Interactive Learning Experience
Proof of Effort
Journey through the complete lifecycle of an ERC-20 token
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Core Functions
Master the ERC-20 Standard
balanceOf()
Learn how tokens track ownership by checking your EFFORT balance in real-time.
transfer()
Send tokens directly to other addresses and understand the transfer mechanics.
approve()
Master the approval pattern - the foundation of DeFi interactions.
Curriculum
What You'll Learn
How ERC-20 tokens track balances
Why approvals are necessary for DeFi
The difference between transfer and transferFrom
How allowances work and when to use them
Best practices for token interactions
Reading and understanding smart contracts
Progression
Earn Your Way to Master
Newcomer0+ EFFORT
Learner50+ EFFORT
Scholar200+ EFFORT
Expert500+ EFFORT
Master1000+ EFFORT
On-Chain
Explore the Smart Contracts
View our verified smart contracts on OP Sepolia Etherscan, including ERC-8004 agent identity registries.
ERC-8004
Effort AI Agent Registries
On-chain identity, reputation, and validation for the Effort AI agent.
Deployed on OP Sepolia