rwa_multichain.unit_conversions records time-versioned conversion multipliers between token, display, and share units. Grain: one row per chain-native conversion update, keyed on (blockchain, unique_key). The shared multichain contract contains Solana Token-2022 rows.
Use this table when the amount shown to a user differs from the raw token-unit balance. Solana rows use Token-2022 ScaledUiAmountConfig; the shared schema also supports rebase indexes, share conversions, and interest accrual.