{"id":58353,"library":"sp-application-crypto","title":"SP Application Crypto","description":"Provides facilities for generating application-specific crypto wrapper types for Substrate-based chains.","status":"active","version":"45.0.0","language":"rust","source_language":null,"source_url":"https://github.com/paritytech/polkadot-sdk","tags":["crypto","substrate","polkadot","blockchain","key-types"],"install":[{"cmd":"# Cargo.toml\n[dependencies]\nsp-application-crypto = \"45.0.0\"","lang":"toml","label":"Cargo.toml"},{"cmd":"cargo add sp-application-crypto","lang":"bash","label":"cargo add"}],"dependencies":[],"imports":[{"symbol":"AppKey","correct":"use sp_application_crypto::AppKey;"}],"quickstart":{"code":"use sp_application_crypto::AppKey;\n\nfn main() {\n    // Example: defining an application-specific key type\n    // This is typically used in Substrate runtime development\n    println!(\"Application crypto wrapper\");\n}","lang":"rust","description":"Minimal usage of sp-application-crypto for defining custom crypto types."},"warnings":[{"fix":"Ensure you have the correct Substrate dependencies and enable the 'std' feature for wasm builds.","message":"Requires specific Substrate runtime dependencies and feature flags.","severity":"gotcha","affected_versions":">=45.0.0"}],"env_vars":null,"search_vec":"'applic':2,9 'application-specif':8 'base':17 'blockchain':22 'chain':18 'crypto':3,11,19 'facil':5 'generat':7 'key':24 'key-typ':23 'polkadot':21 'provid':4 'sp':1 'specif':10 'substrat':16,20 'substrate-bas':15 'type':13,25 'wrapper':12","created_at":"2026-06-16T16:20:44.141734+00:00","updated_at":"2026-06-16T16:20:44.141734+00:00","problems":[],"ecosystem":"crates","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://paritytech.github.io/polkadot-sdk/","github":"https://github.com/paritytech/polkadot-sdk","docs":"https://docs.rs/sp-application-crypto/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["crypto"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-16","next_check":"2026-12-13","install_tag":null}}