Contractless-GUI-Wallet/frontend/js/dashboard_network.js

function renderDashboardNetworkInfo(info) {
  if (!info || typeof info !== "object") {
    return;
  }

  latestKnownBlockHeight = Number(info.height || latestKnownBlockHeight || 0);
  setBridgeStatus(`${networkDisplayName(info)} connected`, "success");
  networkInfoHeight && (networkInfoHeight.textContent = formatNumber(info.height));
  networkInfoNetwork && (networkInfoNetwork.textContent = networkDisplayName(info));
  networkInfoDifficulty && (networkInfoDifficulty.textContent = formatNumber(info.next_block_difficulty));
  networkInfoMempool && (networkInfoMempool.textContent = formatNumber(info.total_mempool_transactions));
  networkInfoChainTx && (networkInfoChainTx.textContent = formatNumber(info.total_block_transactions));
}

function renderNodeInfo(info, checkedAt = new Date()) {
  const broadcastNode = activeBroadcastNode();
  nodeInfoNode && (nodeInfoNode.textContent = broadcastNode || "--");

  if (!info || typeof info !== "object") {
    nodeInfoHeight && (nodeInfoHeight.textContent = "--");
    nodeInfoTime && (nodeInfoTime.textContent = "--");
    nodeInfoLastChecked && (nodeInfoLastChecked.textContent = "--");
    nodeInfoLargestFee && (nodeInfoLargestFee.textContent = "--");
    return;
  }

  nodeInfoHeight && (nodeInfoHeight.textContent = formatNumber(info.height));
  nodeInfoTime && (nodeInfoTime.textContent = formatNetworkTime(info.time));
  nodeInfoLastChecked && (nodeInfoLastChecked.textContent = checkedAt.toLocaleTimeString());
  nodeInfoLargestFee && (nodeInfoLargestFee.textContent = formatLargestFee(info.largest_tx_fee));
}

function resetNetworkInfoDisplays() {
  const networkName = activeNetwork === "mainnet" ? "Mainnet" : "Testnet";
  networkInfoHeight && (networkInfoHeight.textContent = "--");
  networkInfoNetwork && (networkInfoNetwork.textContent = `${networkName} / ${activeBaseCoin()}`);
  networkInfoDifficulty && (networkInfoDifficulty.textContent = "--");
  networkInfoMempool && (networkInfoMempool.textContent = "--");
  networkInfoChainTx && (networkInfoChainTx.textContent = "--");
  setBridgeStatus(`${networkName} disconnected`, "error");
  renderNodeInfo(null);
}

async function refreshNetworkInfo({ target = "dashboard", force = false } = {}) {
  if (!walletLoaded) {
    renderNodeInfo(null);
    setBridgeStatus(`${activeNetwork === "mainnet" ? "Mainnet" : "Testnet"} disconnected`, "error");
    return null;
  }

  const invoke = window.__TAURI__?.core?.invoke;
  const broadcastNode = activeBroadcastNode();
  if (!invoke || !broadcastNode) {
    setBridgeStatus(`${activeNetwork === "mainnet" ? "Mainnet" : "Testnet"} unavailable`, "error");
    return null;
  }

  if (target === "node" && nodeInfoRefreshInFlight) {
    return null;
  }
  if (target !== "node" && networkInfoRefreshInFlight) {
    return null;
  }

  if (target === "node") {
    nodeInfoRefreshInFlight = true;
  } else {
    networkInfoRefreshInFlight = true;
  }

  try {
    const info = await invokeWalletRpcWithBackoff(
      "Network info lookup",
      () => invoke("network_info", { broadcastNode }),
      () => walletLoaded && activeBroadcastNode() === broadcastNode
    );
    const checkedAt = new Date();
    renderDashboardNetworkInfo(info);
    if (target === "node" || force) {
      renderNodeInfo(info, checkedAt);
    }
    return info;
  } catch (error) {
    setBridgeStatus(`${activeNetwork === "mainnet" ? "Mainnet" : "Testnet"} disconnected`, "error");
    if (target === "node") {
      nodeInfoLastChecked && (nodeInfoLastChecked.textContent = String(error));
    }
    return null;
  } finally {
    if (target === "node") {
      nodeInfoRefreshInFlight = false;
    } else {
      networkInfoRefreshInFlight = false;
    }
  }
}

function sleepMs(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

function walletRpcBackoffDelay(attempt) {
  return Math.min(WALLET_RPC_BACKOFF_BASE_MS * 2 ** Math.max(0, attempt - 1), WALLET_RPC_BACKOFF_MAX_MS);
}

async function invokeWalletRpcWithBackoff(label, operation, shouldContinue = () => true) {
  let lastError = null;

  for (let attempt = 1; attempt <= WALLET_RPC_RETRY_LIMIT; attempt += 1) {
    if (!shouldContinue()) {
      throw new Error(`${label} cancelled`);
    }

    try {
      return await operation();
    } catch (error) {
      lastError = error;
      if (attempt >= WALLET_RPC_RETRY_LIMIT || !shouldContinue()) {
        break;
      }
      await sleepMs(walletRpcBackoffDelay(attempt));
    }
  }

  throw lastError || new Error(`${label} failed`);
}

function bytesToHex(bytes) {
  return Array.from(bytes || [])
    .map((byte) => Number(byte).toString(16).padStart(2, "0"))
    .join("");
}

function bytesToText(bytes) {
  return String.fromCharCode(...Array.from(bytes || [])).trim();
}

function readU32LE(bytes, offset) {
  return (
    Number(bytes[offset] || 0) |
    (Number(bytes[offset + 1] || 0) << 8) |
    (Number(bytes[offset + 2] || 0) << 16) |
    (Number(bytes[offset + 3] || 0) << 24)
  ) >>> 0;
}

function readU64LE(bytes, offset) {
  let value = 0n;
  for (let index = 7; index >= 0; index -= 1) {
    value = (value << 8n) + BigInt(Number(bytes[offset + index] || 0));
  }
  return value;
}

function formatAtomicValue(value) {
  const atomic = typeof value === "bigint" ? value : BigInt(value || 0);
  const whole = atomic / 100000000n;
  const fraction = atomic % 100000000n;
  const fractionText = fraction.toString().padStart(8, "0").replace(/0+$/, "");
  return fractionText ? `${whole}.${fractionText}` : whole.toString();
}

function bytesToAddressHex(bytes) {
  return bytesToHex(bytes).toLowerCase();
}

function addressLabel(addressHex) {
  return addressHex ? `${addressHex.slice(0, 8)}...${addressHex.slice(-8)}` : "Unknown";
}

function isActiveAddress(addressHex) {
  return Boolean(addressHex && activeWalletAddressHex && addressHex.toLowerCase() === activeWalletAddressHex.toLowerCase());
}

function isActiveShortAddress(address) {
  return Boolean(address && activeWalletAddressShort && String(address).trim().toLowerCase() === activeWalletAddressShort.toLowerCase());
}

function isActiveWalletAddress(address) {
  const clean = String(address || "").trim().toLowerCase();
  if (!clean) {
    return false;
  }
  return clean.includes(".") ? isActiveShortAddress(clean) : isActiveAddress(clean);
}

function assetWithSeries(asset, series) {
  const cleanAsset = (asset || "").trim() || activeBaseCoin();
  return Number(series || 0) > 0 ? `${cleanAsset} #${series}` : cleanAsset;
}

function signedAmount(sign, value) {
  const formatted = formatAtomicValue(value);
  if (!formatted || formatted === "0") {
    return formatted;
  }
  return `${sign}${formatted}`;
}

function signedBaseFee(sign, value) {
  const amount = signedAmount(sign, value);
  return amount && amount !== "0" ? `${amount} ${activeBaseCoin()}` : "--";
}

function statusForBlock(blockHeight, currentHeight = latestKnownBlockHeight) {
  if (!currentHeight || !blockHeight || currentHeight < blockHeight) {
    return "Pending";
  }
  return currentHeight - blockHeight >= CONFIRMED_AFTER_BLOCKS ? "Confirmed" : "Pending";
}

function walletStatusForBlock(blockHeight, currentHeight = latestKnownBlockHeight) {
  const height = Number(blockHeight || 0);
  if (!height) {
    return "Unconfirmed";
  }
  return statusForBlock(height, currentHeight);
}

function blockValueFromRecord(record) {
  const block = record?.block ?? record?.block_height ?? record?.blockHeight ?? null;
  const numeric = Number(block || 0);
  return numeric > 0 ? numeric : null;
}

function dashboardRow(base, type, asset, counterparty, amount, fee = "--") {
  return {
    ...base,
    type,
    asset,
    counterparty,
    amount,
    fee
  };
}

function txTypeName(type) {
  return {
    0: "Genesis",
    1: "Reward",
    2: "Transfer",
    3: "Create Token",
    4: "Create NFT",
    5: "Marketing",
    6: "Swap",
    7: "Create Loan",
    8: "Loan Payment",
    9: "Collateral Claim",
    10: "Burn",
    11: "Issue Token",
    12: "Vanity Address"
  }[type] || "Transaction";
}

function parseLoanContractSummary(transaction) {
  if (transaction && typeof transaction === "object" && !Array.isArray(transaction)) {
    const unsigned = transaction.unsigned_loan_contract;
    if (!unsigned) {
      return null;
    }
    return {
      loanCoin: unsigned.loan_coin || "Loan",
      loanAmount: unsigned.loan_amount || 0,
      lender: unsigned.lender || "",
      collateral: unsigned.collateral || "Collateral",
      collateralAmount: unsigned.collateral_amount || 0,
      borrower: unsigned.borrower || ""
    };
  }

  const bytes = Array.from(transaction || []);
  if (Number(bytes[0] || 0) !== 7) {
    return null;
  }
  return {
    loanCoin: bytesToText(bytes.slice(5, 20)) || "Loan",
    loanAmount: readU64LE(bytes, 20),
    lender: bytesToAddressHex(bytes.slice(28, 50)),
    collateral: bytesToText(bytes.slice(50, 71)) || "Collateral",
    collateralAmount: readU64LE(bytes, 71),
    borrower: bytesToAddressHex(bytes.slice(79, 101))
  };
}