The quote's identity or organization, or with no quote its ledger account's.
Null on a DEPOSIT swap not yet priced.
Each side's token symbol: its b2b.token's, else the stored currency.
b2b.token
Each receipt signature's Solana transaction, by signature.
A DEPOSIT swap's deposited token symbol; null on an ACCOUNT swap.
The quote's identity or organization, or with no quote its ledger account's.