Module session 

Tempo session payment provider with expiring nonces.

Custom implementation that mirrors tempoxyz/wallet’s approach: uses expiring nonces (nonce=0, nonceKey=MAX, validBefore=now+25s) for channel open transactions instead of fetching sequential nonces via eth_getTransactionCount. This avoids the chicken-and-egg problem when the RPC endpoint is itself 402-gated.

Structs

SessionProvider

Tempo session provider using expiring nonces.

Enums

PendingAction 🔒

Tracks uncommitted channel state from the most recent payment.

Constants

EXPIRING_NONCE_KEY 🔒

Expiring nonce key (U256::MAX) — matches the charge flow.

MAX_FEE_PER_GAS 🔒

Max fee per gas (20 gwei — Tempo’s fixed base fee).

MAX_PRIORITY_FEE_PER_GAS 🔒

Max priority fee per gas.

SESSION_OPEN_GAS_LIMIT 🔒

Default gas limit for session open transactions.

VALID_BEFORE_SECS 🔒

Validity window (in seconds) for expiring nonce transactions.

Statics

GLOBAL_CHANNELS 🔒

Process-wide channel state registry, keyed by origin URL.

GLOBAL_PERSISTED 🔒

Process-wide persisted channel state, shared across ALL origins.

Type Aliases

SharedChannelState 🔒

Shared per-origin in-memory channel state: (channels, key_provisioned).