dev.cocore.account.tokenGrant

Records that an exchange has issued its one-time signup token grant to a recipient DID. Written by the exchange to its own PDS on the first balance event for a given DID — receipt as either side, top-up, or admission check. Issued exactly once per (exchange, recipient) pair. A consumer reconstructing balances offline starts each DID at this grant amount; absence of a tokenGrant record means the DID has never interacted with the exchange.