# SwapperUtils\ Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:24](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L24) Utility class providing helper methods for address parsing, token balances, serialization and other miscellaneous things. ## Type Parameters | Type Parameter | | -------------------------- | | `T` *extends* `MultiChain` | ## Constructors ### Constructor ``` new SwapperUtils(root): SwapperUtils; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:29](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L29) #### Parameters | Parameter | Type | | --------- | -------------------------------------------------------------------------------------------------- | | `root` | [`Swapper`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/classes/Swapper.md)<`T`> | #### Returns `SwapperUtils`<`T`> ## Properties ### bitcoinNetwork ``` readonly bitcoinNetwork: BTC_NETWORK; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:26](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L26) ## Methods ### deserializeSignedTransaction() ``` deserializeSignedTransaction(chainIdentifier, tx): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:606](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L606) Deserializes a signed smart chain transaction #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ----------------- | ----------------- | ----------------------------- | | `chainIdentifier` | `ChainIdentifier` | Smart chain string identifier | | `tx` | `string` | Serialized signed transaction | #### Returns `Promise`<`T`\[`ChainIdentifier`]\[`"SignedTXType"`]> *** ### deserializeUnsignedTransaction() ``` deserializeUnsignedTransaction(chainIdentifier, tx): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:584](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L584) Deserializes an unsigned smart chain transaction #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ----------------- | ----------------- | ------------------------------- | | `chainIdentifier` | `ChainIdentifier` | Smart chain string identifier | | `tx` | `string` | Serialized unsigned transaction | #### Returns `Promise`<`T`\[`ChainIdentifier`]\[`"TX"`]> *** ### destinationTokenSupportsGasDrop() ``` destinationTokenSupportsGasDrop(token): boolean; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:478](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L478) Returns whether when swapping to the provided token a gas drop can be requested #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | --------- | --------------------------------------------------------------------------------------------------------------------- | ----------- | | `token` | [`SCToken`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/SCToken.md)<`ChainIdentifier`> | | #### Returns `boolean` *** ### getBitcoinSpendableBalance() ``` getBitcoinSpendableBalance( wallet, targetChain?, options?): Promise<{ balance: TokenAmount; feeRate: number; }>; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:379](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L379) Returns the spendable balance of a bitcoin wallet #### Parameters | Parameter | Type | Description | | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `wallet` | \| `string` \| [`IBitcoinWallet`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/interfaces/IBitcoinWallet.md) \| [`MinimalBitcoinWalletInterface`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/MinimalBitcoinWalletInterface.md) | Bitcoin wallet to check the spendable balance for, can either be a simple bitcoin address string or a wallet object | | `targetChain?` | `ChainIds`<`T`> | Destination smart chain for the swap, the ensures proper spendable balance is estimated taking into consideration different swap primitives available on different chains | | `options?` | { `feeRate?`: `number`; `gasDrop?`: `boolean`; `minFeeRate?`: `number`; } | Additional options | | `options.feeRate?` | `number` | - | | `options.gasDrop?` | `boolean` | - | | `options.minFeeRate?` | `number` | - | #### Returns `Promise`<{ `balance`: [`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md); `feeRate`: `number`; }> *** ### getLightningInvoiceValue() ``` getLightningInvoiceValue(lnpr): bigint; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:115](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L115) Returns satoshi value of BOLT11 bitcoin lightning invoice WITH AMOUNT, returns null otherwise #### Parameters | Parameter | Type | Description | | --------- | -------- | ----------- | | `lnpr` | `string` | | #### Returns `bigint` *** ### getLNURLTypeAndData() ``` getLNURLTypeAndData(lnurl, shouldRetry?): Promise< | LNURLPay | LNURLWithdraw>; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:106](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L106) Returns type and data about an LNURL #### Parameters | Parameter | Type | Description | | -------------- | --------- | ----------------------------------------------------------- | | `lnurl` | `string` | LNURL link to check, can be either `pay` or `withdraw` type | | `shouldRetry?` | `boolean` | Optional whether HTTP requests should retried on failure | #### Returns `Promise`< | [`LNURLPay`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/LNURLPay.md) | [`LNURLWithdraw`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/LNURLWithdraw.md)> *** ### getNativeToken() ``` getNativeToken(chainIdentifier): SCToken; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:468](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L468) Returns the address of the native currency of the smart chain #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | | ----------------- | ----------------- | | `chainIdentifier` | `ChainIdentifier` | #### Returns [`SCToken`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/SCToken.md)<`ChainIdentifier`> *** ### getRandomSpvVaultPsbt() ``` getRandomSpvVaultPsbt(chainIdentifier, includeGasToken?): Transaction; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:364](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L364) Returns a random PSBT that can be used for fee estimation for SPV vault (UTXO-controlled vault) based swaps [SwapType.SPV\_VAULT\_FROM\_BTC](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#spv_vault_from_btc), the last output (the LP output) is omitted to allow for coinselection algorithm to determine maximum sendable amount there #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ------------------ | ----------------- | ------------------------------------------------------------------------------------ | | `chainIdentifier` | `ChainIdentifier` | Smart chain to swap to | | `includeGasToken?` | `boolean` | Whether to return the PSBT also with the gas token amount (increases the vSize by 8) | #### Returns `Transaction` *** ### getSpendableBalance() ``` getSpendableBalance( wallet, token, options?): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:418](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L418) Returns the maximum spendable balance of the smart chain wallet, deducting the fee needed to initiate a swap for native balances #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | | ------------------------ | --------------------------------------------------------------------------------------------------------------------- | | `wallet` | \| `string` \| `T`\[`ChainIdentifier`]\[`"Signer"`] \| `T`\[`ChainIdentifier`]\[`"NativeSigner"`] | | `token` | [`SCToken`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/SCToken.md)<`ChainIdentifier`> | | `options?` | { `feeMultiplier?`: `number`; `feeRate?`: `any`; } | | `options.feeMultiplier?` | `number` | | `options.feeRate?` | `any` | #### Returns `Promise`<[`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md)> *** ### isLightningInvoice() ``` isLightningInvoice(address): boolean; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:56](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L56) Checks whether an address is a valid BOLT11 bitcoin lightning invoice #### Parameters | Parameter | Type | Description | | --------- | -------- | ---------------- | | `address` | `string` | Address to check | #### Returns `boolean` *** ### isValidBitcoinAddress() ``` isValidBitcoinAddress(address): boolean; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:69](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L69) Checks whether an address is a valid bitcoin address #### Parameters | Parameter | Type | Description | | --------- | -------- | ---------------- | | `address` | `string` | Address to check | #### Returns `boolean` *** ### isValidLightningInvoice() ``` isValidLightningInvoice(address): boolean; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:83](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L83) Checks whether an address is a valid BOLT11 bitcoin lightning invoice WITH AMOUNT #### Parameters | Parameter | Type | Description | | --------- | -------- | ---------------- | | `address` | `string` | Address to check | #### Returns `boolean` *** ### isValidLNURL() ``` isValidLNURL(address): boolean; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:96](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L96) Checks whether an address is a valid LNURL (no checking on type is performed) #### Parameters | Parameter | Type | Description | | --------- | -------- | ---------------- | | `address` | `string` | Address to check | #### Returns `boolean` *** ### isValidSmartChainAddress() ``` isValidSmartChainAddress(address, chainId?): boolean; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:40](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L40) Checks whether a passed address is a valid address on the smart chain #### Parameters | Parameter | Type | Description | | ---------- | --------------- | ------------------------------------------------------ | | `address` | `string` | Address | | `chainId?` | `ChainIds`<`T`> | Smart chain identifier string to check the address for | #### Returns `boolean` *** ### parseAddress() ``` parseAddress(addressString): Promise<{ address: string; amount?: TokenAmount; lnurl?: | LNURLPay | LNURLWithdraw; max?: TokenAmount; min?: TokenAmount; swapType: | FROM_BTCLN | TO_BTC | TO_BTCLN | SPV_VAULT_FROM_BTC; type: "BITCOIN" | "LIGHTNING" | ChainIds | "LNURL"; }>; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:257](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L257) General parser for bitcoin addresses, LNURLs, lightning invoices, smart chain addresses. Also fetches LNURL data (hence async and returns Promise). #### Parameters | Parameter | Type | Description | | --------------- | -------- | ---------------- | | `addressString` | `string` | Address to parse | #### Returns `Promise`<{ `address`: `string`; `amount?`: [`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md); `lnurl?`: | [`LNURLPay`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/LNURLPay.md) | [`LNURLWithdraw`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/LNURLWithdraw.md); `max?`: [`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md); `min?`: [`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md); `swapType`: | [`FROM_BTCLN`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#from_btcln) | [`TO_BTC`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#to_btc) | [`TO_BTCLN`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#to_btcln) | [`SPV_VAULT_FROM_BTC`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#spv_vault_from_btc); `type`: `"BITCOIN"` | `"LIGHTNING"` | `ChainIds`<`T`> | `"LNURL"`; }> Address data or `null` if address doesn't conform to any known format #### Throws Error in address parsing *** ### parseAddressSync() ``` parseAddressSync(addressString): object; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:303](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L303) Synchronous general parser for bitcoin addresses, LNURLs, lightning invoices, smart chain addresses, doesn't fetch LNURL data, returns `swapType: null` instead to prevent returning a Promise #### Parameters | Parameter | Type | Description | | --------------- | -------- | ---------------- | | `addressString` | `string` | Address to parse | #### Returns `object` Address data or `null` if address doesn't conform to any known format | Name | Type | Defined in | | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `address` | `string` | [atomiq-sdk/src/swapper/SwapperUtils.ts:304](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L304) | | `amount?` | [`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md) | [atomiq-sdk/src/swapper/SwapperUtils.ts:309](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L309) | | `max?` | [`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md) | [atomiq-sdk/src/swapper/SwapperUtils.ts:308](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L308) | | `min?` | [`TokenAmount`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/type-aliases/TokenAmount.md) | [atomiq-sdk/src/swapper/SwapperUtils.ts:307](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L307) | | `swapType` | \| [`TO_BTC`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#to_btc) \| [`TO_BTCLN`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#to_btcln) \| [`SPV_VAULT_FROM_BTC`](https://docs.atomiq.exchange/sdk-reference/api/atomiq-sdk/src/enumerations/SwapType.md#spv_vault_from_btc) | [atomiq-sdk/src/swapper/SwapperUtils.ts:306](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L306) | | `type` | `"BITCOIN"` \| `"LIGHTNING"` \| `ChainIds`<`T`> \| `"LNURL"` | [atomiq-sdk/src/swapper/SwapperUtils.ts:305](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L305) | #### Throws Error in address parsing *** ### prepareUnsignedTransactions() ``` prepareUnsignedTransactions(chainIdentifier, txs): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:557](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L557) Prepares a set of unsigned transactions for signing, by adding required nonces or recent blockhashes, might also add hints of account deployment on e.g. Starknet #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ----------------- | ----------------------------------- | ------------------------------------ | | `chainIdentifier` | `ChainIdentifier` | A chain for which to prepare the txs | | `txs` | `T`\[`ChainIdentifier`]\[`"TX"`]\[] | Transactions to prepare | #### Returns `Promise`<`T`\[`ChainIdentifier`]\[`"TX"`]\[]> *** ### randomAddress() ``` randomAddress(chainIdentifier): string; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:500](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L500) Returns a random address for a given smart chain or bitcoin #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ----------------- | -------------------------------- | ----------- | | `chainIdentifier` | `"BITCOIN"` \| `ChainIdentifier` | | #### Returns `string` *** ### randomSigner() ``` randomSigner(chainIdentifier): T[ChainIdentifier]["Signer"]; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:490](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L490) Returns a random signer for a given smart chain #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ----------------- | ----------------- | ----------- | | `chainIdentifier` | `ChainIdentifier` | | #### Returns `T`\[`ChainIdentifier`]\[`"Signer"`] *** ### sendAndConfirm() ``` sendAndConfirm( chainIdentifier, signer, txs, abortSignal?, onBeforePublish?): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:521](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L521) Signs and broadcasts the supplied smart chain transaction #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ------------------ | ------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- | | `chainIdentifier` | `ChainIdentifier` | Smart chain identifier string | | `signer` | \| `T`\[`ChainIdentifier`]\[`"NativeSigner"`] \| `T`\[`ChainIdentifier`]\[`"Signer"`] | Signer to use for signing the transactions | | `txs` | `T`\[`ChainIdentifier`]\[`"TX"`]\[] | An array of transactions to sign | | `abortSignal?` | `AbortSignal` | Abort signal | | `onBeforePublish?` | (`txId`, `rawTx`) => `Promise`<`void`> | Callback invoked before a transaction is sent (invoked for every transaction to be sent) | #### Returns `Promise`<`string`\[]> *** ### sendSignedAndConfirm() ``` sendSignedAndConfirm( chainIdentifier, txs, abortSignal?, onBeforePublish?): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:540](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L540) Broadcasts already signed smart chain transactions #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ------------------ | --------------------------------------------- | ---------------------------------------------------------------------------------------- | | `chainIdentifier` | `ChainIdentifier` | Smart chain identifier string | | `txs` | `T`\[`ChainIdentifier`]\[`"SignedTXType"`]\[] | An array of already signed transactions | | `abortSignal?` | `AbortSignal` | Abort signal | | `onBeforePublish?` | (`txId`, `rawTx`) => `Promise`<`void`> | Callback invoked before a transaction is sent (invoked for every transaction to be sent) | #### Returns `Promise`<`string`\[]> *** ### serializeSignedTransaction() ``` serializeSignedTransaction(chainIdentifier, tx): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:595](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L595) Serializes a signed smart chain transaction #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ----------------- | ------------------------------------------ | --------------------------------- | | `chainIdentifier` | `ChainIdentifier` | Smart chain string identifier | | `tx` | `T`\[`ChainIdentifier`]\[`"SignedTXType"`] | A signed transaction to serialize | #### Returns `Promise`<`string`> *** ### serializeUnsignedTransaction() ``` serializeUnsignedTransaction(chainIdentifier, tx): Promise; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:573](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L573) Serializes an unsigned smart chain transaction #### Type Parameters | Type Parameter | | ------------------------------------ | | `ChainIdentifier` *extends* `string` | #### Parameters | Parameter | Type | Description | | ----------------- | -------------------------------- | ------------------------------------ | | `chainIdentifier` | `ChainIdentifier` | Smart chain string identifier | | `tx` | `T`\[`ChainIdentifier`]\[`"TX"`] | An unsigned transaction to serialize | #### Returns `Promise`<`string`> *** ### stripAddress() ``` stripAddress(addressString): string; ``` Defined in: [atomiq-sdk/src/swapper/SwapperUtils.ts:347](https://github.com/atomiqlabs/atomiq-sdk/blob/786509324f7f09c427e9ccfe527d82e496f06af5/src/swapper/SwapperUtils.ts#L347) Strips the URL encoding around `bitcoin:` and `lightning:` addresses, leaving just the raw address #### Parameters | Parameter | Type | Description | | --------------- | -------- | ---------------- | | `addressString` | `string` | Address to strip | #### Returns `string` Raw clean address