Pre-Send Proof Receipt

After a paid guard succeeds, Nishvault should leave the builder with a compact receipt they can point to before launch: the agent did not blind-send; it ran one paid preflight on Base mainnet first.

PRE_SEND_PROOF_RECEIPT
product=Nishvault Blind-Send Risk Guard
category=Agent Transaction Safety / Pre-Send Guard
network=eip155:8453
price=$0.01
real_usdc=true
tx_shape=from,to,data,value,chainId
receipt_status=paid_guard_required
settlement_tx=created_after_paid_request
seller_wallet_credit_expected=true
success_signal=external_mainnet_paid_request

networkeip155:8453

price$0.01

real_usdctrue

tx shapefrom/to/data/value/chainId

statusreceipt_status

settlementsettlement_tx

wallet creditseller_wallet_credit_expected

final signalexternal_mainnet_paid_request

Generate one

npx --package nishvault-preflight-buy nishvault-guard-tx -- --seller-url https://api.nishvault.com --to 0x2222222222222222222222222222222222222222 --data 0x --value 0x0

This page is intentionally narrow: one receipt, one Base mainnet guard, one launch gate before sendTransaction. The first external successful receipt becomes the proof slot on /first-real-buyer.

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