Architecture

Mini Blocks

Mini blocks are emitted around every 10ms, enabling fast receipt availability and realtime subscription UX.

~10ms

mini block interval

~1s

EVM block interval

Realtime

state visibility

Subscription Types

Type	Payload	Expected latency
miniBlocks	Mini block object with tx/receipt context	<1ms
newHeads	EVM block headers	~block cadence
pendingTransactions	Sequencer mempool hashes	<0.5ms

Keep-Alive Example

subscribe.tsts

const ws = new WebSocket("wss://rpc.megaeth.com");

setInterval(() => {
ws.send(JSON.stringify({ jsonrpc: "2.0", id: 0, method: "eth_chainId", params: [] }));
}, 30000);

ws.send(JSON.stringify({
jsonrpc: "2.0",
id: 1,
method: "eth_subscribe",
params: ["miniBlocks"],
}));

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