Authorise where payments go
The vendor publishes a small file on its own domain naming its payout accounts and its settlement authority. Inside an enclave the Payee job fetches it; the authority approves on chain; the buyer accepts. A change needs all three again and a 24-hour delay.
1 · Generate the file
{
"accord": "1",
"network": "testnet",
"recipients": [
"halcyon-mm.testnet"
],
"settlement_authority": "halcyon-auth.testnet"
}2 · Check it
What it proves
Control of the domain when the file was fetched, and the authority account's approval. Not that the company legally exists: a legal KYB check is a later integration.
Signals
Whether the account exists, is a contract or changed its code recently, earlier payments from this buyer, refusal reports and the curated blocklist. A canary is always blocked.
Pinned domain
The first recipient sets the agreement's domain. Later changes must use it, so a stolen authority key cannot move payments to a domain the vendor does not control.