ton-assembly/dist/trace/logs.js

TON assembler and disassembler

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseLogs = parseLogs;
const logs_1 = require("../logs");
/**
 * Parses a TVM Sandbox log into a list of transactions, each containing a list of log entries.
 */
function parseLogs(log) {
    const vmLines = (0, logs_1.parse)(log);
    const transactions = [];
    let entries = [];
    let currentStack = [];
    let currentGas = 1_000_000;
    const callStack = [];
    for (const vmLine of vmLines) {
        if (vmLine.$ === "VmStack") {
            currentStack = vmLine.stack;
        }
        if (vmLine.$ === "VmLoc") {
            const cellHash = vmLine.hash.toLowerCase();
            if (callStack.length === 0) {
                // first frame
                callStack.push(cellHash);
            }
            else if (callStack.length > 1 && callStack.at(-2) === cellHash) {
                // return to the previous frame
                callStack.pop();
            }
            else if (callStack.at(-1) !== cellHash) {
                // new frame
                callStack.push(cellHash);
            }
            entries.push({
                hash: cellHash,
                offset: vmLine.offset,
                stack: currentStack,
                gas: currentGas,
                implicit: false,
                gasCost: 0,
            });
            currentStack = [];
        }
        if (vmLine.$ === "VmExecute" && vmLine.instr === "implicit RET") {
            const lastEntry = entries.at(-1);
            if (lastEntry) {
                // Two subsequent RET share the same location, and this is actually wrong,
                // so we manually set the correct hash by callstack
                const actualHash = lastEntry.implicit && callStack.length > 0
                    ? (callStack.at(-1) ?? lastEntry.hash)
                    : lastEntry.hash;
                entries.push({
                    ...lastEntry,
                    hash: actualHash,
                    implicit: true,
                    gasCost: 5,
                });
            }
            callStack.pop();
        }
        if (vmLine.$ === "VmGasRemaining") {
            const newGasValue = vmLine.gas;
            const diff = currentGas - newGasValue;
            const cost = diff < 0 ? 10_000_000 - newGasValue : diff;
            const lastEntry = entries.at(-1);
            if (lastEntry) {
                lastEntry.gasCost = cost;
            }
            currentGas = newGasValue;
        }
        if (vmLine.$ === "VmLimitChanged") {
            currentGas = vmLine.limit; // reset gas
        }
        if (vmLine.$ === "VmUnknown" && vmLine.text.includes("console.log")) {
            // new transaction
            currentGas = 1_000_000;
            transactions.push([...entries]);
            entries = [];
        }
    }
    if (entries.length > 0) {
        transactions.push([...entries]);
    }
    return transactions;
}
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