Module config 

Zero-config tunables for the consumption faces over the paid pull engine (config::PullConfig, #1848): every knob defaults, so a caller overrides only what it must, and construction needs no network or chain access. Zero-config tunables for the consumption faces over the paid pull engine (Downloader, Streamer, #1848).

PullConfig holds only tunables, each with a sensible default. The REQUIRED per-fetch inputs — identity, the connection, the spend budget, the provider set — are not here; they flow through the engine’s existing params (crate::PoolContext, the iroh::Endpoint, discovered candidates). That split is what lets a PullConfig construct with no network or chain access.

The payment interval is deliberately NOT a tunable: it is the fixed protocol constant decdn_protocol::client::CHUNK_BYTES (1 MiB, #1676).

Structs

PullConfig

Zero-config tunables shared by the consumption faces.