fix(wallet): added the validation of previous tx outputs for get_psbt_input

[ItshMoh]

Description

It is fixing the issue bitcoindevkit/bdk_wallet#50 . This PR is adding validation of previous tx outputs. we would be checking the size of the prev_tx.output vector.

Notes to the reviewers

Here i have checked the size of the prev_tx.output vector. I have also added an error type of "InvalidVoutIndex"

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing

Bugfixes:

• This pull request breaks the existing API
• I've added tests to reproduce the issue which are now passing
• I'm linking the issue being fixed by this PR

[ValuedMammal]

Note that adding the enum variant would constitute a major semver change, but there should be a way to reuse an error from rust-miniscript, for example UtxoUpdateError.

[ItshMoh]

Note that adding the enum variant would constitute a major semver change, but there should be a way to reuse an error from rust-miniscript, for example UtxoUpdateError.

hey @ValuedMammal As per your suggestion i have updated the error variant . I have found IndexOutOfBounds error variant in UtxoUpdateError i have used that.
Now it is ready for review.

[ItshMoh]

Hey @ValuedMammal updated as you have suggested.

[luisschwab]

Hey @ItshMoh, this PR needs to be closed and moved to the new bdk_wallet repo. Here's how:

1. From your Github account, fork https://github.com/bitcoindevkit/bdk_wallet
2. From your local system bdk repo folder, push your PR changes to your bdk_wallet fork on Github:

   git checkout <PR branch path>
   git push [email protected]:<username>/bdk_wallet.git
   

3. Clone to your forked bdk_wallet repo to your local system and switch to your PR branch:

   git clone [email protected]:<username>/bdk_wallet.git
   cd bdk_wallet
   git fetch origin <PR branch path>
   git checkout -b <PR branch path> FETCH_HEAD
   git rebase master
   

4. Resolve rebase conflicts (if any)
5. Force push your PR branch: git push origin -f
6. Create new PR in bitcoindevkit/bdk_wallet repo from your fork branch
7. Copy/paste title and description from your original bdk PR and add a link back to it in your new PR.
8. Close original PR with comment that includes link to new PR.