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{ BaseController } from '@metamask/base-controller';\nimport type { TransactionMeta } from '@metamask/transaction-controller';\nimport type { Hex } from '@metamask/utils';\nimport type { Draft } from 'immer';\nimport { noop } from 'lodash';\n\nimport { updatePaymentToken } from './actions/update-payment-token';\nimport { CONTROLLER_NAME, TransactionPayStrategy } from './constants';\nimport type {\n TransactionData,\n TransactionPayControllerMessenger,\n TransactionPayControllerOptions,\n TransactionPayControllerState,\n} from './types';\nimport { queueRefreshQuotes, updateQuotes } from './utils/quotes';\nimport { updateSourceAmounts } from './utils/source-amounts';\nimport { pollTransactionChanges } from './utils/transaction';\n\nconst stateMetadata = {\n transactionData: { persist: false, anonymous: false },\n};\n\nconst getDefaultState = () => ({\n transactionData: {},\n});\n\nexport class TransactionPayController extends BaseController<\n typeof CONTROLLER_NAME,\n TransactionPayControllerState,\n TransactionPayControllerMessenger\n> {\n readonly #getStrategy?: (\n transaction: TransactionMeta,\n ) => Promise;\n\n constructor({\n getStrategy,\n messenger,\n state,\n }: TransactionPayControllerOptions) {\n super({\n name: CONTROLLER_NAME,\n metadata: stateMetadata,\n messenger,\n state: { ...getDefaultState(), ...state },\n });\n\n this.#getStrategy = getStrategy;\n\n this.#registerActionHandlers();\n\n pollTransactionChanges(\n messenger,\n this.#updateTransactionData.bind(this),\n this.#removeTransactionData.bind(this),\n );\n\n queueRefreshQuotes(messenger, this.#updateTransactionData.bind(this));\n }\n\n updatePaymentToken({\n transactionId,\n tokenAddress,\n chainId,\n }: {\n transactionId: string;\n tokenAddress: Hex;\n chainId: Hex;\n }) {\n updatePaymentToken(\n { transactionId, tokenAddress, chainId },\n {\n messenger: this.messagingSystem,\n updateTransactionData: this.#updateTransactionData.bind(this),\n },\n );\n }\n\n #removeTransactionData(transactionId: string) {\n this.update((state) => {\n delete state.transactionData[transactionId];\n });\n }\n\n #updateTransactionData(\n transactionId: string,\n fn: (transactionData: Draft) => void,\n ) {\n let shouldUpdateQuotes = false;\n\n this.update((state) => {\n const { transactionData } = state;\n let current = transactionData[transactionId];\n const originalPaymentToken = current?.paymentToken;\n const originalTokens = current?.tokens;\n\n if (!current) {\n transactionData[transactionId] = {\n isLoading: false,\n tokens: [],\n };\n\n current = transactionData[transactionId];\n }\n\n fn(current);\n\n const isPaymentTokenUpdated =\n current.paymentToken !== originalPaymentToken;\n\n const isTokensUpdated = current.tokens !== originalTokens;\n\n if (isPaymentTokenUpdated || isTokensUpdated) {\n updateSourceAmounts(\n transactionId,\n current as never,\n this.messagingSystem,\n );\n\n shouldUpdateQuotes = true;\n current.isLoading = true;\n }\n });\n\n if (shouldUpdateQuotes) {\n updateQuotes({\n messenger: this.messagingSystem,\n transactionData: this.state.transactionData[transactionId],\n transactionId,\n updateTransactionData: this.#updateTransactionData.bind(this),\n }).catch(noop);\n }\n }\n\n #registerActionHandlers() {\n this.messagingSystem.registerActionHandler(\n 'TransactionPayController:getStrategy',\n this.#getStrategy ?? (async () => TransactionPayStrategy.Relay),\n );\n }\n}\n"]}