Wallet Sandbox; Keypair Generator, Testnet Funder & Test Payment Console

[grantfox-oss]

Overview

Every Stellar developer's first step is generating a keypair and funding it on testnet. Right now this means jumping between the Stellar Laboratory, Friendbot, and Horizon Explorer as three separate tools. SaviTools should close that loop with a single Sandbox page that handles the full wallet bootstrap workflow — generate, fund, inspect, and send test payments — without leaving the tool.

What needs to be built

NestJS API — apps/api/src/modules/sandbox/

• POST /sandbox/keypair — generates a new ed25519 keypair; returns public key + secret key (never stored server-side; generation must be stateless)

• POST /sandbox/fund — calls Friendbot with the provided public key; returns funding tx hash and confirmation status

• GET /sandbox/account/:publicKey — proxies Horizon account details: balances, sequence number, signers, thresholds, flags

• POST /sandbox/payment — submits a test payment (XLM or any issued asset) between two sandbox accounts; returns tx hash and result codes
  Next.js web — /sandbox route

• "Generate Keypair" button — renders public key + secret key side by side with individual copy buttons

• Persistent warning banner: "This sandbox is for Stellar testnet only. Never use generated keys for real funds."

• "Fund on Testnet" — one-click Friendbot call anchored to the generated public key; shows tx hash with Stellar Expert link on success

• Account Inspector panel — enter any public key, renders live balance table (asset, balance, limit), sequence number, and signer list

• Send Test Payment form:

  • From / To public key fields
  • Asset selector (XLM or custom code:issuer)
  • Amount input
  • Memo field (optional)
  • Submit → shows tx hash, fee charged, and result code inline

• Testnet / Mainnet toggle inherited from global app state (sandbox features disabled on mainnet with a clear callout)

Acceptance Criteria

• Keypair generation uses client-side entropy — no secret key is ever transmitted to the API
• Friendbot funding completes and the Account Inspector reflects the new balance within 5 seconds
• Payment form validates asset format (CODE:ISSUER) before submission and shows inline validation errors
• All testnet-only warnings are visible above the fold without scrolling
• Page is fully functional at 375px viewport width (mobile)

[Menjay7]

Hi! I came across this issue and would love to work on it. I have experience with similar tasks and I'm confident I can investigate, implement a clean solution, and thoroughly test it before submitting a PR. If the issue is still open, I would appreciate it if you could assign it to me. Thank you!

[OZILSOLAR]

Hi team!!!!
I would like to work on this issue!!!!!

[OZILSOLAR]

Hi team!!!!
I would like to work on this issue!!!!!

[Adeolu01]

Hello Maintainer , I would love to resolve this issue as I am familiar with it. Please assign

[Fred0104]

I can take this if it is still open. I recently worked through Stellar wallet setup, Horizon account data, trustlines, and Friendbot-style funding flows.

I would keep keypair generation client-side, add focused API helpers for funding/account lookup, then build the /sandbox page with clear testnet warnings, copy buttons, balance inspection, and mobile-safe validation. I can verify generate -> fund -> inspect on testnet before opening the PR.

[Yasir-TechGuy]

Hi Maintainer, I would like to work on this issue because it improves the developer onboarding experience by bringing key Stellar testnet workflows into a single, user-friendly interface. I have experience contributing to Stellar ecosystem projects involving APIs, testing, and blockchain integrations, and I'm confident in delivering a secure, well-tested sandbox that balances usability with proper handling of sensitive key material.

[0xNinx]

Hi, please can you assign me this issue? I can finish in 5hours. Thanks

[grantfox-oss]

🦊 GrantFox — @0xNinx has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #19)
2. Your PR will be reviewed by the Savitura maintainers

Good luck! Track your progress on GrantFox.