@solsdk/tokenflow_sdk/dist/cjs/amm.cjs.map

A simple SDK for interacting with tokenflow

{"version":3,"file":"amm.cjs","sources":["../../../src/amm.ts"],"sourcesContent":["import { BondingCurveAccount } from \"./bondingCurveAccount\";\nimport { GlobalAccount } from \"./globalAccount\";\n\nexport type BuyResult = {\n    token_amount: bigint;\n    sol_amount: bigint;\n};\n\nexport type SellResult = {\n    token_amount: bigint;\n    sol_amount: bigint;\n};\n\nexport class AMM {\n    public virtualSolReserves: bigint;\n    public virtualTokenReserves: bigint;\n    public realSolReserves: bigint;\n    public realTokenReserves: bigint;\n    public initialVirtualTokenReserves: bigint;\n\n    constructor(\n        virtualSolReserves: bigint,\n        virtualTokenReserves: bigint,\n        realSolReserves: bigint,\n        realTokenReserves: bigint,\n        initialVirtualTokenReserves: bigint\n    ) {\n        this.virtualSolReserves = virtualSolReserves;\n        this.virtualTokenReserves = virtualTokenReserves;\n        this.realSolReserves = realSolReserves;\n        this.realTokenReserves = realTokenReserves;\n        this.initialVirtualTokenReserves = initialVirtualTokenReserves;\n    }\n\n    static fromGlobalAccount(global: GlobalAccount): AMM {\n        return new AMM(\n            global.initialVirtualSolReserves,\n            global.initialVirtualTokenReserves,\n            0n,\n            global.initialRealTokenReserves,\n            global.initialVirtualTokenReserves\n        );\n    }\n\n    static fromBondingCurveAccount(bonding_curve: BondingCurveAccount, initialVirtualTokenReserves: bigint): AMM {\n        return new AMM(\n            bonding_curve.virtualSolReserves,\n            bonding_curve.virtualTokenReserves,\n            bonding_curve.realSolReserves,\n            bonding_curve.realTokenReserves,\n            initialVirtualTokenReserves\n        );\n    }\n\n    getBuyPrice(tokens: bigint): bigint {\n        const product_of_reserves = this.virtualSolReserves * this.virtualTokenReserves;\n        const new_virtual_token_reserves = this.virtualTokenReserves - tokens;\n        const new_virtual_sol_reserves = product_of_reserves / new_virtual_token_reserves + 1n;\n        const amount_needed = new_virtual_sol_reserves > this.virtualSolReserves ? new_virtual_sol_reserves - this.virtualSolReserves : 0n;\n        return amount_needed > 0n ? amount_needed : 0n;\n    }\n\n    applyBuy(token_amount: bigint): BuyResult {\n        const final_token_amount = token_amount > this.realTokenReserves ? this.realTokenReserves : token_amount;\n        const sol_amount = this.getBuyPrice(final_token_amount);\n\n        this.virtualTokenReserves = this.virtualTokenReserves - final_token_amount;\n        this.realTokenReserves = this.realTokenReserves - final_token_amount;\n\n        this.virtualSolReserves = this.virtualSolReserves + sol_amount;\n        this.realSolReserves = this.realSolReserves + sol_amount;\n\n        return {\n            token_amount: final_token_amount,\n            sol_amount: sol_amount\n        }\n    }\n\n    applySell(token_amount: bigint): SellResult {\n        this.virtualTokenReserves = this.virtualTokenReserves + token_amount;\n        this.realTokenReserves = this.realTokenReserves + token_amount;\n\n        const sell_price = this.getSellPrice(token_amount);\n\n        this.virtualSolReserves = this.virtualSolReserves - sell_price;\n        this.realSolReserves = this.realSolReserves - sell_price;\n\n        return {\n            token_amount: token_amount,\n            sol_amount: sell_price\n        }\n    }\n\n    getSellPrice(tokens: bigint): bigint {\n        const scaling_factor = this.initialVirtualTokenReserves;\n        console.log('scaling_factor: ', scaling_factor);\n        const token_sell_proportion = (tokens * scaling_factor) / this.virtualTokenReserves;\n        console.log('token_sell_proportion: ', token_sell_proportion);\n        const sol_received = (this.virtualSolReserves * token_sell_proportion) / scaling_factor;\n        console.log('sol_received: ', sol_received);\n        console.log('realSolReserves: ', this.realSolReserves);\n        return sol_received < this.realSolReserves ? 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