{"version":3,"sources":["../../src/exact/v1/client/scheme.ts"],"sourcesContent":["import {\n  getSetComputeUnitLimitInstruction,\n  setTransactionMessageComputeUnitPrice,\n} from \"@solana-program/compute-budget\";\nimport { TOKEN_PROGRAM_ADDRESS } from \"@solana-program/token\";\nimport {\n  fetchMint,\n  findAssociatedTokenPda,\n  getTransferCheckedInstruction,\n  TOKEN_2022_PROGRAM_ADDRESS,\n} from \"@solana-program/token-2022\";\nimport {\n  appendTransactionMessageInstructions,\n  createTransactionMessage,\n  getBase64EncodedWireTransaction,\n  partiallySignTransactionMessageWithSigners,\n  pipe,\n  prependTransactionMessageInstruction,\n  setTransactionMessageFeePayer,\n  setTransactionMessageLifetimeUsingBlockhash,\n  type Address,\n} from \"@solana/kit\";\nimport type {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport type { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport {\n  DEFAULT_COMPUTE_UNIT_LIMIT,\n  DEFAULT_COMPUTE_UNIT_PRICE_MICROLAMPORTS,\n  MEMO_PROGRAM_ADDRESS,\n} from \"../../../constants\";\nimport type { ClientSvmConfig, ClientSvmSigner } from \"../../../signer\";\nimport type { ExactSvmPayloadV1 } from \"../../../types\";\nimport { createRpcClient } from \"../../../utils\";\n\n/**\n * SVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactSvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactSvmClientV1 instance.\n   *\n   * @param signer - The SVM signer for client operations\n   * @param config - Optional configuration with custom RPC URL\n   * @returns ExactSvmClientV1 instance\n   */\n  constructor(\n    private readonly signer: ClientSvmSigner,\n    private readonly config?: ClientSvmConfig,\n  ) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const rpc = createRpcClient(selectedV1.network, this.config?.rpcUrl);\n\n    const tokenMint = await fetchMint(rpc, selectedV1.asset as Address);\n    const tokenProgramAddress = tokenMint.programAddress;\n\n    if (\n      tokenProgramAddress.toString() !== TOKEN_PROGRAM_ADDRESS.toString() &&\n      tokenProgramAddress.toString() !== TOKEN_2022_PROGRAM_ADDRESS.toString()\n    ) {\n      throw new Error(\"Asset was not created by a known token program\");\n    }\n\n    const [sourceATA] = await findAssociatedTokenPda({\n      mint: selectedV1.asset as Address,\n      owner: this.signer.address,\n      tokenProgram: tokenProgramAddress,\n    });\n\n    const [destinationATA] = await findAssociatedTokenPda({\n      mint: selectedV1.asset as Address,\n      owner: selectedV1.payTo as Address,\n      tokenProgram: tokenProgramAddress,\n    });\n\n    const transferIx = getTransferCheckedInstruction(\n      {\n        source: sourceATA,\n        mint: selectedV1.asset as Address,\n        destination: destinationATA,\n        authority: this.signer,\n        amount: BigInt(selectedV1.maxAmountRequired),\n        decimals: tokenMint.data.decimals,\n      },\n      { programAddress: tokenProgramAddress },\n    );\n\n    // Facilitator must provide feePayer to cover transaction fees\n    const feePayer = selectedV1.extra?.feePayer as Address;\n    if (!feePayer) {\n      throw new Error(\"feePayer is required in paymentRequirements.extra for SVM transactions\");\n    }\n\n    const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();\n\n    const nonce = crypto.getRandomValues(new Uint8Array(16));\n    const memoIx = {\n      programAddress: MEMO_PROGRAM_ADDRESS as Address,\n      accounts: [] as const,\n      data: new TextEncoder().encode(\n        Array.from(nonce)\n          .map(b => b.toString(16).padStart(2, \"0\"))\n          .join(\"\"),\n      ),\n    };\n\n    const tx = pipe(\n      createTransactionMessage({ version: 0 }),\n      tx => setTransactionMessageComputeUnitPrice(DEFAULT_COMPUTE_UNIT_PRICE_MICROLAMPORTS, tx),\n      tx => setTransactionMessageFeePayer(feePayer, tx),\n      tx =>\n        prependTransactionMessageInstruction(\n          getSetComputeUnitLimitInstruction({ units: DEFAULT_COMPUTE_UNIT_LIMIT }),\n          tx,\n        ),\n      tx => appendTransactionMessageInstructions([transferIx, memoIx], tx),\n      tx => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),\n    );\n\n    const signedTransaction = await partiallySignTransactionMessageWithSigners(tx);\n    const base64EncodedWireTransaction = getBase64EncodedWireTransaction(signedTransaction);\n\n    const payload: ExactSvmPayloadV1 = {\n      transaction: base64EncodedWireTransaction,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  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