chain: add SubmitPackage API for atomic parents+child relay #1009
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bhandras
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This commit introduces first-class support for Bitcoin Core's `submitpackage` RPC (v26+), allowing btcwallet users to broadcast (potentially zero‑fee) unconfirmed parent txns together with its (fee‑paying) child in one call.
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Change Description
This commit introduces first-class support for Bitcoin Core's
submitpackageRPC (v26+), allowing btcwallet users to broadcast (potentially zero‑fee) parent txns together with their (fee‑paying) child txn in one call.Depends on: btcsuite/btcd#2366
Steps to Test
N/A
Pull Request Checklist
Testing
Code Style and Documentation
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