Step 3 · Fund Wallet 0

Wallet 0 holds the bundle's entire budget before distribution. You fund it once — the engine does the rest.

How

In Setup → step 3, pick the source chain your ETH lives on:

• Base (8453)
• Ethereum (1)
• Arbitrum (42161)

Click Show address to copy wallet 0's address, send your chosen amount Y from any wallet or exchange withdrawal, then Check balance. The app reads the live balance over that chain's public RPC — not a guess, not a mock.

What Y means

Y is the total ETH the bundle will deploy: distribution to the other wallets + the opening buy + gas. Whatever arrives in wallet 0 is what the plan divides in step 4 — there is no top-up later unless you send more.

Gate

Step 3 completes when the source-chain balance reads above zero. While it is empty, the pipeline shows pending and launch stays locked — the server-side gate blocks /api/launch regardless of what the UI says.

API

POST /api/source-balance with {chain: 8453} returns:

{"address": "0x…", "chain": 8453, "chain_name": "Base", "eth": 1.234}