swapnet-sdk-test-1/dist/utils.js

TypeScript SDK for SwapNet API.

import { arrayify, joinSignature, splitSignature } from '@ethersproject/bytes';
import { CommandType } from "./routers/universalRouter/routerCommands.js";
export const toNodeType = (tokenOp)=>{
    const { fromSwaps, toSwaps } = tokenOp;
    if (fromSwaps.length === 0 && toSwaps.length === 0) {
        throw new Error(`Invalid TokenOperation node!`);
    }
    if (fromSwaps.length === 0) {
        return 'SOURCE';
    }
    if (toSwaps.length === 0) {
        return 'DESTINATION';
    }
    if (toSwaps.length === 1) {
        if (fromSwaps.length === 1) {
            return 'PASSING_THROUGH';
        }
        return 'MERGING';
    }
    return 'FORKING';
};
export const toAmountOutMinimum = (amountOut, slippageTolerance)=>{
    const slippageToleranceMillionth = BigInt(Math.floor(slippageTolerance * 10 ** 6));
    const oneMillion = BigInt(10 ** 6);
    return amountOut * (oneMillion - slippageToleranceMillionth) / oneMillion;
};
export const fromTokenUnits = (tokenUnits, decimals)=>{
    return 10n ** BigInt(decimals) * BigInt(Math.round(tokenUnits * 1e18)) / BigInt(1e18);
};
export const toTokenUnits = (tokenAmount, decimals)=>{
    return Number(tokenAmount * 10n ** 9n) / 10 ** (decimals + 9);
};
const SIGNATURE_LENGTH = 65;
const EIP_2098_SIGNATURE_LENGTH = 64;
export function encodePermit(planner, permit2) {
    let signature = permit2.signature;
    const length = arrayify(permit2.signature).length;
    // signature data provided for EIP-1271 may have length different from ECDSA signature
    if (length === SIGNATURE_LENGTH || length === EIP_2098_SIGNATURE_LENGTH) {
        // sanitizes signature to cover edge cases of malformed EIP-2098 sigs and v used as recovery id
        signature = joinSignature(splitSignature(permit2.signature));
    }
    planner.addCommand(CommandType.PERMIT2_PERMIT, [
        permit2,
        signature
    ]);
}