SIGDA · onchain message

Write a message onto Robinhood Chain.

From your own wallet — OKX, Trust, MetaMask, Coinbase. No account, no SIGDA server. Open this page inside your wallet's browser, or use a desktop extension. Your message is recorded on Robinhood Chain as a readable event — it shows on Blockscout forever, and the chain proves you sent it.

This is a single static file. Host it anywhere (GitHub Pages, IPFS, your own domain) or open it in your wallet's built-in browser — it talks straight to the chain and never sees your key. Messages are recorded by the SignaMessages contract on Robinhood Chain via send(to, body), a Message(from, to, body) event. Pass the deployed contract address as ?contract=0x… — there is no baked-in default since the address is assigned at deploy time (see contracts/script/DeployMessages.s.sol). Sending costs a few cents of Robinhood Chain ETH for gas.