Upstream sync

Nanvil is a fork of nspcc-dev/neo-go.

Sync procedure

1. Add upstream remote: git remote add upstream https://github.com/nspcc-dev/neo-go.git
   
2. Fetch: git fetch upstream
   
3. Merge or rebase: git merge upstream/master
   
4. Resolve conflicts in patched files:
   
   • pkg/core/interop/runtime/witness.go
     
   • pkg/core/blockchain.go (verifyTxWitnesses)
     
   • pkg/services/rpcsrv/register.go, server.go
     
   • pkg/config/application_config.go, nanvil_config.go
     
5. Run tests: go test ./pkg/nanvil/... ./integration/...
   
6. Run neo-go suite selectively if needed: go test ./pkg/core/... -count=1 -short
   

Patch policy

Prefer extending pkg/nanvil/ over modifying core. Core patches should remain dev-mode gated.