Add support for "origin" field

[0xJem]

The STS API has an optional "origin" field that can be used to display the purpose of a transaction alongside the contract call in the Safe UI.

Source: https://docs.safe.global/core-api/transaction-service-reference/mainnet#Create-Multisig-Transaction

It would be great if we could specify this!

[aviggiano]

Hey, thanks for the interest in this library.
I'm not familiar with this service, nor with the origin field. Can you give some detail about how this would be used, and if possible what would need to change on the safe-utils SDK to support this? I believe it would be just an additional parameter calling the API, right?

[0xJem]

The Safe Transaction Service (STS) is what you're using to propose transactions 😁

e.g. the URLs in Safe.initialize() all point to it, and the reference doc that I shared has the same URL (for mainnet)