yoink

Yoink Play Yoink, an onchain capture-the-flag game on Base. Yoink the flag from the current holder to start your clock. The player with the most total yoinks holds the trophy. Contract: 0x4bBFD120d9f352A0BEd7a014bd67913a2007a878 on Base (chain ID 8453) Game Rules Yoink the flag - Call yoink() to take the flag from the current holder Cooldown - You must wait 10 minutes (600 seconds) between yoinks No self-yoink - You cannot yoink from yourself Accumulate time - While you hold the flag, your time score increases Compete for trophy - The player with the most total yoinks holds the trophy (token ID 2) Track yoinks - Your total yoink count is tracked separately from time Contract Interface RPC template: curl -s -X POST https://mainnet.base.org -H "Content-Type: application/json" \ -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x4bBFD120d9f352A0BEd7a014bd67913a2007a878","data":"SELECTOR+PARAMS"},"latest"],"id":1}' | jq -r '.result' Function Selector Params Returns yoink() 0x9846cd9e - (write) lastYoinkedBy() 0xd4dbf9f4 - address lastYoinkedAt() 0x6a99616f - uint256 timestamp totalYoinks() 0xa5d0dadd - uint256 topYoinker() 0x6a974e6e - address (trophy holder) mostYoinks() 0xd2d7774a - uint256 (record) COOLDOWN() 0xa2724a4d - uint256 (600) score(address) 0x776f3843 addr (32B padded) (yoinks, time, lastYoinkedAt) balanceOf(address,uint256) 0x00fdd58e addr + tokenId uint256 (FLAG_ID=1, TROPHY_ID=2) Encoding: Addresses are zero-padded to 32 bytes. score() returns 96 bytes (3 × uint256). Yoinking Use Bankr's arbitrary transaction feature: { "to": "0x4bBFD120d9f352A0BEd7a014bd67913a2007a878", "data": "0x9846cd9e", "value": "0", "chainId": 8453 } Errors Error Selector Meaning SlowDown(uint256) 0x58d6f4c6 Cooldown not elapsed. Param = seconds remaining. Unauthorized() 0x82b42900 You already hold the flag. Cooldown check: current_time - lastYoinkedAt() >= 600 Workflow Query lastYoinkedBy() and lastYoinkedAt() to check status/cooldown Ensure cooldown elapsed (600s) and you're not current holder Submit yoink transaction via Bankr Verify with lastYoinkedBy() or score(address) Resources Basescan: https://basescan.org/address/0x4bBFD120d9f352A0BEd7a014bd67913a2007a878 (ABI, events, source) Source Code: https://github.com/horsefacts/yoink-contracts