{"version":3,"sources":["../src/bridge.ts"],"sourcesContent":["/**\n * Core bridge utilities — shared between x402 and MPP clients.\n *\n * Auto-discovers bridge info from the RelAI API and provides helpers\n * for executing cross-chain payments transparently.\n *\n * Usage (MPP):\n * ```ts\n * import { evmChargeWithBridge } from '@relai-fi/x402/mpp/with-bridge'\n * ```\n *\n * Usage (x402):\n * ```ts\n * import { createX402Client } from '@relai-fi/x402'\n * const client = createX402Client({ ..., bridge: { enabled: true } })\n * ```\n */\n\nconst RELAI_API_BASE = 'https://api.relai.fi'\n\nexport interface BridgeInfo {\n settleEndpoint: string\n supportedSourceChains: string[]\n supportedSourceAssets: string[]\n payTo: Record\n feePayerSvm: string | null\n feeBps: number\n paymentFacilitator: string\n}\n\nexport interface BridgeSettleRequest {\n /** x402 mode: base64-encoded payment header */\n sourcePayment?: string\n /** MPP mode: source tx hash */\n sourceTxHash?: string\n /** MPP mode: wallet address that sent the source tx */\n senderAddress?: string\n /** MPP mode: signature of (sourceTxHash + JSON(targetAccept)) */\n senderSignature?: string\n /** CAIP-2 source chain identifier */\n sourceChain: string\n targetAccept: {\n scheme: 'exact'\n network: string\n asset: string\n payTo: string\n amount: string\n }\n /** x402 payment requirements (full 402 body) — needed by settle for x402 flow */\n requirements?: any\n resource?: string\n paymentFacilitator?: string | null\n}\n\nexport interface BridgeSettleResponse {\n success?: boolean\n targetTxId?: string\n sourceTxId?: string\n /** x402 payment header (returned by x402-flavored settle) */\n xPayment?: string\n}\n\n// ── Cache (keyed by base URL) ──────────────────────────────────────────\n\nconst _cacheMap = new Map()\nconst CACHE_TTL = 5 * 60 * 1000 // 5 minutes\n\n/**\n * Fetch bridge info from the RelAI API (cached per base URL for 5 minutes).\n */\nexport async function getBridgeInfo(baseUrl = RELAI_API_BASE): Promise {\n const key = baseUrl.replace(/\\/$/, '')\n const now = Date.now()\n const cached = _cacheMap.get(key)\n if (cached && now - cached.time < CACHE_TTL) return cached.info\n\n const url = `${key}/bridge/info`\n const res = await fetch(url)\n if (!res.ok) {\n if (cached) return cached.info // stale cache better than failure\n throw new Error(`[relai:bridge] Failed to fetch ${url}: ${res.status}`)\n }\n\n const data = (await res.json()) as any\n const info: BridgeInfo = {\n settleEndpoint: data.settleEndpoint,\n supportedSourceChains: data.supportedSourceChains || [],\n supportedSourceAssets: data.supportedSourceAssets || [],\n payTo: data.payTo || {},\n feePayerSvm: data.feePayerSvm ?? null,\n feeBps: data.feeBps ?? 100,\n paymentFacilitator: data.paymentFacilitator || 'https://facilitator.x402.fi',\n }\n _cacheMap.set(key, { info, time: now })\n return info\n}\n\n/**\n * Call the bridge settle endpoint.\n */\nexport async function settleBridge(\n settleEndpoint: string,\n body: BridgeSettleRequest,\n): Promise {\n const res = await fetch(settleEndpoint, {\n method: 'POST',\n headers: { 'Content-Type': 'application/json' },\n body: JSON.stringify(body),\n })\n\n if (!res.ok) {\n const err = (await res.json().catch(() => ({}))) as any\n throw new Error(`[relai:bridge] settle failed: ${err.error || res.status}${err.details ? ' — ' + err.details : ''}`)\n }\n\n return res.json() as Promise\n}\n\n/**\n * Select a source chain from supported chains that matches the available wallet.\n */\nexport function selectSourceChain(\n supportedChains: string[],\n hasEvmWallet: boolean,\n hasSolanaWallet: boolean,\n preferredSourceChainId?: number,\n): { type: 'evm' | 'solana'; chain: string } | null {\n // If a specific source chain is preferred, try it first\n if (preferredSourceChainId && hasEvmWallet) {\n const preferred = `eip155:${preferredSourceChainId}`\n if (supportedChains.includes(preferred)) {\n return { type: 'evm', chain: preferred }\n }\n }\n\n // Solana first (lower fees)\n if (hasSolanaWallet) {\n const sol = supportedChains.find((c) => c.startsWith('solana:'))\n if (sol) return { type: 'solana', chain: sol }\n }\n\n // Then any EVM chain\n if (hasEvmWallet) {\n for (const chain of supportedChains) {\n if (chain.startsWith('eip155:')) {\n return { type: 'evm', chain }\n }\n }\n }\n\n return null\n}\n\n/**\n * Compute source amount including bridge fee.\n */\nexport function computeSourceAmount(targetAmount: bigint, feeBps: number): bigint {\n const fee = (targetAmount * BigInt(feeBps)) / 10000n\n return targetAmount + fee\n}\n\n// Known EVM RPC URLs (fallback)\nexport const DEFAULT_EVM_RPC: Record = {\n 'eip155:8453': 'https://mainnet.base.org',\n 'eip155:137': 'https://polygon-rpc.com',\n 'eip155:1': 'https://eth.llamarpc.com',\n 'eip155:42161': 'https://arb1.arbitrum.io/rpc',\n 'eip155:43114': 'https://api.avax.network/ext/bc/C/rpc',\n 'eip155:1187947933': 'https://skale-base.skalenodes.com/v1/base',\n}\n"],"mappings":";;;;;;;;;;;;;;;;;;;;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAkBA,IAAM,iBAAiB;AA8CvB,IAAM,YAAY,oBAAI,IAAgD;AACtE,IAAM,YAAY,IAAI,KAAK;AAK3B,eAAsB,cAAc,UAAU,gBAAqC;AACjF,QAAM,MAAM,QAAQ,QAAQ,OAAO,EAAE;AACrC,QAAM,MAAM,KAAK,IAAI;AACrB,QAAM,SAAS,UAAU,IAAI,GAAG;AAChC,MAAI,UAAU,MAAM,OAAO,OAAO,UAAW,QAAO,OAAO;AAE3D,QAAM,MAAM,GAAG,GAAG;AAClB,QAAM,MAAM,MAAM,MAAM,GAAG;AAC3B,MAAI,CAAC,IAAI,IAAI;AACX,QAAI,OAAQ,QAAO,OAAO;AAC1B,UAAM,IAAI,MAAM,kCAAkC,GAAG,KAAK,IAAI,MAAM,EAAE;AAAA,EACxE;AAEA,QAAM,OAAQ,MAAM,IAAI,KAAK;AAC7B,QAAM,OAAmB;AAAA,IACvB,gBAAgB,KAAK;AAAA,IACrB,uBAAuB,KAAK,yBAAyB,CAAC;AAAA,IACtD,uBAAuB,KAAK,yBAAyB,CAAC;AAAA,IACtD,OAAO,KAAK,SAAS,CAAC;AAAA,IACtB,aAAa,KAAK,eAAe;AAAA,IACjC,QAAQ,KAAK,UAAU;AAAA,IACvB,oBAAoB,KAAK,sBAAsB;AAAA,EACjD;AACA,YAAU,IAAI,KAAK,EAAE,MAAM,MAAM,IAAI,CAAC;AACtC,SAAO;AACT;AAKA,eAAsB,aACpB,gBACA,MAC+B;AAC/B,QAAM,MAAM,MAAM,MAAM,gBAAgB;AAAA,IACtC,QAAQ;AAAA,IACR,SAAS,EAAE,gBAAgB,mBAAmB;AAAA,IAC9C,MAAM,KAAK,UAAU,IAAI;AAAA,EAC3B,CAAC;AAED,MAAI,CAAC,IAAI,IAAI;AACX,UAAM,MAAO,MAAM,IAAI,KAAK,EAAE,MAAM,OAAO,CAAC,EAAE;AAC9C,UAAM,IAAI,MAAM,iCAAiC,IAAI,SAAS,IAAI,MAAM,GAAG,IAAI,UAAU,aAAQ,IAAI,UAAU,EAAE,EAAE;AAAA,EACrH;AAEA,SAAO,IAAI,KAAK;AAClB;AAKO,SAAS,kBACd,iBACA,cACA,iBACA,wBACkD;AAElD,MAAI,0BAA0B,cAAc;AAC1C,UAAM,YAAY,UAAU,sBAAsB;AAClD,QAAI,gBAAgB,SAAS,SAAS,GAAG;AACvC,aAAO,EAAE,MAAM,OAAO,OAAO,UAAU;AAAA,IACzC;AAAA,EACF;AAGA,MAAI,iBAAiB;AACnB,UAAM,MAAM,gBAAgB,KAAK,CAAC,MAAM,EAAE,WAAW,SAAS,CAAC;AAC/D,QAAI,IAAK,QAAO,EAAE,MAAM,UAAU,OAAO,IAAI;AAAA,EAC/C;AAGA,MAAI,cAAc;AAChB,eAAW,SAAS,iBAAiB;AACnC,UAAI,MAAM,WAAW,SAAS,GAAG;AAC/B,eAAO,EAAE,MAAM,OAAO,MAAM;AAAA,MAC9B;AAAA,IACF;AAAA,EACF;AAEA,SAAO;AACT;AAKO,SAAS,oBAAoB,cAAsB,QAAwB;AAChF,QAAM,MAAO,eAAe,OAAO,MAAM,IAAK;AAC9C,SAAO,eAAe;AACxB;AAGO,IAAM,kBAA0C;AAAA,EACrD,eAAe;AAAA,EACf,cAAc;AAAA,EACd,YAAY;AAAA,EACZ,gBAAgB;AAAA,EAChB,gBAAgB;AAAA,EAChB,qBAAqB;AACvB;","names":[]}