salman01zp / SubstrateTokens

Substrate main Node

Substrate Pallets

This is a project for learning exploring blockchain runtime development with Substrate and the FRAME. This project implements a simple substrate based pallets listed below

Crowdfunding Pallet Design Overview

Calls

This pallet defines a simple crowdfunding application interface throw which user can interact and contribute

• create(origin, beneficiary, goal, end)
• contribute(origin,index,value)
• withdraw(origin,index)
• dissolve(origin, index)
• dispense(origin, index)

Data Structure

pub struct FundInfo<AccountId, Balance, BlockNumber> {
  pub beneficiary:      AccountId,
  pub deposit:          Balance,
  pub raised:           Balance,
  pub end:              BlockNumber,
  pub goal:             Balance
}

type FundIndex = u32;
type AccountIdOf<T> = <T as frame_system::Config>::AccountId;
type BalanceOf<T> = << T as Config>::Currency as Currency<AccountIdOf<T>>>::Balance;
type FundInfoOf<T> = FundInfo<AccountIdOf<T>, BalanceOf<T>, <T as frame_system::Config>::BlockNumber>;

Storages

-funds: StorageMap FundIndex =>FundInfoOf

-fund_count: StorageValue => u32

Events

• Created(FundIndex, T::BlockNumber)
• Contributed(T::AccountId, FundIndex, BalanceOf<T>, T::BlockNumber)
• Withdrew(T::AccountId, FundIndex, BalanceOf<T>, T::BlockNumber)
• Retiring(FundIndex, T::BlockNumber)
• Dissolved(FundIndex, T::BlockNumber, T::AccountId)
• Dispensed(FundIndex, T::BlockNumber, T::AccountId)

Errors

• EndTooEarly
• ContributionTooSmall
• InvalidIndex
• ContributionPeriodOver
• FundStillActive
• NoContribution
• FundNotRetired
• UnsuccessfulFund

Token Pallet Design Overview

Calls

This pallet defines a simple token creation and transfer interface.

• initialize_token(origin_id)
• transfer_token(from_id,to_id,amt)

Storages

-Balances: StorageMap AccountId =>token_balance

-TotalSupply: StorageValue => u64

Events

• Initialized(AccountId)
• TokenTransfered(from_id, to_id , amount)

Errors

-AlreadyInitialized

-InsufficientFunds

-TokenOverflow

Build & Run

If you need to, set up your Substrate development environment. Then, build and run a development chain:

$ cargo run -- --dev --tmp

Once the node is running, use this link to open the Polkadot JS Apps UI and connect to the Substrate node: https://polkadot.js.org/apps/#/settings/developer?rpc=ws://127.0.0.1:9944. Use the Settings > Developer app and the contents of the types.json file to add the necessary types to the UI.

This project was forked from the Substrate Developer Hub Node Template.