fees.ts•2.87 kB
import { Connection, PublicKey } from '@solana/web3.js';
import { Program } from '@project-serum/anchor';
export interface FeeCalculation {
operation: 'capture' | 'release';
amount: number;
tokenFees: {
protocol: number;
project: number;
total: number;
};
solFees: {
protocol: number;
project: number;
total: number;
};
isValid: boolean;
issues: string[];
}
export class FeeService {
private readonly PROTOCOL_TOKEN_FEE_RATE = 0.001; // 0.1%
private readonly PROTOCOL_SOL_FEE = 0.00001; // Fixed SOL fee
constructor(
private connection: Connection,
private program: Program
) {}
async calculateFees(operation: 'capture' | 'release', amount: number): Promise<FeeCalculation> {
const issues: string[] = [];
if (amount <= 0) {
return {
operation,
amount,
tokenFees: { protocol: 0, project: 0, total: 0 },
solFees: { protocol: 0, project: 0, total: 0 },
isValid: false,
issues: ['Amount must be greater than 0']
};
}
// Calculate protocol fees
const protocolTokenFee = amount * this.PROTOCOL_TOKEN_FEE_RATE;
const protocolSolFee = this.PROTOCOL_SOL_FEE;
// Get project fee configuration
let projectTokenFee = 0;
let projectSolFee = 0;
try {
const accounts = operation === 'capture'
? await this.program.account.recipeV1.all()
: await this.program.account.escrowV1.all();
if (accounts.length === 0) {
return {
operation,
amount,
tokenFees: { protocol: 0, project: 0, total: 0 },
solFees: { protocol: 0, project: 0, total: 0 },
isValid: false,
issues: ['No fee configuration found']
};
}
const config = accounts[0].account;
if (operation === 'capture') {
projectTokenFee = config.feeAmountCapture.toNumber() * amount;
projectSolFee = config.solFeeAmountCapture.toNumber();
} else {
projectTokenFee = config.feeAmount.toNumber() * amount;
projectSolFee = config.solFeeAmount.toNumber();
}
} catch (error: any) {
return {
operation,
amount,
tokenFees: { protocol: 0, project: 0, total: 0 },
solFees: { protocol: 0, project: 0, total: 0 },
isValid: false,
issues: [`Failed to fetch project fee configuration: ${error.message}`]
};
}
const tokenTotal = protocolTokenFee + projectTokenFee;
const solTotal = protocolSolFee + projectSolFee;
return {
operation,
amount,
tokenFees: {
protocol: protocolTokenFee,
project: projectTokenFee,
total: tokenTotal
},
solFees: {
protocol: protocolSolFee,
project: projectSolFee,
total: solTotal
},
isValid: true,
issues
};
}
}