chore: add check no-std to ci and remove dependency pins

Author: aagbotemi

.github/workflows/rust.yml

@@ -16,6 +16,9 @@ jobs:
         rust:
           - version: stable
           - version: 1.85.0
+        features:
+          - --no-default-features --features miniscript/no-std
+          - --all-features
     steps:
       - uses: actions/checkout@v4
       - name: Install Rust
@@ -25,8 +28,23 @@ jobs:
       - name: Pin dependencies for MSRV
         if: matrix.rust.version == '1.85.0'
         run: ./ci/pin-msrv.sh
+      - name: Build
+        run: cargo build --all-targets ${{ matrix.features }}
       - name: Test
-        run: cargo test --no-fail-fast --all-features
+        run: cargo test --no-fail-fast ${{ matrix.features }}
+
+  check-no-std:
+    name: Check no_std
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@v1
+        with:
+            toolchain: stable
+      - name: Check no-std
+        run: cargo check --no-default-features --features miniscript/no-std
 
   fmt-clippy:
     runs-on: ubuntu-latest

ci/pin-msrv.sh

@@ -3,21 +3,4 @@
 set -x
 set -euo pipefail
 
-# Script to pin dependencies for MSRV
-
-# cargo clean
-
-# rm -f Cargo.lock
-
-# rustup default 1.65.0
-
-cargo update -p zstd-sys --precise "2.0.8+zstd.1.5.5"
-cargo update -p time --precise "0.3.20"
-cargo update -p home --precise "0.5.5"
-cargo update -p flate2 --precise "1.0.35"
-cargo update -p once_cell --precise "1.20.3"
-cargo update -p bzip2-sys --precise "0.1.12"
-cargo update -p ring --precise "0.17.12"
-cargo update -p once_cell --precise "1.20.3"
-cargo update -p base64ct --precise "1.6.0"
-cargo update -p minreq --precise "2.13.2"
+echo "MSRV 1.85.0 - no dependency pins needed"

src/input.rs

@@ -1,6 +1,6 @@
 use alloc::boxed::Box;
 use alloc::sync::Arc;
-use alloc::vec::Vec;
+use alloc::{vec, vec::Vec};
 use core::fmt;
 
 use bitcoin::constants::COINBASE_MATURITY;

src/input_candidates.rs

@@ -1,4 +1,4 @@
-use alloc::vec::Vec;
+use alloc::{vec, vec::Vec};
 use core::fmt;
 use core::ops::Deref;
 

src/selection.rs

@@ -1,5 +1,5 @@
+use alloc::vec::Vec;
 use core::fmt::{Debug, Display};
-use std::vec::Vec;
 
 use bdk_coin_select::FeeRate;
 use bitcoin::{absolute, transaction, Sequence};

src/signer.rs

@@ -1,6 +1,6 @@
+use alloc::collections::BTreeMap;
 use alloc::string::ToString;
 use alloc::vec::Vec;
-use std::collections::BTreeMap;
 
 use bitcoin::{
     psbt::{GetKey, GetKeyError, KeyRequest},