g' $HOME_QSR/config/client.toml
+	sed -i'.original' -e 's+laddr = "tcp://0.0.0.0:26656"+laddr = "tcp://0.0.0.0:26661"+g' $HOME_QSR/config/config.toml
+	sed -i'.original' -e 's+pprof_laddr = "localhost:6060"+pprof_laddr = "localhost:6061"+g' $HOME_QSR/config/config.toml
+	sed -i'.original' -e 's+address = "0.0.0.0:9090"+address = "0.0.0.0:9095"+g' $HOME_QSR/config/app.toml
+	sed -i'.original' -e 's+address = "0.0.0.0:9091"+address = "0.0.0.0:8091"+g' $HOME_QSR/config/app.toml
+	sed -i'.original' -e 's+address = "tcp://0.0.0.0:1317"+address = "tcp://0.0.0.0:1311"+g' $HOME_QSR/config/app.toml
+	sed -i'.original' -e 's+address = ":8080"+address = ":8081"+g' $HOME_QSR/config/app.toml
+else
+	echo "only linux and macos platforms are supported, if you are using other platforms you should probably improve this script."
+
+	exit 1
+	sed -i '' 's/enable = false/enable = true/g' $HOME_QSR/config/app.toml
+	sed -i '' 's/swagger = false/swagger = true/g' $HOME_QSR/config/app.toml
+fi
+
+cp $HOME_QSR/config/genesis.json $HOME_QSR/config/genesis_original.json
+cat $HOME_QSR/config/genesis_original.json |
+  jq '.app_state.crisis.constant_fee.denom="uqsr"' |
+  jq '.app_state.staking.params.bond_denom="uqsr"' |
+  jq '.app_state.mint.params.mint_denom="uqsr"' |
+  jq '.app_state.gov.deposit_params.min_deposit=[{denom:"uqsr",amount:"1"}]' |
+  jq '.app_state.gov.voting_params.voting_period="60s"' |
+  jq '.app_state.gov.tally_params={quorum:"0.000000000000000001",threshold:"0.5",veto_threshold:"0.334"}' |
+  jq '.app_state.orion = {
+      "lpPosition": null,
+      "lpStat": null,
+      "params": {
+        "destination_chain_id": "osmosis",
+        "enabled": true,
+        "lp_epoch_id": "minute",
+        "mgmt_fee_per": "0.003000000000000000",
+        "osmosis_local_info": {
+          "chain_id": "osmosis",
+          "connection_id": "connection-1",
+          "local_zone_id": "osmosis-1"
+        },
+        "perf_fee_per": "0.020000000000000000",
+        "white_listed_pools": [
+          1,
+          2,
+          3
+        ]
+      },
+      "rewardCollection": null
+    }' |
+  jq '.app_state.qbank = {
+      "claimableRewards": [],
+      "depositInfos": [],
+      "params": {
+        "enabled": true,
+        "min_orion_epoch_denom_dollar_deposit": "100.000000000000000000",
+        "orion_epoch_identifier": "minute",
+        "white_listed_denoms_in_orion": [
+          {
+            "onehop_osmo": "ibc/BE1BB42D4BE3C30D50B68D7C41DB4DFCE9678E8EF8C539F6E6A9345048894FCC",
+            "onehop_quasar": "ibc/BE1BB42D4BE3C30D50B68D7C41DB4DFCE9678E8EF8C539F6E6A9345048894FCC",
+            "origin_name": "uatom"
+          }
+        ]
+      },
+      "totalClaimedRewards": [],
+      "totalDeposits": [],
+      "totalWithdraws": [],
+      "withdrawables": []
+    }' >  $HOME_QSR/config/genesis.json
+
+# Start
+$BINARY start --home $HOME_QSR >> ./logs/quasar_localnet.log 2>&1