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Fystack v0.1.13: Gas Sponsorship for EVM, Solana & TRON + Auto Gas Refill

Thi Nguyen

Thi Nguyen

Author

April 28, 2026
5 min read

Founder

Fystack v0.1.13: Gas Sponsorship for EVM, Solana & TRON + Auto Gas Refill

Holding native tokens just to pay gas is one of the most painful onboarding steps in crypto. Your users want to send a stablecoin - they don't want to first acquire ETH, SOL, or TRX, top up the right wallet, and then try the transaction.

With Fystack v0.1.13, that friction is gone. Workspaces can now sponsor gas for every wallet they manage. Users move tokens; the workspace pays the fees.

This release also ships a redesigned withdrawal tracker, finer-grained wallet permissions, network-scoped wallet creation, and a new wallet lifecycle UI.

Included in this release: Apex Platform v0.1.13 · Fystack UI v0.1.13

TL;DR

  • Gas Sponsorship - sponsor gas across EVM, Solana, and TRON out of a single workspace gas tank. End users no longer need native coins to transact.
  • Auto Gas Refill UI - full operator experience in the dashboard with per-network configuration, validation, and clear messaging in send/withdraw flows.
  • Redesigned Withdrawal Tracker - handle multiple concurrent withdrawals on one screen, with a new Funding Gas step.
  • Per-Field Wallet Permissions - admins can manage day-to-day settings; sensitive controls remain owner-only.
  • Network-Scoped Wallets - create and filter wallets per network, no more leakage from chains you don't use.
  • Wallet Lifecycle Controls - delete, disable, or remove individual assets directly from the wallet table.

Auto-Fuel: Gas Sponsorship for EVM, Solana & TRON

The headline feature in v0.1.13 is Gas Sponsorship

Here's how it works:

  1. Turn on Gas Sponsorship for a wallet — at creation, or later from the wallet settings page.
  2. When that wallet sends a token, Apex automatically funds the gas needed to broadcast the transaction.
  3. The gas comes from a workspace-managed gas station, not the user's wallet.

Coverage spans the three biggest token ecosystems:

Chain Sponsored assets
EVM ERC-20 tokens
Solana SPL tokens
TRON TRC-20 tokens

A new FUNDING_GAS withdrawal status and withdrawal.funding_gas webhook make the sponsorship step visible end-to-end — in your integrations, in transaction history, and in the in-app tracker. Withdrawal previews also show the expected top-up amount up front, so there are no surprises.

Why this matters

  • Onboard end users without forcing them to acquire native coins. No more "go buy 0.005 ETH first, then come back."
  • Centralize funding in one workspace gas tank instead of topping up wallets individually.
  • Build consumer-grade flows where the app sponsors fees transparently — your users never even see them.

Auto Gas Refill

Auto gas refill feature

Auto Gas Refill monitors native token balances (ETH, TRX, SOL) in each wallet.
When the balance drops below a set threshold, it automatically sends gas from a gas station wallet to top it up.


Use Case

  • Prevents failed transactions due to insufficient gas
  • Removes manual top-ups for ops teams
  • Ensures smooth execution for token transfers, trading, and custody flows across chains

Operators get full visibility via dashboard, wallet settings, and transaction history, without needing to check logs.


Withdrawal Tracker, Rebuilt

The old withdrawal tracker was designed around a single in-flight transaction. With sponsored gas adding new lifecycle states - and operators routinely running batched withdrawals - we rebuilt it.

  • Multiple concurrent in-flight withdrawals on a single screen.
  • Each withdrawal shows its own progress states, including the new Funding Gas step.
  • Refreshed layout and copy across the entire withdraw flow.

It's now genuinely useful for ops teams who push dozens of withdrawals at a time.


Per-Field Wallet Settings Permissions

Wallet settings used to be all-or-nothing — every change required the wallet owner. That meant routine work like renaming a wallet or toggling gas sponsorship had to wait for an owner to log in.

In v0.1.13, settings are governed by per-field permissions:

  • Admins can update non-sensitive fields:
    • Wallet name
    • Gas sponsorship toggle
  • Owners are still required for sensitive controls:
    • Signing threshold
    • Disabled state
    • Auto-approval limit

When a permission is missing, a clear error message lists exactly which fields are blocked — no more guessing.

This closes a long-standing gap in our access model.


Network-Scoped Wallets

If your workspace runs on a curated set of chains, you don't want unrelated networks cluttering the UI. Wallet creation and listing are now network-aware:

  • A new network selector in the create-wallet form.
  • Wallet lists and filters honor the selected networks.
  • Cleaner network metadata across forms and modals.

Smaller surface, fewer mistakes.


Wallet Lifecycle: Delete, Disable, Remove Asset

Wallet owners now have a full lifecycle UI for cleaning up wallets — with the right guardrails.

  • Delete a wallet directly from the wallet table (owner-only).
  • Disable a wallet to pause activity without deleting it.
  • Remove an individual asset from a wallet.
  • New wallet purpose dropdown in the create-wallet form.

Polish Pass: Notifications & Modals

A handful of high-traffic surfaces got cleaned up:

  • Refreshed notification icons and grouping for deposits, withdrawals, and other events.
  • Deposit and withdraw modals show the correct network logo dynamically.
  • Asset views fall back to the asset name when no avatar is available.
  • Tighter styling for pending-withdrawal alerts and transaction items.

Small things, but they add up.


Wrapping Up

Fystack v0.1.13 is the gas sponsorship release. Auto-Gas Refill removes one of the biggest onboarding blockers in crypto — and the supporting UI, permissions, and lifecycle work make it production-ready from day one.

If you're already using Fystack self-hosted, the upgrade is seamless. If you're evaluating, this is a good moment to take another look. Fystack builds custody infrastructure that helps businesses automate their digital asset workflows, payments, treasury, payouts, and settlements - efficiently and at a fraction of the cost of traditional custodians.

We support multiple key management approaches including MPC threshold signing (keys never exist in one place), standard HD wallets so teams can choose the security model that fits their needs.


Not ready yet?
Join our Telegram to follow architecture updates and product discussions: https://t.me/+9AtC0z8sS79iZjFl

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