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| 1 | +import type { Output } from "@bitauth/libauth"; |
| 2 | +import type { ExtensionRegistry, ElectrumClient } from "./types"; |
| 3 | +import type { IdentitySnapshot } from "../bcmr-v2.schema"; |
| 4 | + |
| 5 | +// Import extension handlers |
| 6 | +import { fetchLoanState } from "./parityusd"; |
| 7 | + |
| 8 | +/** |
| 9 | + * Registry of all available extensions |
| 10 | + */ |
| 11 | +export const extensions: ExtensionRegistry = { |
| 12 | + parityusd: { |
| 13 | + fetchLoanState, |
| 14 | + }, |
| 15 | +}; |
| 16 | + |
| 17 | +/** |
| 18 | + * Invoke extensions declared in a BCMR identity |
| 19 | + * |
| 20 | + * Extensions are called in order and can modify the UTXO before NFT parsing. |
| 21 | + * Common use case: Fetch on-chain data and transplant into UTXO commitment. |
| 22 | + * |
| 23 | + * @param utxo - The UTXO to process |
| 24 | + * @param identitySnapshot - BCMR identity snapshot containing extensions config |
| 25 | + * @param electrumClient - Electrum client for blockchain data fetching |
| 26 | + * @param networkPrefix - Network prefix ("bitcoincash" or "bchtest") |
| 27 | + * @param extensionsEnabled - Optional map of extension names to enabled status |
| 28 | + * @returns Modified UTXO with extension processing applied |
| 29 | + */ |
| 30 | +export async function invokeExtensions( |
| 31 | + utxo: Output, |
| 32 | + identitySnapshot: IdentitySnapshot, |
| 33 | + electrumClient: ElectrumClient, |
| 34 | + networkPrefix: string, |
| 35 | + extensionsEnabled?: Record<string, boolean>, |
| 36 | +): Promise<Output> { |
| 37 | + if (!identitySnapshot.extensions) { |
| 38 | + return utxo; |
| 39 | + } |
| 40 | + |
| 41 | + let modifiedUtxo = utxo; |
| 42 | + |
| 43 | + // Iterate through all extensions in the identity |
| 44 | + for (const [extensionName, extensionConfig] of Object.entries( |
| 45 | + identitySnapshot.extensions, |
| 46 | + )) { |
| 47 | + // Check if this extension is enabled (default to true if not specified) |
| 48 | + const isEnabled = extensionsEnabled?.[extensionName] ?? true; |
| 49 | + if (!isEnabled) { |
| 50 | + console.log(`Extension ${extensionName} is disabled, skipping`); |
| 51 | + continue; |
| 52 | + } |
| 53 | + |
| 54 | + const extensionHandlers = extensions[extensionName]; |
| 55 | + if (!extensionHandlers) { |
| 56 | + console.warn(`Unknown extension: ${extensionName}`); |
| 57 | + continue; |
| 58 | + } |
| 59 | + |
| 60 | + // Iterate through all methods in this extension |
| 61 | + for (const methodName of Object.keys(extensionConfig as object)) { |
| 62 | + const handler = extensionHandlers[methodName]; |
| 63 | + if (!handler) { |
| 64 | + console.warn( |
| 65 | + `Unknown method ${methodName} in extension ${extensionName}`, |
| 66 | + ); |
| 67 | + continue; |
| 68 | + } |
| 69 | + |
| 70 | + console.log( |
| 71 | + `Invoking extension: ${extensionName}.${methodName}`, |
| 72 | + ); |
| 73 | + |
| 74 | + try { |
| 75 | + modifiedUtxo = await handler( |
| 76 | + modifiedUtxo, |
| 77 | + identitySnapshot, |
| 78 | + electrumClient, |
| 79 | + networkPrefix, |
| 80 | + ); |
| 81 | + } catch (error) { |
| 82 | + console.error( |
| 83 | + `Error invoking extension ${extensionName}.${methodName}:`, |
| 84 | + error, |
| 85 | + ); |
| 86 | + // Continue with unmodified UTXO on error |
| 87 | + } |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + return modifiedUtxo; |
| 92 | +} |
| 93 | + |
| 94 | +// Re-export types for convenience |
| 95 | +export type { |
| 96 | + ElectrumClient, |
| 97 | + ElectrumUtxo, |
| 98 | + ExtensionHandler, |
| 99 | +} from "./types"; |
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