web3agent-aof/dist/src/gas/optimizer.js

AI Framework for Onchain Operations and DeFi Interactions

export class GasOptimizer {
    provider;
    currentStrategy;
    constructor(provider) {
        this.provider = provider;
        this.currentStrategy = this.getDefaultStrategy();
    }
    getDefaultStrategy() {
        return {
            type: 'moderate',
            maxPriorityFee: BigInt(2000000000), // 2 Gwei
            maxFeePerGas: BigInt(40000000000), // 40 Gwei
            flashbotsEnabled: false
        };
    }
    async setStrategy(type) {
        const strategies = {
            aggressive: {
                type: 'aggressive',
                maxPriorityFee: BigInt(3000000000), // 3 Gwei
                maxFeePerGas: BigInt(50000000000), // 50 Gwei
                flashbotsEnabled: true
            },
            moderate: this.getDefaultStrategy(),
            safe: {
                type: 'safe',
                maxPriorityFee: BigInt(1500000000), // 1.5 Gwei
                maxFeePerGas: BigInt(30000000000), // 30 Gwei
                flashbotsEnabled: false
            }
        };
        this.currentStrategy = strategies[type];
    }
    async estimateGas(tx) {
        const [baseFee, priorityFee] = await Promise.all([
            this.provider.getFeeData(),
            this.estimatePriorityFee()
        ]);
        const maxPriorityFee = priorityFee > this.currentStrategy.maxPriorityFee
            ? this.currentStrategy.maxPriorityFee
            : priorityFee;
        const maxFeePerGas = baseFee.maxFeePerGas || BigInt(0);
        const estimatedGas = await this.provider.estimateGas(tx);
        const estimatedCost = maxFeePerGas * estimatedGas;
        return {
            maxFeePerGas,
            maxPriorityFeePerGas: maxPriorityFee,
            estimatedGas,
            estimatedCost
        };
    }
    async simulateTransaction(tx) {
        try {
            const result = await this.provider.call(tx);
            return {
                success: true,
                gasUsed: BigInt(0), // Actual gas used would come from trace_call
                returnValue: result,
                logs: [] // Actual logs would come from trace_call
            };
        }
        catch (error) {
            return {
                success: false,
                gasUsed: BigInt(0),
                returnValue: '0x',
                logs: [],
                error: error.message
            };
        }
    }
    async estimatePriorityFee() {
        const feeHistory = await this.provider.send('eth_feeHistory', [
            4,
            'latest',
            [25, 50, 75]
        ]);
        const rewards = feeHistory.reward.map((block) => BigInt(block[1]));
        const medianPriorityFee = rewards.sort((a, b) => {
            return a < b ? -1 : a > b ? 1 : 0;
        })[Math.floor(rewards.length / 2)];
        return medianPriorityFee;
    }
    async enableMEVProtection() {
        // Implementation would integrate with Flashbots
        this.currentStrategy.flashbotsEnabled = true;
    }
    async optimizeGasPrice(baseGasPrice) {
        const networkCongestion = await this.getNetworkCongestion();
        let multiplier = 1.0;
        switch (networkCongestion) {
            case 'high':
                multiplier = 1.2;
                break;
            case 'medium':
                multiplier = 1.1;
                break;
            case 'low':
                multiplier = 1.0;
                break;
        }
        return BigInt(Math.floor(Number(baseGasPrice) * multiplier));
    }
    async getNetworkCongestion() {
        const block = await this.provider.getBlock('latest');
        if (!block)
            return 'medium';
        const gasUsed = Number(block.gasUsed);
        const gasLimit = Number(block.gasLimit);
        const utilization = gasUsed / gasLimit;
        if (utilization > 0.8)
            return 'high';
        if (utilization > 0.5)
            return 'medium';
        return 'low';
    }
}
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