Transaction Signature

find_reference returns the standard RPC TransactionSignature model.

Attribute	Type
`signature`	`str`
`slot`	`int`
`err`	RPC error data or `None`
`memo`	`str \| None`
`block_time`	`int \| None`
`confirmation_status`	`"processed" \| "confirmed" \| "finalized" \| None`
`raw`	Original RPC dictionary