fix(live-runner): per-signer payment type on the LR path (dual-path sibling to #46)

src/livepeer_gateway/live_runner.py

@@ -21,6 +21,7 @@
     GetPaymentResponse,
     LivePaymentSession,
     _freeze_headers,
+    _payment_type_for_signer,
     get_signer_info,
 )
 
@@ -737,10 +738,19 @@ async def _get_runner_payment(
     signer_url: str,
     signer_headers: Optional[dict[str, str]],
 ) -> tuple[LivePaymentSession, GetPaymentResponse]:
+    # Scope/LV2V is a live-video job → always "lv2v". Every other runner (single-shot
+    # fal/tool caps) pays via the per-signer dual-path: legacy Daydream → "lv2v",
+    # modern signers → "byoc". The old hardcoded "live" was rejected by the Daydream
+    # signer ("invalid job type"), breaking LR payment on the default signer.
+    payment_type = (
+        "lv2v"
+        if runner is not None and runner.app == "live-video-to-video/scope"
+        else _payment_type_for_signer(signer_url)
+    )
     session = LivePaymentSession(
         signer_url=signer_url,
         signer_headers=signer_headers,
-        type="lv2v" if runner is not None and runner.app == "live-video-to-video/scope" else "live",
+        type=payment_type,
         payment_params=challenge.payment_params,
         manifest_id=challenge.manifest_id,
         orchestrator_url=challenge.orchestrator_url,

src/livepeer_gateway/remote_signer.py

@@ -8,8 +8,9 @@
 import ssl
 from dataclasses import dataclass
 from functools import lru_cache
-from typing import Any, Optional
+from typing import Any, Literal, Optional
 from urllib.error import HTTPError, URLError
+from urllib.parse import urlparse
 from urllib.request import Request, urlopen
 
 import aiohttp
@@ -19,6 +20,21 @@
 from .errors import LivepeerGatewayError, PaymentError, SignerRefreshRequired
 _LOG = logging.getLogger(__name__)
 
+_LEGACY_DAYDREAM_SIGNER_HOST = "signer.daydream.live"
+
+
+def _payment_type_for_signer(signer_url: str) -> Literal["byoc", "lv2v"]:
+    """Select the payment payload shape for the target signer.
+
+    Legacy Daydream signer (signer.daydream.live) accepts only type:"lv2v";
+    modern signers (pymthouse DMZ, …) accept type:"byoc". Shared by the BYOC and
+    Live Runner payment paths so both speak the dialect their signer understands.
+    """
+    hostname = (urlparse(signer_url).hostname or "").lower()
+    if hostname == _LEGACY_DAYDREAM_SIGNER_HOST:
+        return "lv2v"
+    return "byoc"
+
 @dataclass(frozen=True)
 class GetPaymentResponse:
     payment: str