# @integraledger/lcp/tempo > The exports of @integraledger/lcp/tempo. Source: https://lcp.integraledger.com/reference/api/tempo ## Interfaces ### KeyAuthorizationUnsigned #### Properties | Property | Type | Description | | ----------------------- | ------------------------------------------------- | ----------------------------------------------------------------- | | `request` | `object` | `digest` is keccak256(rlp(authorization)); the root key signs it. | | `request.authorization` | [`TempoKeyAuthorization`](#tempokeyauthorization) | - | | `request.digest` | `` `0x${string}` `` | - | | `request.kind` | `"tempo-key-authorization"` | - | #### Methods ##### complete() > **complete**(`rootSignature`): [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | [`MppCredential`](https://lcp.integraledger.com/reference/api/mpp#mppcredential) ###### Parameters | Parameter | Type | | --------------- | ------------------- | | `rootSignature` | `` `0x${string}` `` | ###### Returns [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | [`MppCredential`](https://lcp.integraledger.com/reference/api/mpp#mppcredential) *** ### TempoCall #### Properties | Property | Type | | -------- | ----------------------------- | | `input` | `Uint8Array` | | `to` | `` `0x${string}` `` \| `null` | | `value` | `bigint` | *** ### TempoDescriptor #### Properties | Property | Type | | -------------------- | ------------------- | | `authorizedSigner` | `` `0x${string}` `` | | `expiringNonceHash` | `` `0x${string}` `` | | `operator` | `` `0x${string}` `` | | `payee` | `` `0x${string}` `` | | `payer` | `` `0x${string}` `` | | `salt` | `` `0x${string}` `` | | `token` | `` `0x${string}` `` | *** ### TempoKeyAuthorization #### Properties | Property | Type | | --------------- | ------------------- | | `allowedCalls` | `object`\[] | | `chainId` | `bigint` | | `expiry` | `bigint` | | `keyId` | `` `0x${string}` `` | | `keyType` | `0` \| `1` \| `2` | | `limits` | `object`\[] | | `witness` | `` `0x${string}` `` | ## Variables ### ACCESS\_KEY\_SPEND\_TOPIC > `const` **ACCESS\_KEY\_SPEND\_TOPIC**: `"0xe0815e3aaadddf4dd75bde97fc060f0c38afe18e87a169be86a3f5c28247f192"` AccessKeySpend(address,address,address,uint256,uint256): the account, the key id and the token are topics 1 to 3; the keychain emits it for each spend an access key with enforced limits makes against its limit. *** ### ACCOUNT\_KEYCHAIN > `const` **ACCOUNT\_KEYCHAIN**: `"0xaaaaaaaa00000000000000000000000000000000"` The account keychain precompile. *** ### CHANNEL\_CLOSED\_V1\_TOPIC > `const` **CHANNEL\_CLOSED\_V1\_TOPIC**: `"0x92ed5fe0fe56b3f4185e688efb342e92a4492b9df29ad5de596c44e64d097b51"` ChannelClosed(bytes32,address,address,uint256,uint256), the v1 escrow's event. *** ### CHANNEL\_CLOSED\_V2\_TOPIC > `const` **CHANNEL\_CLOSED\_V2\_TOPIC**: `"0x5613aed96d5bf39f928408dbe1d4143490b9bb5957eac2dd8e69b5dc4b2206e6"` ChannelClosed(bytes32,address,address,uint96,uint96) *** ### CHANNEL\_OPENED\_V1\_TOPIC > `const` **CHANNEL\_OPENED\_V1\_TOPIC**: `"0x4516edb7b2ea29d92a0dbb5ff857203558b677157f4115d582b66e07b90ac8a8"` ChannelOpened(bytes32,address,address,address,address,uint256) *** ### CHANNEL\_OPENED\_V2\_TOPIC > `const` **CHANNEL\_OPENED\_V2\_TOPIC**: `"0xdebaba36f0e9c7978f536fed432d9360b1f9646d7ca88531c34c3eae43f154a7"` ChannelOpened(bytes32,address,address,address,address,address,bytes32,bytes32,uint96) *** ### KEY\_AUTHORIZATION\_WITNESS\_TOPIC > `const` **KEY\_AUTHORIZATION\_WITNESS\_TOPIC**: `"0x1f09d8956d18ea185372a3f7f40aca24bb45f303920c37c5f0605f4871da41f6"` KeyAuthorizationWitness(address,bytes32) *** ### KEY\_AUTHORIZED\_TOPIC > `const` **KEY\_AUTHORIZED\_TOPIC**: `"0x7c46af0758d3eca5e8195833bff1e5153f6249fc0f2968a878fd28544315a03c"` KeyAuthorized(address,address,uint8,uint64): the account and the key id are topics 1 and 2. *** ### KEY\_REVOKED\_TOPIC > `const` **KEY\_REVOKED\_TOPIC**: `"0x14ce4f0c8c12936436b733974fb13d10fc13e8c41c06dc8e19d82001c93d7989"` KeyRevoked(address,address) *** ### OPEN\_V1\_SELECTOR > `const` **OPEN\_V1\_SELECTOR**: `"0xc79ea485"` open(address,address,uint128,bytes32,address) *** ### OPEN\_V2\_SELECTOR > `const` **OPEN\_V2\_SELECTOR**: `"0xedc53b00"` open(address,address,address,uint96,bytes32,address) *** ### TIP20\_CHANNEL\_RESERVE > `const` **TIP20\_CHANNEL\_RESERVE**: `"0x4d50500000000000000000000000000000000000"` The TIP-20 channel reserve precompile. *** ### TRANSFER\_WITH\_MEMO\_SELECTOR > `const` **TRANSFER\_WITH\_MEMO\_SELECTOR**: `"0x95777d59"` The first four bytes of keccak256("transferWithMemo(address,uint256,bytes32)"). *** ### TRANSFER\_WITH\_MEMO\_TOPIC > `const` **TRANSFER\_WITH\_MEMO\_TOPIC**: `"0x57bc7354aa85aed339e000bccffabbc529466af35f0772c8f8ee1145927de7f0"` keccak256("TransferWithMemo(address,address,uint256,bytes32)") ## Functions ### decodeKeyAuthorization() > **decodeKeyAuthorization**(`signed`): [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | \{ `digest`: `` `0x${string}` ``; `keyId`: `` `0x${string}` ``; `witness?`: `` `0x${string}` ``; } Reads a signed key authorization: an RLP list of the authorization (3 to 9 items) and a byte-string signature. The digest is keccak256 over the authorization's bytes as received. The witness is item 6, 32 bytes, when present. #### Parameters | Parameter | Type | | --------- | ------------------- | | `signed` | `` `0x${string}` `` | #### Returns [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | \{ `digest`: `` `0x${string}` ``; `keyId`: `` `0x${string}` ``; `witness?`: `` `0x${string}` ``; } *** ### decodeTempoTx() > **decodeTempoTx**(`wire`): [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | \{ `calls`: [`TempoCall`](#tempocall)\[]; `chainId`: `bigint`; `validBefore`: `bigint` | `null`; } The chain id, the calls and `valid_before` of a signed `0x76` transaction. Each call is `rlp([to, value, input])`, with an empty `to` read as null. `valid_before` written empty is null. #### Parameters | Parameter | Type | | --------- | ------------ | | `wire` | `Uint8Array` | #### Returns [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) | \{ `calls`: [`TempoCall`](#tempocall)\[]; `chainId`: `bigint`; `validBefore`: `bigint` | `null`; } *** ### encodeKeyAuthorization() > **encodeKeyAuthorization**(`a`, `signature?`): `Uint8Array`\<`ArrayBufferLike`> | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) rlp(\[chain\_id, key\_type, key\_id, expiry, limits, allowed\_calls, witness]); with a signature, rlp(\[that list, signature]). At most 16 limits and 16 scopes, 16 selector rules each and 16 recipients each. #### Parameters | Parameter | Type | | ------------ | ------------------------------------------------- | | `a` | [`TempoKeyAuthorization`](#tempokeyauthorization) | | `signature?` | `` `0x${string}` `` | #### Returns `Uint8Array`\<`ArrayBufferLike`> | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) *** ### expiringNonceHash() > **expiringNonceHash**(`signedTx`, `sender`): `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) keccak256(`0x76` ‖ rlp(every envelope field before the sender's signature) ‖ sender). When a fee payer has signed, `fee_token` is written as `0x80` and the fee payer's signature as `0x00`, as the sender signed them. #### Parameters | Parameter | Type | | ---------- | ------------------- | | `signedTx` | `Uint8Array` | | `sender` | `` `0x${string}` `` | #### Returns `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) *** ### keyAccount() > **keyAccount**(`receipt`, `h`, `keyId`): `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) The account for which a receipt's key authorization carried witness `h` and registered `keyId`: topic 1 of the account keychain's `KeyAuthorizationWitness` logs whose topic 2 is `h`, when the keychain's `KeyAuthorized` log in the same receipt names that account and `keyId`. The receipt's status is not read: the authorization is applied before the transaction's calls run. #### Parameters | Parameter | Type | | --------- | --------------------------------------------- | | `receipt` | [`EvmReceipt`](https://lcp.integraledger.com/reference/api/evm#evmreceipt) | | `h` | `` `0x${string}` `` | | `keyId` | `` `0x${string}` `` | #### Returns `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) *** ### memoCalldata() > **memoCalldata**(`to`, `amount`, `memo`): `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) `transferWithMemo(to, amount, memo)` calldata: the selector, then the three 32-byte words. #### Parameters | Parameter | Type | | --------- | ------------------- | | `to` | `` `0x${string}` `` | | `amount` | `bigint` | | `memo` | `` `0x${string}` `` | #### Returns `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) *** ### tempoChannelId() > **tempoChannelId**(`d`): `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) The TIP-20 channel reserve's channel id: keccak256(abi.encode(payer, payee, operator, token, salt, authorizedSigner, expiringNonceHash, escrow, chainId)). #### Parameters | Parameter | Type | | --------- | ------------------------------------------------ | | `d` | [`TempoDescriptor`](#tempodescriptor) & `object` | #### Returns `` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal) *** ### witnessRecover() > **witnessRecover**(`ref`, `reader`): `Promise`\<`` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal)> Reads the transaction's receipt and returns topic 2 of its one `KeyAuthorizationWitness` log from the account keychain. One call. #### Parameters | Parameter | Type | | ----------------- | ------------------------------------------------------------- | | `ref` | \{ `network`: `string`; `transaction`: `` `0x${string}` ``; } | | `ref.network` | `string` | | `ref.transaction` | `` `0x${string}` `` | | `reader` | [`EvmReader`](https://lcp.integraledger.com/reference/api/evm#evmreader) | #### Returns `Promise`\<`` `0x${string}` `` | [`Refusal`](https://lcp.integraledger.com/reference/api#refusal)> ## References ### RECEIVE\_POLICY\_GUARD Re-exports [RECEIVE\_POLICY\_GUARD](https://lcp.integraledger.com/reference/api/evm#receive_policy_guard)