feat: upgrade to stellar protocol 27 (#549)

- Upgrade entire stack to Protocol 27: stellar-cli v27, soroban-sdk
27.0.0-rc.1, stellar-xdr 27.0.0, stellar-rpc-client 27.0.0
- Fix CI: update stellar/stellar-cli action to v27.0.0 in both build and
test jobs
- Remove admin-sep dependency for test fixtures; rewrite
hello_v1/hello_v2 fixtures with minimal inline upgrade logic
- Fix soroban-cli v27 breaking API changes

Author: zachfedor

.github/dependabot.yml

@@ -20,16 +20,6 @@ updates:
           - minor
           - patch
 
-  - package-ecosystem: "npm"
-    directory: "/npm"
-    schedule:
-      interval: "weekly"
-    groups:
-      npm-minor:
-        update-types:
-          - minor
-          - patch
-
   - package-ecosystem: "cargo"
     directory: "/"
     schedule:

.github/workflows/tests.yml

@@ -36,7 +36,7 @@ jobs:
       - uses: taiki-e/install-action@just
       - uses: taiki-e/install-action@nextest
       - uses: cargo-bins/cargo-binstall@main
-      - uses: stellar/stellar-cli@v26.0.0
+      - uses: stellar/stellar-cli@v27.0.0
       - uses: mozilla-actions/sccache-action@v0.0.10
       - run: just build
       - run: just build-cli-test-contracts
@@ -85,25 +85,42 @@ jobs:
       STELLAR_NETWORK_PASSPHRASE: "Standalone Network ; February 2017"
       STELLAR_ACCOUNT: default
       STELLAR_CONTRACT_ID: core
-    services:
-      rpc:
-        image: stellar/quickstart:testing
-        ports:
-          - 8000:8000
-        env:
-          ENABLE_LOGS: true
-          NETWORK: local
-          ENABLE_SOROBAN_RPC: true
-        options: >-
-          --health-cmd "curl --no-progress-meter --fail-with-body -X POST \"http://localhost:8000/soroban/rpc\" -H 'Content-Type: application/json' -d '{\"jsonrpc\":\"2.0\",\"id\":8675309,\"method\":\"getNetwork\"}' && curl --no-progress-meter \"http://localhost:8000/friendbot\" | grep '\"invalid_field\": \"addr\"'"
-          --health-interval 2s
-          --health-timeout 5s
-          --health-retries 50
     steps:
       - uses: actions/checkout@v6
       - uses: taiki-e/install-action@just
       - uses: taiki-e/install-action@nextest
-      - uses: stellar/stellar-cli@v26.0.0
+      - uses: stellar/stellar-cli@v27.0.0
+      # Start the local network through the CLI itself — the same path
+      # `stellar scaffold build` drives for users — so the suite validates the
+      # real plumbing. Without an explicit protocol, quickstart's local network
+      # arms its baked-in default (p25) and p27 contracts fail transaction
+      # simulation on deploy.
+      - name: Start local Stellar network
+        run: |
+          # Single source of truth: derive the protocol from the stellar-cli pin
+          # in Cargo.toml — the same value build.rs bakes into the CLI binary.
+          PROTOCOL_VERSION=$(sed -n 's/.*stellar-cli = .*version = "\([0-9]*\).*/\1/p' Cargo.toml | head -1)
+          if [ -z "$PROTOCOL_VERSION" ]; then
+            echo "Could not derive protocol version from stellar-cli pin in Cargo.toml" >&2
+            exit 1
+          fi
+          echo "Starting local network at protocol $PROTOCOL_VERSION"
+          stellar container start local --protocol-version "$PROTOCOL_VERSION"
+          echo "Waiting for RPC + friendbot to become healthy..."
+          for _ in $(seq 1 50); do
+            if curl --no-progress-meter --fail-with-body -X POST "http://localhost:8000/soroban/rpc" \
+                 -H 'Content-Type: application/json' \
+                 -d '{"jsonrpc":"2.0","id":8675309,"method":"getNetwork"}' >/dev/null 2>&1 \
+               && curl --no-progress-meter "http://localhost:8000/friendbot" 2>/dev/null \
+                 | grep -q '"invalid_field": "addr"'; then
+              echo "Local network healthy."
+              exit 0
+            fi
+            sleep 2
+          done
+          echo "Local network failed to become healthy in time." >&2
+          docker logs stellar --tail 100 || true
+          exit 1
       - name: Download nextest archive
         uses: actions/download-artifact@v8
         with:

CLAUDE.md

@@ -57,7 +57,6 @@ Clippy and warning flags are configured in `.cargo/config.toml` `rustflags` and
 
 ### Other directories
 
-- `npm/` — npm wrapper that installs the prebuilt CLI binary
 - `docs/site/` — Docusaurus documentation site (published to scaffoldstellar.com)
 - `crates/stellar-scaffold-test/fixtures/` — fixture contracts and a boilerplate project for CLI integration tests