wetype-asr

Pure Rust direct-connect WeType (WeChat IME) ASR provider for dicta-asr.

What It Does

• Connects directly to wss://wetype.weixin.qq.com/ppp.
• Registers a fresh device on first run via ECDH + /gen_uin_v2.
• Persists only reusable identity data under XDG_CONFIG_HOME/dicta-asr/wetype-credentials.json.
• Recreates the session AES key on every run.
• Encodes 16 kHz mono PCM to Opus and uploads encrypted protobuf voice frames.

No local WeType app, MMKV files, native dylib, LLDB capture, or sibling wetype/ directory is required at runtime or build time.

CLI

cargo run -p dicta-provider-wetype-asr --bin dicta-provider-wetype-asr -- \
  --input audio.wav \
  --json

Force a fresh registration:

WETYPE_FORCE_REAUTH=1 cargo run -p dicta-provider-wetype-asr --bin dicta-provider-wetype-asr -- \
  --input audio.wav \
  --json

Enable protocol debug logs:

WETYPE_DEBUG=1 cargo run -p dicta-provider-wetype-asr --bin dicta-provider-wetype-asr -- \
  --input audio.wav

Credential Cache

Default path:

$XDG_CONFIG_HOME/dicta-asr/wetype-credentials.json
~/.config/dicta-asr/wetype-credentials.json

Cached fields:

• device_code
• uin
• gen_uin_token
• latest_svr_pubkey
• clock_skew_ms

The ECDH AES key is never persisted.

Rust API

use dicta_asr::{AsrOptions, AsrProvider};
use dicta_core::AudioInput;
use dicta_provider_wetype_asr::{WetypeAsr, WetypeConfig};

# async fn example() -> dicta_asr::AsrResult<()> {
let provider = WetypeAsr::new(WetypeConfig::default())?;
let transcript = provider
    .transcribe(AudioInput::File("audio.wav".into()), AsrOptions::default())
    .await?;
println!("{}", transcript.text);
# Ok(())
# }

Tests

Offline unit tests:

cargo test -p dicta-provider-wetype-asr --lib

Manual live tests:

cargo test -p dicta-provider-wetype-asr --test integration_test -- --ignored