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About the role: As the blockchain lead at Heera Digital, you will lead the development team in the integration of web3 tooling and libraries, as well as perform smart contract development. You will develop new features, as well as create and integrate our utility token and DAO.
Responsibilities:
- Lead web3 integration of our app
- Create on-chain indexers for EVM-based NFT contracts
- Write and test smart contracts
- Manage web3 tooling, providers, APIs
Must haves:
- Minimum 2 years experience using: React, TypeScript
- Experience with Ethers or similar libraries
- Experience working with node providers (ex. Alchemy, Infura, Covalent, etc.)
- Strong ability to write smart contracts in Solidity
- Experience with ERC-20, ERC-721, and ERC-1155 tokens
- Prior development on other EVM chains (Polygon, Avalanche, etc.)
- Able to write automated tests
- Write maintainable, high-quality code and documentation
- Proactive and self-guided, able to work in a fast-paced environment
- Strong communication skills
- High empathy and emotional intelligence
Nice to haves:
- Experience setting up DAOs
- Experience developing with non-EVM chains
- Experience with Geth or Golang
Perks & benefits:
- Fully remote possible
- Flexible hours
- Competitive rates
- Equity/token allocation
Heera Digital focuses on SaaS, Digital Rights Management, Cryptocurrency, Blockchains, and Blockchain / Cryptocurrency. Their company has offices in Austin, Santa Monica, and Calgary. They have a small team that's between 1-10 employees.
You can view their website at https://www.heera.digital
What is ERC20 example?
ERC20 is a standard for fungible tokens on the Ethereum blockchain
Here is an example of an ERC20 token
Let's say we create a new ERC20 token called ABC Token with a total supply of 1,000,000 tokens
Each token will be divisible up to 18 decimal places
To implement the ERC20 standard, we will need to define several functions, including:
- balanceOf(address): Returns the token balance of a specific address.
- transfer(address to, uint256 value): Transfers tokens from the caller's address to the specified address.
- approve(address spender, uint256 value): Approves a specific address to spend a certain amount of tokens on behalf of the caller.
- allowance(address owner, address spender): Returns the amount of tokens approved by the owner that the spender can transfer.
- User1 owns 500,000 ABC Tokens.
- User2 wants to buy 100 ABC Tokens from User1.
- User1 approves User2 to spend up to 100 ABC Tokens on her behalf.
- User2 calls the transferFrom() function with User1's address, his own address, and the value of 100 tokens.
- The transferFrom() function deducts 100 tokens from User1's balance and adds them to User2's balance.