Fix and test sr25519 signing in nostd (#1872)

* Fix and test sr25519 signing in nostd * Remove sr25519 signing test on nostd for thumbabi target * Don't use sr25519 feature in nostd tests * Fix nits, remove WASM deps from nostd test, improve comments * Change copypasted comment * fmt * Update CI to account for signer tests
2026-06-13 22:11:06 +00:00 · 2025-01-30 17:13:58 +00:00
parent 94f4e7f39b
commit 29bf00e209
12 changed files with 273 additions and 130 deletions
@@ -291,6 +291,12 @@ jobs:
      - name: Install cargo-nextest
        run: cargo install cargo-nextest

+      - name: Run subxt-signer no-std tests
+        uses: actions-rs/cargo@v1.0.3
+        with:
+          command: test
+          working-directory: signer/tests/no-std
+
      - name: Run tests
        uses: actions-rs/cargo@v1.0.3
        with:
@@ -416,7 +422,7 @@ jobs:
        run: |
          wasm-pack test --headless --firefox
          wasm-pack test --headless --chrome
-        working-directory: signer/wasm-tests
+        working-directory: signer/tests/wasm

      - if: "failure()"
        uses: "andymckay/cancel-action@a955d435292c0d409d104b57d8e78435a93a6ef1" # v0.5
@@ -66,7 +66,7 @@ hmac = { workspace = true }
 zeroize = { workspace = true }
 bip39 = { workspace = true }
 bip32 = { workspace = true, features = ["alloc", "secp256k1"], optional = true }
-schnorrkel = { workspace = true, optional = true }
+schnorrkel = { workspace = true, optional = true, features = ["getrandom"] }
 secp256k1 = { workspace = true, optional = true, features = [
    "alloc",
    "recovery",
@@ -3,6 +3,10 @@
 // see LICENSE for license details.

 //! An sr25519 keypair implementation.
+//!
+//! **Note:** This implementation requires the `getrandom` dependency to obtain randomness,
+//! and will not compile on targets that it does not support. See the supported `getrandom`
+//! targets here: <https://docs.rs/getrandom/latest/getrandom/#supported-targets>.

 use core::str::FromStr;

@@ -0,0 +1,19 @@
+[package]
+name = "nostd-tests"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dev-dependencies]
+
+# This crate is not a part of the workspace, to ensure that no features
+# are enabled for it at the workspace level; which conflict with this test.
+subxt-signer = { path = "../../", default-features = false, features = [
+    "sr25519",
+    "ecdsa",
+    "unstable-eth",
+] }
+
+# this shouldn't be needed, it's in workspace.exclude, but still
+# I get the complaint unless I add it...
+[workspace]
@@ -0,0 +1,51 @@
+#![no_std]
+
+use subxt_signer::{ecdsa, eth, sr25519};
+
+// Run the tests by calling:
+//
+// ```text
+// cargo test
+// ```
+//
+// These are independent of any other package to ensure that nothing
+// else enabled the same feature flag that subxt-signer needs to work ok
+// (subxt seems to, for instance).
+
+#[test]
+fn sr25519_signing_works() {
+    let alice = sr25519::dev::alice();
+
+    // There's some non-determinism in the signing, so this ensures that
+    // the rand stuff is configured properly to run ok in wasm.
+    let signature = alice.sign(b"Hello there");
+    assert!(sr25519::verify(
+        &signature,
+        b"Hello there",
+        &alice.public_key()
+    ));
+}
+
+#[test]
+fn ecdsa_signing_works() {
+    let alice = ecdsa::dev::alice();
+
+    // There's some non-determinism in the signing, so this ensures that
+    // the rand stuff is configured properly to run ok in wasm.
+    let signature = alice.sign(b"Hello there");
+    assert!(ecdsa::verify(
+        &signature,
+        b"Hello there",
+        &alice.public_key()
+    ));
+}
+
+#[test]
+fn eth_signing_works() {
+    let alice = eth::dev::alith();
+
+    // There's some non-determinism in the signing, so this ensures that
+    // the rand stuff is configured properly to run ok in wasm.
+    let signature = alice.sign(b"Hello there");
+    assert!(eth::verify(&signature, b"Hello there", &alice.public_key()));
+}
@@ -0,0 +1,2 @@
+/target
+Cargo.lock
@@ -13,7 +13,7 @@ console_error_panic_hook = "0.1.7"
 # enable the "web" feature here but don't want it enabled as part
 # of workspace builds. Also disable the "subxt" feature here because
 # we want to ensure it works in isolation of that.
-subxt-signer = { path = "..", default-features = false, features = [
+subxt-signer = { path = "../../", default-features = false, features = [
    "web",
    "sr25519",
    "ecdsa",
@@ -8,7 +8,7 @@ wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
 // Run the tests by calling:
 //
 // ```text
-// wasm-pack test --firefox --headless`
+// wasm-pack test --firefox --headless
 // ```
 //
 // These are independent of any other package to ensure that nothing
@@ -2,6 +2,16 @@
 # It is not intended for manual editing.
 version = 4

+[[package]]
+name = "aead"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0"
+dependencies = [
+ "crypto-common",
+ "generic-array",
+]
+
 [[package]]
 name = "ahash"
 version = "0.8.11"
@@ -16,21 +26,21 @@ dependencies = [

 [[package]]
 name = "allocator-api2"
-version = "0.2.16"
+version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5"
+checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"

 [[package]]
 name = "arrayref"
-version = "0.3.7"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b4930d2cb77ce62f89ee5d5289b4ac049559b1c45539271f5ed4fdc7db34545"
+checksum = "76a2e8124351fda1ef8aaaa3bbd7ebbcb486bbcd4225aca0aa0d84bb2db8fecb"

 [[package]]
 name = "arrayvec"
-version = "0.7.4"
+version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
+checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"

 [[package]]
 name = "base58"
@@ -123,25 +133,45 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

 [[package]]
-name = "constant_time_eq"
-version = "0.3.0"
+name = "const_format"
+version = "0.2.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7144d30dcf0fafbce74250a3963025d8d52177934239851c917d29f1df280c2"
+checksum = "126f97965c8ad46d6d9163268ff28432e8f6a1196a55578867832e3049df63dd"
+dependencies = [
+ "const_format_proc_macros",
+]
+
+[[package]]
+name = "const_format_proc_macros"
+version = "0.2.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d57c2eccfb16dbac1f4e61e206105db5820c9d26c3c472bc17c774259ef7744"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "constant_time_eq"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c74b8349d32d297c9134b8c88677813a227df8f779daa29bfc29c183fe3dca6"

 [[package]]
 name = "cpufeatures"
-version = "0.2.12"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53fe5e26ff1b7aef8bca9c6080520cfb8d9333c7568e1829cef191a9723e5504"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
 dependencies = [
 "libc",
 ]

 [[package]]
 name = "crunchy"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
+checksum = "43da5946c66ffcc7745f48db692ffbb10a83bfe0afd96235c5c2a4fb23994929"

 [[package]]
 name = "crypto-common"
@@ -150,21 +180,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
 dependencies = [
 "generic-array",
+ "rand_core",
 "typenum",
 ]

 [[package]]
 name = "curve25519-dalek"
-version = "4.1.2"
+version = "4.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a677b8922c94e01bdbb12126b0bc852f00447528dee1782229af9c720c3f348"
+checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
 dependencies = [
 "cfg-if",
 "cpufeatures",
 "curve25519-dalek-derive",
 "digest",
 "fiat-crypto",
- "platforms",
 "rustc_version",
 "subtle",
 "zeroize",
@@ -178,7 +208,7 @@ checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -202,7 +232,7 @@ dependencies = [
 "proc-macro2",
 "quote",
 "strsim",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -213,7 +243,7 @@ checksum = "d336a2a514f6ccccaa3e09b02d41d35330c07ddf03a62165fcec10bb561c7806"
 dependencies = [
 "darling_core",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -224,7 +254,7 @@ checksum = "62d671cc41a825ebabc75757b62d3d168c577f9149b2d49ece1dad1f72119d25"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -244,7 +274,7 @@ checksum = "cb7330aeadfbe296029522e6c40f315320aba36fc43a5b3632f3795348f3bd22"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -260,9 +290,9 @@ dependencies = [

 [[package]]
 name = "either"
-version = "1.10.0"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11157ac094ffbdde99aa67b23417ebdd801842852b500e395a45a9c0aac03e4a"
+checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"

 [[package]]
 name = "equivalent"
@@ -272,9 +302,9 @@ checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"

 [[package]]
 name = "fiat-crypto"
-version = "0.2.7"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c007b1ae3abe1cb6f85a16305acd418b7ca6343b953633fee2b76d8f108b830f"
+checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"

 [[package]]
 name = "fixed-hash"
@@ -332,6 +362,17 @@ dependencies = [
 "version_check",
 ]

+[[package]]
+name = "getrandom"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "getrandom_or_panic"
 version = "0.0.3"
@@ -351,6 +392,12 @@ dependencies = [
 "allocator-api2",
 ]

+[[package]]
+name = "hashbrown"
+version = "0.15.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
+
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -404,30 +451,30 @@ dependencies = [

 [[package]]
 name = "impl-trait-for-tuples"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11d7a9f6330b71fea57921c9b61c47ee6e84f72d394754eff6163ae67e7395eb"
+checksum = "a0eb5a3343abf848c0984fe4604b2b105da9539376e24fc0a3b0007411ae4fd9"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 1.0.109",
+ "syn",
 ]

 [[package]]
 name = "indexmap"
-version = "2.5.0"
+version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68b900aa2f7301e21c36462b170ee99994de34dff39a4a6a528e80e7376d07e5"
+checksum = "8c9c992b02b5b4c94ea26e32fe5bccb7aa7d9f390ab5c1221ff895bc7ea8b652"
 dependencies = [
 "equivalent",
- "hashbrown",
+ "hashbrown 0.15.2",
 ]

 [[package]]
 name = "itoa"
-version = "1.0.10"
+version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"

 [[package]]
 name = "keccak"
@@ -450,9 +497,9 @@ dependencies = [

 [[package]]
 name = "libc"
-version = "0.2.153"
+version = "0.2.169"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
+checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"

 [[package]]
 name = "libc_alloc"
@@ -462,9 +509,9 @@ checksum = "7581282928bc99698341d1de7590964c28db747c164eaac9409432a3eaed098a"

 [[package]]
 name = "memchr"
-version = "2.7.1"
+version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"

 [[package]]
 name = "merlin"
@@ -480,34 +527,36 @@ dependencies = [

 [[package]]
 name = "once_cell"
-version = "1.19.0"
+version = "1.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"

 [[package]]
 name = "parity-scale-codec"
-version = "3.6.12"
+version = "3.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "306800abfa29c7f16596b5970a588435e3d5b3149683d00c12b699cc19f895ee"
+checksum = "b91c2d9a6a6004e205b7e881856fb1a0f5022d382acc2c01b52185f7b6f65997"
 dependencies = [
 "arrayvec",
 "bitvec",
 "byte-slice-cast",
+ "const_format",
 "impl-trait-for-tuples",
 "parity-scale-codec-derive",
+ "rustversion",
 "serde",
 ]

 [[package]]
 name = "parity-scale-codec-derive"
-version = "3.6.12"
+version = "3.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d830939c76d294956402033aee57a6da7b438f2294eb94864c37b0569053a42c"
+checksum = "77555fd9d578b6470470463fded832619a5fec5ad6cbc551fe4d7507ce50cd3a"
 dependencies = [
 "proc-macro-crate",
 "proc-macro2",
 "quote",
- "syn 1.0.109",
+ "syn",
 ]

 [[package]]
@@ -521,15 +570,9 @@ dependencies = [

 [[package]]
 name = "pin-project-lite"
-version = "0.2.13"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8afb450f006bf6385ca15ef45d71d2288452bc3683ce2e2cacc0d18e4be60b58"
-
-[[package]]
-name = "platforms"
-version = "3.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "626dec3cac7cc0e1577a2ec3fc496277ec2baa084bebad95bb6fdbfae235f84c"
+checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"

 [[package]]
 name = "polkadot-sdk"
@@ -581,7 +624,7 @@ dependencies = [
 "proc-macro-error-attr2",
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -595,9 +638,9 @@ dependencies = [

 [[package]]
 name = "quote"
-version = "1.0.37"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
 "proc-macro2",
 ]
@@ -613,12 +656,15 @@ name = "rand_core"
 version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]

 [[package]]
 name = "regex"
-version = "1.11.0"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38200e5ee88914975b69f657f0801b6f6dccafd44fd9326302a4aaeecfacb1d8"
+checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
 dependencies = [
 "regex-automata",
 "regex-syntax",
@@ -626,9 +672,9 @@ dependencies = [

 [[package]]
 name = "regex-automata"
-version = "0.4.8"
+version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "368758f23274712b504848e9d5a6f010445cc8b87a7cdb4d7cbee666c1288da3"
+checksum = "809e8dc61f6de73b46c85f4c96486310fe304c434cfa43669d7b40f711150908"
 dependencies = [
 "regex-syntax",
 ]
@@ -641,18 +687,24 @@ checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"

 [[package]]
 name = "rustc_version"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
+checksum = "cfcb3a22ef46e85b45de6ee7e79d063319ebb6594faafcf1c225ea92ab6e9b92"
 dependencies = [
 "semver",
 ]

 [[package]]
-name = "ryu"
-version = "1.0.17"
+name = "rustversion"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
+checksum = "f7c45b9784283f1b2e7fb61b42047c2fd678ef0960d4f6f1eba131594cc369d4"
+
+[[package]]
+name = "ryu"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ea1a2d0a644769cc99faa24c3ad26b379b786fe7c36fd3c546254801650e6dd"

 [[package]]
 name = "scale-bits"
@@ -690,7 +742,7 @@ dependencies = [
 "darling",
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -718,14 +770,14 @@ dependencies = [
 "proc-macro-crate",
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
 name = "scale-info"
-version = "2.11.5"
+version = "2.11.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1aa7ffc1c0ef49b0452c6e2986abf2b07743320641ffd5fc63d552458e3b779b"
+checksum = "346a3b32eba2640d17a9cb5927056b08f3de90f65b72fe09402c2ad07d684d0b"
 dependencies = [
 "bitvec",
 "cfg-if",
@@ -737,14 +789,14 @@ dependencies = [

 [[package]]
 name = "scale-info-derive"
-version = "2.11.5"
+version = "2.11.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46385cc24172cf615450267463f937c10072516359b3ff1cb24228a4a08bf951"
+checksum = "c6630024bf739e2179b91fb424b28898baf819414262c5d376677dbff1fe7ebf"
 dependencies = [
 "proc-macro-crate",
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -766,7 +818,7 @@ dependencies = [
 "proc-macro2",
 "quote",
 "scale-info",
- "syn 2.0.96",
+ "syn",
 "thiserror",
 ]

@@ -791,6 +843,7 @@ version = "0.11.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8de18f6d8ba0aad7045f5feae07ec29899c1112584a38509a84ad7b04451eaa0"
 dependencies = [
+ "aead",
 "arrayref",
 "arrayvec",
 "curve25519-dalek",
@@ -813,35 +866,35 @@ dependencies = [

 [[package]]
 name = "semver"
-version = "1.0.22"
+version = "1.0.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92d43fe69e652f3df9bdc2b85b2854a0825b86e4fb76bc44d945137d053639ca"
+checksum = "f79dfe2d285b0488816f30e700a7438c5a73d816b5b7d3ac72fbc48b0d185e03"

 [[package]]
 name = "serde"
-version = "1.0.210"
+version = "1.0.217"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8e3592472072e6e22e0a54d5904d9febf8508f65fb8552499a1abc7d1078c3a"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
 dependencies = [
 "serde_derive",
 ]

 [[package]]
 name = "serde_derive"
-version = "1.0.210"
+version = "1.0.217"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "243902eda00fad750862fc144cea25caca5e20d615af0a81bee94ca738f1df1f"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
 name = "serde_json"
-version = "1.0.128"
+version = "1.0.138"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ff5456707a1de34e7e37f2a6fd3d3f808c318259cbd01ab6377795054b483d8"
+checksum = "d434192e7da787e94a6ea7e9670b26a036d0ca41e0b7efb2676dd32bae872949"
 dependencies = [
 "itoa",
 "memchr",
@@ -904,9 +957,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"

 [[package]]
 name = "subtle"
-version = "2.5.0"
+version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
+checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"

 [[package]]
 name = "subxt-codegen"
@@ -919,7 +972,7 @@ dependencies = [
 "scale-info",
 "scale-typegen",
 "subxt-metadata",
- "syn 2.0.96",
+ "syn",
 "thiserror",
 ]

@@ -932,7 +985,7 @@ dependencies = [
 "derive-where",
 "frame-decode",
 "frame-metadata",
- "hashbrown",
+ "hashbrown 0.14.5",
 "hex",
 "impl-serde",
 "keccak-hash",
@@ -974,7 +1027,7 @@ dependencies = [
 "scale-typegen",
 "subxt-codegen",
 "subxt-utils-fetchmetadata",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -983,7 +1036,7 @@ version = "0.38.0"
 dependencies = [
 "frame-decode",
 "frame-metadata",
- "hashbrown",
+ "hashbrown 0.14.5",
 "parity-scale-codec",
 "polkadot-sdk",
 "scale-info",
@@ -1019,17 +1072,6 @@ dependencies = [
 "thiserror",
 ]

-[[package]]
-name = "syn"
-version = "1.0.109"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
-
 [[package]]
 name = "syn"
 version = "2.0.96"
@@ -1064,7 +1106,7 @@ checksum = "26afc1baea8a989337eeb52b6e72a039780ce45c3edfcc9c5b9d112feeb173c2"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
@@ -1095,9 +1137,9 @@ dependencies = [

 [[package]]
 name = "tracing"
-version = "0.1.40"
+version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3523ab5a71916ccf420eebdf5521fcef02141234bbc0b8a49f2fdc4544364ef"
+checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0"
 dependencies = [
 "pin-project-lite",
 "tracing-core",
@@ -1105,9 +1147,9 @@ dependencies = [

 [[package]]
 name = "tracing-core"
-version = "0.1.32"
+version = "0.1.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c06d3da6113f116aaee68e4d601191614c9053067f9ab7f6edbcb161237daa54"
+checksum = "e672c95779cf947c5311f83787af4fa8fffd12fb27e4993211a84bdfd9610f9c"

 [[package]]
 name = "twox-hash"
@@ -1140,21 +1182,33 @@ dependencies = [

 [[package]]
 name = "unicode-ident"
-version = "1.0.12"
+version = "1.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+checksum = "a210d160f08b701c8721ba1c726c11662f877ea6b7094007e1ca9a1041945034"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"

 [[package]]
 name = "version_check"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"

 [[package]]
 name = "winnow"
-version = "0.6.20"
+version = "0.6.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36c1fec1a2bb5866f07c25f68c26e565c4c200aebb96d7e55710c19d3e8ac49b"
+checksum = "ad699df48212c6cc6eb4435f35500ac6fd3b9913324f938aea302022ce19d310"
 dependencies = [
 "memchr",
 ]
@@ -1170,29 +1224,29 @@ dependencies = [

 [[package]]
 name = "zerocopy"
-version = "0.7.32"
+version = "0.7.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74d4d3961e53fa4c9a25a8637fc2bfaf2595b3d3ae34875568a5cf64787716be"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
 dependencies = [
 "zerocopy-derive",
 ]

 [[package]]
 name = "zerocopy-derive"
-version = "0.7.32"
+version = "0.7.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]

 [[package]]
 name = "zeroize"
-version = "1.7.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
 dependencies = [
 "zeroize_derive",
 ]
@@ -1205,5 +1259,5 @@ checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.96",
+ "syn",
 ]
@@ -8,7 +8,7 @@ resolver = "2"
 [dependencies]
 subxt-metadata = { path = "../../metadata", default-features = false }
 subxt-core = { path = "../../core", default-features = false }
-subxt-signer = { path = "../../signer", default-features = false, features = ["subxt", "sr25519"] }
+subxt-signer = { path = "../../signer", default-features = false, features = ["subxt"] }
 subxt-macro = { path = "../../macro" }
 codec = { package = "parity-scale-codec", version = "3.6.9", default-features = false, features = ["derive"] }
 libc_alloc = { version = "1.0.6" }
@@ -41,21 +41,28 @@ fn compile_test() {
    const METADATA: &[u8] = include_bytes!("../../../artifacts/polkadot_metadata_small.scale");
    subxt_metadata::Metadata::decode(&mut &METADATA[..]).expect("should be valid metadata");

-    // Subxt Signer compiles:
-    use subxt_signer::sr25519;
-    let keypair = sr25519::dev::alice();
-    let message = b"Hello!";
-    let _signature = keypair.sign(message);
-    let _public_key = keypair.public_key();
+    // Subxt signer compiles (though nothing much works on this particular nostd target...):
+    // Supported targets: <https://docs.rs/getrandom/latest/getrandom/#supported-targets>
+    use core::str::FromStr;
+    let _ = subxt_signer::SecretUri::from_str("//Alice/bar");

-    // Note: `ecdsa` is not compiling for the `thumbv7em-none-eabi` target.
+    // Note: sr25519 needs randomness, but `thumbv7em-none-eabi` isn't supported by
+    // `getrandom`, so we can't sign in nostd on this target.
+    //
+    // use subxt_signer::sr25519;
+    // let keypair = sr25519::dev::alice();
+    // let message = b"Hello!";
+    // let _signature = keypair.sign(message);
+    // let _public_key = keypair.public_key();
+
+    // Note: `ecdsa` is also not compiling for the `thumbv7em-none-eabi` target owing to
+    // an issue compiling `secp256k1-sys`.
    //
    // use subxt_signer::ecdsa;
    // let keypair = ecdsa::dev::alice();
    // let message = b"Hello!";
    // let _signature = keypair.sign(message);
    // let _public_key = keypair.public_key();
-    //

    // Subxt Core compiles:
    let _era = subxt_core::utils::Era::Immortal;