# `Method.tempo.session` \[Low-cost high-throughput payments] Creates a Tempo payment session method for server-side voucher verification and channel management. ## Usage ```ts twoslash import { Mppx, tempo } from 'mppx/server' const mppx = Mppx.create({ // [!code focus:start] methods: [ tempo.session({ currency: '0x20c0000000000000000000000000000000000000', recipient: '0xa726a1CD723409074DF9108A2187cfA19899aCF8', }), ], // [!code focus:end] }) ``` ### With charge and session Register both intents on a single server. ```ts twoslash import { Mppx, tempo } from 'mppx/server' const mppx = Mppx.create({ methods: [ tempo.charge(), tempo.session(), ], }) ``` ## Return type ```ts import type { Method } from 'mppx' type ReturnType = Method.Server ``` ## Parameters ### account (optional) * **Type:** `Account | undefined` Account used as the recipient and for session closure. ### amount (optional) * **Type:** `string` Default amount to charge per unit. ### currency (optional) * **Type:** `Address` Default TIP-20 token address for the payment currency. ### decimals (optional) * **Type:** `number` * **Default:** `6` Decimal places for amount parsing. ### escrowContract (optional) * **Type:** `Address` Escrow contract address for the payment channel. Defaults to the canonical escrow contract for the given chain ID. ### feePayer (optional) * **Type:** `Account` Account for sponsoring open and top-up transaction fees. ### getClient (optional) * **Type:** `(parameters: { chainId: number }) => MaybePromise` Function that returns a viem client for the given chain ID. ### minVoucherDelta (optional) * **Type:** `string` * **Default:** `"0"` Minimum voucher delta to accept as a numeric string. Rejects vouchers where the increment over the previous highest voucher is below this threshold. ### recipient (optional) * **Type:** `Address` Default recipient address for payments. ### sse (optional) * **Type:** `boolean | { poll?: boolean; pollingInterval?: number }` Enable SSE streaming. Pass `true` to enable with defaults, or an options object to configure SSE (for example, `{ poll: true }` for Cloudflare Workers compatibility). ### store (optional) * **Type:** `Store` * **Default:** `Store.memory()` Storage backend for persisting channel and session state. Implements atomic read-modify-write operations for concurrency safety. ```ts twoslash import { Store, tempo } from 'mppx/server' const method = tempo.session({ store: Store.memory(), // [!code focus] }) ``` ### suggestedDeposit (optional) * **Type:** `string` Suggested deposit amount communicated to clients in the challenge. ### testnet (optional) * **Type:** `boolean` Testnet mode. ### unitType (optional) * **Type:** `string` Unit type label (for example, "token", "byte", "request").