Transfer Request URL Params

The TransferRequestURLParams input dictionary accepted by encode_url contains:

Field	Type	Required
`recipient`	`PublicKey \| str`	Yes
`amount`	`Decimal \| int \| float \| str`	No
`spl_token`	`PublicKey \| str`	No
`reference`	`Sequence[PublicKey \| str] \| PublicKey \| str`	No
`label`	`str`	No
`message`	`str`	No
`memo`	`str`	No

For native SOL, amount is denominated in SOL and may contain at most nine decimal places. With spl_token, it is denominated in that mint’s user unit.

parse_url returns an immutable TransferRequestURL dataclass. Its amount is Decimal | None, key fields are PublicKey, and reference is always a list.