Paste a hex or base64 encoded PSBT. PSBTv0 will be converted to v2.

What is Bip370?

This document proposes a second version of the Partially Signed Bitcoin Transaction format described in BIP 174 which allows for inputs and outputs to be added to the PSBT after creation.

Partially Signed Bitcoin Transaction Version 0 as described in BIP 174 is unable to have new inputs and outputs be added to the transaction. The fixed global unsigned transaction cannot be changed which prevents any additional inputs or outputs to be added. PSBT Version 2 is intended to rectify this problem.

An additional beneficial side effect is that all information for a given input or output will be provided by its <input-map> or <output-map>. With Version 0, to retrieve all of the information for an input or output, data would need to be found in two locations: the <input-map>/<output-map> and the global unsigned transaction. PSBT Version 2 now moves all related information to one place.

Source: https://bips.xyz/370