F/btc-lc feature

.github/workflows/local-tests.yml

@@ -23,3 +23,11 @@ jobs:
     - uses: actions/[email protected]
     - name: Build contracts, check formats, and run unit tests (full validation)
       run: cargo test --lib --features full-validation
+  local-build-test-full-validation:
+    runs-on: ubuntu-latest
+    container:
+      image: rust:1.78.0
+    steps:
+    - uses: actions/[email protected]
+    - name: Build contracts, check formats, and run unit tests (BTC light client)
+      run: cargo test --lib --features btc-lc

contracts/babylon/Cargo.toml

@@ -9,6 +9,14 @@ publish = false
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[package.metadata.optimizer]
+default-build = true
+builds = [
+  { name = "btc-lc", features = [
+    "btc-lc",
+  ], default-features = false }
+]
+
 [lib]
 crate-type = ["cdylib", "rlib"]
 # See https://bheisler.github.io/criterion.rs/book/faq.html#cargo-bench-gives-unrecognized-option-errors-for-valid-command-line-options
@@ -22,14 +30,16 @@ bench = false
 test = false
 
 [features]
-# Add feature "cranelift" to default if you need 32 bit or ARM support
+# Add feature "cranelift" to default if you need 32 bits or ARM support
 default = []
-# Use cranelift backend instead of singlepass. This is required for development on 32 bit or ARM machines.
+# Use cranelift backend instead of singlepass. This is required for development on 32 bits or ARM machines.
 cranelift = ["cosmwasm-vm/cranelift"]
 # for quicker tests, cargo test --lib
 library = []
 # feature for enabling the full validation
 full-validation = [ "btc-staking/full-validation" ]
+# Feature for enabling the Bitcoin light client
+btc-lc = []
 
 [dependencies]
 babylon-apis     = { path = "../../packages/apis" }
@@ -69,3 +79,4 @@ thousands              = { workspace = true }
 [[bench]]
 name = "main"
 harness = false
+required-features = ["btc-lc"]