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spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#amount) */\n amount?: number | string;\n /** `spl-token` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#spl-token) */\n splToken?: Address;\n /** `reference` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#reference) */\n reference?: Address | Address[];\n /** `label` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#label) */\n label?: string;\n /** `message` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#message). */\n message?: string;\n /** `memo` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#memo) */\n memo?: string;\n}\n\n/**\n * Encode a Solana Pay URL\n *\n * @param fields Fields to encode in the URL\n */\nexport function encodeSolanaPayURL(\n fields: SolanaPayTransactionRequestURLFields | 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class SolanaPayResponseError extends Error {\n name = \"SolanaPayResponseError\";\n}\n\nexport interface SolanaPayTransactionRequestGetResponse {\n label: string;\n icon: string;\n}\n\nexport interface SolanaPayTransactionRequestPostResponse {\n transaction: Transaction;\n message?: string;\n}\n\n/**\n * Parse provided input to be a valid Solana Pay Transaction Request's\n * [GET response](https://github.com/solana-foundation/solana-pay/blob/master/SPEC.md#get-response)\n * per the spec\n */\nexport function parseSolanaPayGetResponse(data: any): SolanaPayTransactionRequestGetResponse {\n if (!data.label || typeof data.label !== \"string\") {\n throw new SolanaPayResponseError(\"Invalid response: missing or invalid label\");\n }\n\n if (!data.icon || typeof data.icon !== \"string\") {\n throw new SolanaPayResponseError(\"Invalid response: missing or invalid icon\");\n }\n\n let iconUrl: URL;\n try {\n iconUrl = new URL(data.icon);\n } catch {\n throw new SolanaPayResponseError(\"Invalid 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SolanaPayResponseError(\"Invalid response: missing or invalid transaction\");\n }\n\n if (data.message && typeof data.message !== \"string\") {\n throw new SolanaPayResponseError(\"Invalid response: message must be string\");\n }\n\n let transaction: Transaction | null = null;\n\n try {\n transaction = transactionFromBase64(data.transaction);\n } catch {\n throw new SolanaPayResponseError(\"Invalid transaction data as base64\");\n }\n\n return {\n transaction,\n message: data.message,\n };\n}\n","import { SolanaPayTransactionRequestPostRequest, validateSolanaPayRequestUrl } from \"./request.js\";\nimport {\n parseSolanaPayGetResponse,\n parseSolanaPayPostResponse,\n SolanaPayTransactionRequestGetResponse,\n SolanaPayTransactionRequestPostResponse,\n} from \"./response.js\";\n\n/**\n * Generic HTTP fetcher for Solana Pay transaction request endpoints.\n *\n * Validates URL, makes request, and optionally parses the JSON response.\n *\n * @template TResponse - Expected response type (defaults to unknown)\n * @param url - Solana Pay transaction request URL (must be https://)\n * @param config - Request configuration\n * @param config.method - HTTP method (GET or POST)\n * @param config.body - Request body (JSON stringified)\n * @param config.parser - Optional response parser/validator\n * @param config.requestInit - Optional fetch options\n * @returns Parsed response or raw JSON if no parser provided\n * @throws {Error} Invalid URL, HTTP error, JSON parse error, or schema validation error\n */\nexport async function fetchSolanaPayRequest(\n url: URL,\n config: {\n method: \"GET\" | \"POST\";\n body?: unknown;\n parser?: (data: unknown) => TResponse;\n requestInit?: RequestInit;\n },\n): Promise {\n validateSolanaPayRequestUrl(url);\n\n const baseHeaders: HeadersInit = {\n Accept: \"application/json\",\n \"Accept-Encoding\": \"gzip, deflate, br\",\n };\n\n if (config.method === \"POST\" || config.body !== undefined) {\n baseHeaders[\"Content-Type\"] = \"application/json\";\n }\n\n // Destructure to exclude headers from requestInit since we handle them separately\n const { headers: _headers, ...restRequestInit } = config.requestInit || {};\n\n const response = await fetch(url, {\n method: config.method,\n headers: {\n ...baseHeaders,\n ...config.requestInit?.headers,\n },\n body: config.body !== undefined ? JSON.stringify(config.body) : undefined,\n ...restRequestInit,\n });\n\n if (!response.ok) {\n throw new Error(`HTTP ${response.status}: ${response.statusText}`);\n }\n\n let data: unknown;\n try {\n data = await response.json();\n } catch (error) {\n throw new Error(`Failed to parse response as JSON: ${error instanceof Error ? error.message : String(error)}`);\n }\n\n if (config.parser) {\n try {\n return config.parser(data);\n } catch (error) {\n throw new Error(`Failed to validate response schema: ${error instanceof Error ? error.message : String(error)}`);\n }\n }\n\n return data as TResponse;\n}\n\n/**\n * Fetches merchant information for a Solana Pay transaction request.\n *\n * Makes a GET request to retrieve the merchant's label and icon, which are displayed\n * to the user before presenting the transaction for signing.\n *\n * @param url - Solana Pay transaction request URL (must be https://)\n * @param options - Optional fetch configuration\n * @returns Merchant label and icon\n * @throws {Error} Invalid URL, HTTP error, or invalid response schema\n *\n * @example\n * ```typescript\n * const { label, icon } = await fetchSolanaPayGetRequest(\n * new URL('https://merchant.example.com/api')\n * );\n * console.log(label); // \"Example Merchant\"\n * console.log(icon); // \"https://merchant.example.com/icon.svg\"\n * ```\n */\nexport async function fetchSolanaPayGetRequest(\n url: URL,\n options?: RequestInit,\n): Promise {\n return fetchSolanaPayRequest(url, {\n method: \"GET\",\n parser: parseSolanaPayGetResponse,\n requestInit: options,\n });\n}\n\n/**\n * Requests a transaction from a Solana Pay merchant endpoint.\n *\n * Makes a POST request with the user's account address. The merchant returns a\n * serialized transaction (unsigned or partially signed) for the wallet to sign.\n *\n * @param url - Solana Pay transaction request URL (must be https://)\n * @param body - Request body containing the user's account address\n * @param options - Optional fetch configuration\n * @returns transaction and optional message\n * @throws {Error} Invalid URL, HTTP error, or invalid response schema\n *\n * @example\n * ```typescript\n * const { transaction, message } = await fetchSolanaPayPostRequest(\n * new URL('https://merchant.example.com/api'),\n * { account: address(\"user123...\") }\n * );\n * // transaction is automatically decoded and deserialized\n * // message is an optional string to display to the user\n * ```\n */\nexport async function fetchSolanaPayPostRequest(\n url: URL,\n body: SolanaPayTransactionRequestPostRequest,\n options?: RequestInit,\n): Promise {\n return fetchSolanaPayRequest(url, {\n method: \"POST\",\n body,\n parser: parseSolanaPayPostResponse,\n requestInit: options,\n });\n}\n\n/**\n * Solana Pay transaction request methods.\n *\n * @property {Function} get - Fetch merchant information (label and icon)\n * @property {Function} post - Request a transaction from the merchant\n *\n * @example\n * ```typescript\n * const { label, icon } = await solanaPayTransactionRequest.get(url);\n * const { transaction } = await solanaPayTransactionRequest.post(url, { account });\n * ```\n */\nexport const solanaPayTransactionRequest = {\n get: fetchSolanaPayGetRequest,\n post: fetchSolanaPayPostRequest,\n};\n","import { address, type Address } from \"gill\";\n// import BigNumber from \"bignumber.js\";\nimport { SOLANA_PAY_PROTOCOL } from \"./constants.js\";\n\n/**\n * A Solana Pay transaction request URL\n */\nexport interface SolanaPayTransactionRequestURL {\n /** `link` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#link) */\n link: URL;\n /** `label` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#label-1) */\n label?: string;\n /** `message` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#message-1) */\n message?: string;\n}\n\n/**\n * A Solana Pay transfer request URL\n */\nexport interface SolanaPayTransferRequestURL {\n /** `recipient` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#recipient) */\n recipient: Address;\n /** `amount` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#amount) */\n amount?: number;\n /** `spl-token` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#spl-token) */\n splToken: Address | undefined;\n /** `reference` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#reference) */\n reference?: Address[];\n /** `label` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#label) */\n label?: string;\n /** `message` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#message) */\n message?: string;\n /** `memo` in the [Solana Pay spec](https://github.com/solana-labs/solana-pay/blob/master/SPEC.md#memo) */\n memo?: string;\n}\n\n/**\n * Thrown when a URL can't be parsed as a Solana Pay URL\n */\nexport class SolanaPayParseURLError extends Error {\n name = \"SolanaPayParseURLError\";\n}\n\n/**\n * Parse a Solana Pay URL as a Transfer Request or Transaction Request\n *\n * @param url - URL to parse\n *\n * @throws {SolanaPayParseURLError}\n */\nexport function parseSolanaPayURL(url: string | URL): SolanaPayTransactionRequestURL | SolanaPayTransferRequestURL {\n if (typeof url === \"string\") {\n if (url.length > 2048) throw new SolanaPayParseURLError(\"length invalid\");\n url = new URL(url);\n }\n\n if (url.protocol !== SOLANA_PAY_PROTOCOL) throw new SolanaPayParseURLError(\"protocol invalid\");\n if (!url.pathname) throw new SolanaPayParseURLError(\"missing pathname\");\n\n return /[:%]/.test(url.pathname) ? parseTransactionRequestURL(url) : parseTransferRequestURL(url);\n}\n\nfunction parseTransactionRequestURL({ pathname, searchParams }: URL): SolanaPayTransactionRequestURL {\n const link = new URL(decodeURIComponent(pathname));\n if (link.protocol !== \"https:\") throw new SolanaPayParseURLError(\"link invalid\");\n\n const label = searchParams.get(\"label\") || undefined;\n const message = searchParams.get(\"message\") || undefined;\n\n return {\n link,\n label,\n message,\n };\n}\n\nfunction parseTransferRequestURL({ pathname, searchParams }: URL): SolanaPayTransferRequestURL {\n let recipient: Address;\n try {\n recipient = address(pathname);\n } catch (error: any) {\n throw new SolanaPayParseURLError(\"recipient invalid\");\n }\n\n let amount: number | undefined;\n const amountParam = searchParams.get(\"amount\");\n if (amountParam != null) {\n if (!/^\\d+(\\.\\d+)?$/.test(amountParam)) throw new SolanaPayParseURLError(\"amount invalid\");\n\n try {\n amount = parseFloat(amountParam);\n } catch (err) {\n throw new SolanaPayParseURLError(\"amount invalid\");\n }\n if (!amount) throw new SolanaPayParseURLError(\"amount invalid\");\n if (Number.isNaN(amount)) throw new SolanaPayParseURLError(\"amount NaN\");\n if (amount < 0) throw new SolanaPayParseURLError(\"amount negative\");\n // 0 is a valid `amount`\n }\n\n let splToken: Address | undefined;\n const splTokenParam = searchParams.get(\"spl-token\");\n if (splTokenParam != null) {\n try {\n splToken = address(splTokenParam);\n } catch (error) {\n throw new SolanaPayParseURLError(\"spl-token invalid\");\n }\n }\n\n let reference: Address[] | undefined;\n const referenceParams = searchParams.getAll(\"reference\");\n if (referenceParams.length) {\n try {\n reference = referenceParams.map((reference) => address(reference));\n } catch (error) {\n throw new SolanaPayParseURLError(\"reference invalid\");\n }\n }\n\n const label = searchParams.get(\"label\") || undefined;\n const message = searchParams.get(\"message\") || undefined;\n const memo = searchParams.get(\"memo\") || undefined;\n\n return {\n recipient,\n amount,\n splToken,\n reference,\n label,\n message,\n memo,\n };\n}\n"]}