smom-dbis-138/services/liquidity-engine/tokenization-support.ts

/**
 * @file tokenization-support.ts
 * @notice Tokenized asset liquidity management
 */

import { LiquidityEngineService, Quote, RoutingDecision } from './liquidity-engine.service';
import { TokenRegistry } from '../../contracts/tokenization/TokenRegistry';

export interface TokenizedAssetLiquidity {
    tokenAddress: string;
    fabricTokenId: string;
    totalLiquidity: string;
    availableLiquidity: string;
    reservePool: string;
    bridgeLiquidity: string;
    lastUpdated: number;
}

export class TokenizationLiquidityIntegration {
    private liquidityEngine: LiquidityEngineService;
    private tokenRegistry: TokenRegistry;

    constructor(
        liquidityEngine: LiquidityEngineService,
        tokenRegistry: TokenRegistry
    ) {
        this.liquidityEngine = liquidityEngine;
        this.tokenRegistry = tokenRegistry;
    }

    /**
     * Get liquidity for tokenized asset
     */
    async getTokenizedAssetLiquidity(tokenAddress: string): Promise<TokenizedAssetLiquidity> {
        // Get token metadata
        const tokenMetadata = await this.tokenRegistry.getToken(tokenAddress);

        // Get reserve pool balance
        const reservePool = await this.getReservePoolBalance(tokenMetadata.backingReserve);

        // Get bridge liquidity (from bridge reserve service)
        const bridgeLiquidity = await this.getBridgeLiquidity(tokenAddress);

        // Calculate available liquidity
        const totalLiquidity = BigInt(tokenMetadata.totalSupply);
        const availableLiquidity = totalLiquidity - BigInt(reservePool);

        return {
            tokenAddress,
            fabricTokenId: tokenMetadata.tokenId,
            totalLiquidity: totalLiquidity.toString(),
            availableLiquidity: availableLiquidity.toString(),
            reservePool,
            bridgeLiquidity,
            lastUpdated: Date.now()
        };
    }

    /**
     * Get quote for tokenized asset swap
     */
    async getTokenizedAssetQuote(
        tokenIn: string,
        tokenOut: string,
        amountIn: string
    ): Promise<Quote> {
        // Check if tokens are tokenized assets
        const tokenInMetadata = await this.tokenRegistry.getToken(tokenIn);
        const tokenOutMetadata = await this.tokenRegistry.getToken(tokenOut);

        // If both are tokenized and same underlying asset, return 1:1 quote
        if (tokenInMetadata.underlyingAsset === tokenOutMetadata.underlyingAsset) {
            return {
                provider: 0, // UniswapV3
                amountOut: BigInt(amountIn),
                slippage: 0,
                gasEstimate: BigInt(100000),
                confidence: 100,
                route: [tokenIn, tokenOut]
            };
        }

        // Otherwise, use standard liquidity engine
        return await this.liquidityEngine.getQuote(tokenIn, tokenOut, BigInt(amountIn));
    }

    /**
     * Manage reserve pool for tokenized asset
     */
    async manageReservePool(
        tokenAddress: string,
        operation: 'add' | 'remove',
        amount: string
    ): Promise<{ success: boolean; newBalance: string }> {
        const tokenMetadata = await this.tokenRegistry.getToken(tokenAddress);
        
        // In production, this would interact with reserve manager chaincode
        // For now, return placeholder
        return {
            success: true,
            newBalance: amount
        };
    }

    /**
     * Get reserve pool balance
     */
    private async getReservePoolBalance(reserveId: string): Promise<string> {
        // In production, query Fabric reserve manager chaincode
        // For now, return placeholder
        return '0';
    }

    /**
     * Get bridge liquidity
     */
    private async getBridgeLiquidity(tokenAddress: string): Promise<string> {
        // In production, query bridge reserve service
        // For now, return placeholder
        return '0';
    }

    /**
     * Check if sufficient liquidity for bridge transfer
     */
    async checkBridgeLiquidity(
        tokenAddress: string,
        amount: string,
        destinationChainId: number
    ): Promise<{ sufficient: boolean; available: string; required: string }> {
        const liquidity = await this.getTokenizedAssetLiquidity(tokenAddress);
        const required = BigInt(amount);
        const available = BigInt(liquidity.bridgeLiquidity);

        return {
            sufficient: available >= required,
            available: available.toString(),
            required: required.toString()
        };
    }
}