Base SepoliaSC—001
Bilateral acceptance preview
25,000 USDC
Template v0.1
A
→0x71…9E2F
DepositorB
0xA8…45C1
RecipientTerms lockedWallet signingExecution planned
Prototype only. No funds move and no contract is deployed.
AI-assisted signing beta · no real funds
Describe the deal.
Sign with your wallet.
Reviewed code will execute it.
Describe a bilateral USDC agreement, review the AI proposal, then lock visible terms and verify two EIP-712 wallet acceptances. This beta does not deploy, fund or execute a smart contract.
No keys or discretionary custodyAI proposals require your approvalVisible terms are hashed
01Your keys stay in your wallet
02Readable terms match signed data
03One canonical terms hash
04Each EIP-712 acceptance verified
From intent to execution
Complex underneath. Calm on the surface.
AI proposal, human review, signing, funding and execution are separate stages. Only proposal and acceptance signatures are active in this beta.
Describe
Choose a versioned template and set the business terms in plain language.
Review
See the readable agreement, exact parameters, fees, deadlines and failure paths.
Connect & sign · live
Each party test-signs the same locked revision from its own wallet on Base Sepolia.
Fund & execute · planned
A later reviewed template may fund, release or refund onchain. This prototype stops after verified signatures.
Interactive prototype · public beta
Describe, review, then collect two test signatures.
First let the constrained assistant propose fields for this fixed template. Then connect two distinct desktop wallets and sign the same EIP-712 acceptance on Base Sepolia. No transaction or token approval is requested.
✓ Review before applying✓ No gas✓ No funds✓ No seed phrase
01 · LivePropose & review
AI suggests fields; only you can apply them.
02 · LiveLock & sign
Two locally verified EIP-712 acceptances.
03 · PlannedShare
Persistent private link for separate devices.
04 · PlannedFund & execute
Reviewed onchain release or refund rules.
Transaction patterns
One live signature test. Six paths to evaluate.
A wallet proves control of a key—not identity, legal authority or title. Every future template needs reviewed code, explicit exits and, where required, qualified legal or data partners.
Prototype01
Two-wallet acceptance
Two distinct wallets sign one locked EIP-712 terms hash. This is the only live flow: no funding, deployment or execution.
ReferencesEIP-712 ↗
Planned02
P2P escrow
A reviewed template could separate acceptance, funding, release, cancellation and timeout refund without platform discretion.
ReferencesKleros Escrow ↗
Planned03
Milestones & vesting
Defined tranches or time-based releases, each with visible approvals, deadlines and failure paths before funds move.
Partner required04
Inheritance release
A wallet can approve a release only after identity, authority and the external legal event are verified. Key control alone is not legal authority.
Planned05
Onchain token exchange
Atomic exchange of supported onchain assets is a separate reviewed template—not a public order book, fiat exchange or custody service.
ReferencesUniswap ↗
Partner required06
Real-estate closing
Smart contracts may coordinate payment and attestations; a recognized registry, notary or authority must complete legal title transfer.
ReferencesHM Land Registry ↗
References illustrate established technical patterns or real-world boundaries; they do not certify a Signature Chain implementation or replace local advice.
Security by constraint
AI may configure.
Reviewed code must execute.
The assistant can propose three editable fields for one fixed template; nothing is applied without your click. Onchain execution is not active. Generated text never becomes executable code, and production templates require independent review plus legal, incident and version controls.
01Constrained AI · live
Proposes editable fields only; never code, signatures or transactions.
02Human review · live
Proposal and draft remain separate until you explicitly apply.
03Wallet signing · live
No seed phrase, private-key transfer or funding request.
04Explicit exits · required
No production template without timeout, refund, cancellation and dispute rules.
Proposed launch model · not charged today
Pay to configure.
Pay for successful release.
The Base Sepolia signature prototype is free. For a later production launch, the proposed model is per agreement with no subscription; every payable amount must be shown before a wallet signs or funds.
Software configuration for one supported template, two wallets and up to three revisions. Exact network allowance must be published before launch.
Five proposed software credits valid for 12 months. No credits or payments are sold in this prototype.
Proposed: 0.10% of the amount successfully released, paid on top of principal. No execution commission on cancellation or refund. The future treasury receives the fee only; it cannot release or refund principal.
Proposed fee preview · not a chargeUSD / USDC
- Proposed software configuration
- $29.00
- Proposed successful release · 0.10%
- $10.00
- Estimated Signature Chain fees
- $39.00
$0 is charged today. Future gas, tax, legal, oracle, bridge or third-party costs are excluded unless explicitly included before signature. Fee mechanics and the treasury address must be encoded and disclosed before production.
The important questions
Clear rules before any signature.
Does Signature Chain hold my funds or private keys?+
No private keys or funds enter this prototype. In a future reviewed template, assets may be locked by disclosed smart-contract rules; Signature Chain would not operate a discretionary wallet or release or refund principal unilaterally.
Does the AI write a new smart contract for every deal?+
No. The live assistant proposes only the title, USDC amount and deadline for this fixed bilateral template. You must review and apply the proposal yourself. Any production execution must use versioned, independently reviewed code—not free-form AI code.
What happens if the parties disagree?+
Every template needs explicit timeout, cancellation, refund and deadlock rules. A configurable dispute adapter is planned after the bilateral escrow flow is tested.
Is the agreement legal advice?+
No. Signature Chain provides software, not legal, tax, investment, fiduciary, brokerage, title or escrow advice. A wallet signature proves key control, not identity, professional authority or legal ownership. Consult qualified local counsel when required.
Are the proposed fees charged in this prototype?+
No. The Base Sepolia prototype is free and requests no payment, token approval or funding transaction. The $29 creation fee and 0.10% successful-release fee are a proposed launch model only.
Signature Chain