Question about the Vin

[cymqqqq]

Hi there, I found the VIn code in the rgb-core/src/contract/bundile.rs. v0.11: line 35 pub type Vin = Vout;
What's the definition of the Vin? Or how we can use it in our project? Any docs?
And I found BundleItem is deleted instead of TransitionBundle, which is composed of
pub struct TransitionBundle {
pub input_map: Confined<BTreeMap<Vin, OpId>, 1, U16>,
pub known_transitions: Confined<BTreeMap<OpId, Transition>, 1, U16>,
}
So what's the definition of the input_map?

[cymqqqq]

Like this?
"Vin" : [
{
"txid": "8adbca5e652c68f8f3c30ac658115bc4af395d0cc7e6beaea18168295c29d011",
"vout": 0,
"scriptSig": ""
}
]

[dr-orlovsky]

Vin means the ordinal number of some transaction input. It is just a u32 integer. It is defined that way since it is the same type int as Vout.

Your comment

Like this?
"Vin" : [
{
"txid": "8adbca5e652c68f8f3c30ac658115bc4af395d0cc7e6beaea18168295c29d011",
"vout": 0,
"scriptSig": ""
}
]

does not make any sense to me

So what's the definition of the input_map?

The definition of the input map is exactly given in the code:

  pub input_map: Confined<BTreeMap<Vin, OpId>, 1, U16>,