@mutants/cardano-tx-builder/dist/calculateChange.js

A package that provides utility functions to build and destructure a cardano transaction

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.calculateChange = void 0;
const valueBuilder_1 = require("./valueBuilder");
const valueToAssetList_1 = require("./valueToAssetList");
const calculateChangeBasedOnRequiredValue = (inputs, required) => {
    const valueBuilder = new valueBuilder_1.ValueBuilder();
    valueBuilder.loadValues(required);
    for (const input of inputs) {
        valueBuilder.addAsset("lovelace", -BigInt(input.value.coin));
        if (input.value.assets) {
            for (const policyId of Object.keys(input.value.assets)) {
                for (const assetName of Object.keys(input.value.assets[policyId])) {
                    const quantity = input.value.assets[policyId][assetName];
                    valueBuilder.addAsset(`${policyId}${assetName}`, -quantity);
                }
            }
        }
    }
    valueBuilder.abs();
    return valueBuilder.build();
};
const calculateChange = (inputs, outputs) => {
    const totalOutputValue = outputs.reduce((valueBuilder, output) => {
        valueBuilder.addValue(output.value);
        return valueBuilder;
    }, new valueBuilder_1.ValueBuilder());
    return calculateChangeBasedOnRequiredValue(inputs, (0, valueToAssetList_1.valueToAssetList)(totalOutputValue.build()));
};
exports.calculateChange = calculateChange;