Users interact with ETH6900 the same way they would with any Ethereum RPC, by signing transactions locally in their wallet. ETH6900 only handles already-signed data, never private keys or assets. This ensures the protocol remains trustless, permissionless, and censorship resistant.

Non-Custodial by Design

• User retains full control: Transactions are signed in the wallet (MetaMask, Rabby, WalletConnect) before ETH6900 ever touches them.

• No private key exposure: ETH6900 only sees the signed payload; it cannot modify, cancel, or re-sign transactions.

• No fund custody: ETH6900 never holds ETH, tokens, or assets — it only relays tx data to the chain.

This means even if ETH6900 servers were compromised, user assets remain safe, because private keys never leave the user’s device.

Permissionless Access

ETH6900 is built for open participation — any user, developer, or protocol can access the system without approvals.

• Anyone can add the RPC to their wallet.

• Anyone can query the API endpoints.

• Anyone can route their dApp through ETH6900’s relay.

There are no gatekeepers, no “KYC walls,” no pay-to-play barriers. ETH6900 follows Ethereum’s ethos: open to all, owned by none.

Transaction Flow (Step by Step)

1. User signs transaction in their wallet.

2. Signed transaction is submitted to ETH6900 RPC.

3. ETH6900 queues & optimizes the transaction based on deadlines and gas forecasts.

4. ETH6900 forwards the exact signed tx to the blockchain.

5. User receives confirmation directly from the chain.

At no point can ETH6900 alter:

• The recipient address.

• The transaction amount.

• The contract call data.

Technical Safeguards

• Immutable Payloads → ETH6900 cannot change signed bytes; it either broadcasts them or drops them (if user cancels before execution).

• Nonce Management → ensures transaction ordering is respected, preventing accidental overwrites.

• Deadline Enforcement → ETH6900 respects the max validity set by the user, never holding tx beyond that.

{
  "status": "queued",
  "txHash": "0x...",
  "deadline": "2025-10-03T15:30Z",
  "canCancel": true,
  "canReplace": true
}

Why This Matters

In a space crowded with semi-custodial “helpers” that ask for permissions or proxy user funds, ETH6900 stands apart:

• Users don’t have to trust a middleman with their money.

• Developers don’t need to worry about regulatory bottlenecks caused by custodial designs.

• Communities can integrate ETH6900 knowing it aligns with Ethereum’s decentralized ethos.