Escrow Program

The Agentic Wallet includes a production-ready Anchor program that implements a full-featured escrow system on Solana. This enables trustless payments, milestone-based releases, and dispute resolution.

Overview

The escrow program is a real Anchor smart contract (not a memo placeholder) that supports:

Standard Escrow: Two-party escrow with arbiter support
Milestone Escrow: Multi-phase payment releases
x402 Protocol: HTTP 402 payment-required integration
Dispute Resolution: Third-party arbiter workflow
Auto-release: Time-based automatic releases

The program source code is in programs/escrow/src/lib.rs and uses PDAs (Program Derived Addresses) for secure state management.

Building and Deploying

Prerequisites

Anchor CLI >= 0.31
Solana CLI >= 1.18
Funded devnet wallet (set via PRIVATE_KEY in .env)

Build the Program

Build escrow contract

npm run escrow:build

This compiles the Anchor program and generates the IDL.

Deploy to devnet

npm run escrow:deploy:devnet

This command:

Syncs declare_id! in the Rust code with your deploy keypair
Builds and deploys via Anchor
Updates .env with ESCROW_PROGRAM_ID=<deployed_id>

Verify deployment

curl -H 'x-api-key: dev-api-key' http://localhost:3000/api/v1/protocols/escrow/health

Expected response:

{
  "ok": true,
  "configured": true,
  "deployed": true,
  "programId": "7U9zNRhvzTSnA7jQmUbVf9bT4Vg41qF6yJaXU5J6tCGC"
}

Escrow Operations

All escrow operations are accessible via intents through the escrow protocol adapter.

Create Escrow

Initialize a new escrow account with funds locked from the creator.

npm run intent-runner -- --intent '{
  "type": "create_escrow",
  "walletId": "<creator-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900001",
    "counterparty": "<recipient-pubkey>",
    "creator": "<creator-pubkey>",
    "arbiter": "<arbiter-pubkey>",
    "feeRecipient": "<fee-recipient-pubkey>",
    "amount": "10000000",
    "deadlineUnixSec": 4102444800,
    "terms": "Devnet escrow test"
  }
}'

Intent Parameters

escrowNumericId: Unique numeric identifier for this escrow (used in PDA derivation)
counterparty: Recipient public key
creator: Creator public key (must match wallet)
arbiter: Third-party arbiter for disputes
feeRecipient: Address to receive protocol fees
amount: Lamports to lock in escrow
deadlineUnixSec: Unix timestamp deadline
terms: Human-readable terms (hashed on-chain)

Accept Escrow

The recipient accepts the escrow, moving it from Created to Active status.

npm run intent-runner -- --intent '{
  "type": "accept_escrow",
  "walletId": "<recipient-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900001",
    "creator": "<creator-pubkey>"
  }
}'

Acceptance must occur before the deadline, or the escrow cannot transition to Active.

Release Escrow

The creator releases funds to the recipient after work is completed.

npm run intent-runner -- --intent '{
  "type": "release_escrow",
  "walletId": "<creator-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900001",
    "creator": "<creator-pubkey>",
    "counterparty": "<recipient-pubkey>",
    "feeRecipient": "<fee-recipient-pubkey>"
  }
}'

Fees are automatically deducted based on fee_basis_points (e.g., 100 = 1%).

Refund Escrow

The creator can request a refund under specific conditions:

Before acceptance: Cancels the escrow (status → Cancelled)
After deadline expiry: Refunds the creator (status → Refunded)

npm run intent-runner -- --intent '{
  "type": "refund_escrow",
  "walletId": "<creator-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900001",
    "creator": "<creator-pubkey>"
  }
}'

Dispute Escrow

Either party can open a dispute during the Active phase.

npm run intent-runner -- --intent '{
  "type": "dispute_escrow",
  "walletId": "<disputer-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900001",
    "creator": "<creator-pubkey>",
    "reason": "Work not completed as agreed"
  }
}'

Resolve Dispute

The arbiter decides the winner and distributes funds accordingly.

npm run intent-runner -- --intent '{
  "type": "resolve_dispute",
  "walletId": "<arbiter-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900001",
    "creator": "<creator-pubkey>",
    "counterparty": "<recipient-pubkey>",
    "feeRecipient": "<fee-recipient-pubkey>",
    "winner": "recipient"
  }
}'

Winner Options

creator: Full refund to creator
recipient: Payout to recipient (minus fees)

Milestone Escrow

For multi-phase projects, use milestone escrows to release funds incrementally.

Create Milestone Escrow

npm run intent-runner -- --intent '{
  "type": "create_milestone_escrow",
  "walletId": "<creator-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900002",
    "counterparty": "<recipient-pubkey>",
    "creator": "<creator-pubkey>",
    "arbiter": "<arbiter-pubkey>",
    "feeRecipient": "<fee-recipient-pubkey>",
    "amount": "50000000",
    "deadlineUnixSec": 4102444800,
    "terms": "5-milestone project"
  }
}'

Release Individual Milestone

npm run intent-runner -- --intent '{
  "type": "release_milestone",
  "walletId": "<creator-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900002",
    "creator": "<creator-pubkey>",
    "counterparty": "<recipient-pubkey>",
    "feeRecipient": "<fee-recipient-pubkey>",
    "milestoneIndex": 0
  }
}'

x402 Protocol Integration

The x402_pay instruction enables HTTP 402 (Payment Required) workflows.

npm run intent-runner -- --intent '{
  "type": "x402_pay",
  "walletId": "<payer-wallet-id>",
  "protocol": "escrow",
  "intent": {
    "escrowNumericId": "900003",
    "counterparty": "<service-provider-pubkey>",
    "creator": "<payer-pubkey>",
    "arbiter": "<arbiter-pubkey>",
    "feeRecipient": "<fee-recipient-pubkey>",
    "amount": "1000000",
    "deadlineUnixSec": 1735689600,
    "terms": "API access payment"
  }
}'

The is_x402 flag in the on-chain state enables special handling for HTTP payment flows.

Querying Escrow State

List Wallet Escrows

curl -H 'x-api-key: dev-api-key' \
  http://localhost:3000/api/v1/wallets/<wallet-id>/escrows

Check Transaction Proof

curl -H 'x-api-key: dev-api-key' \
  http://localhost:3000/api/v1/transactions/<tx-id>/proof

Returns:

intentHash: Hash of the original intent
policyHash: Policy evaluation fingerprint
simulationHash: Pre-flight simulation result
proofHash: Combined cryptographic proof
Transaction signature and explorer link

On-Chain Program Details

Account Structure

pub struct EscrowAccount {
    pub creator: Pubkey,
    pub recipient: Pubkey,
    pub arbiter: Pubkey,
    pub fee_recipient: Pubkey,
    pub amount: u64,
    pub status: EscrowStatus,
    pub deadline: i64,
    pub terms_hash: [u8; 32],
    pub fee_basis_points: u16,
    pub created_at: i64,
    pub escrow_id: u64,
    pub bump: u8,
    pub dispute_reason: [u8; 64],
    pub auto_release_at: i64,
    pub is_milestone: bool,
    pub is_x402: bool,
}

Status Lifecycle

Created

Initial state after create_escrow. Funds locked, awaiting recipient acceptance.

Active

Recipient has accepted. Creator can release, or either party can dispute.

Disputed

Dispute opened. Only arbiter can resolve.

Completed

Funds released to recipient. Escrow closed.

Refunded

Funds returned to creator after deadline. Escrow closed.

Cancelled

Creator cancelled before acceptance. Escrow closed.

Resolved

Arbiter resolved dispute. Escrow closed.

PDA Derivation

Escrow accounts use Program Derived Addresses:

seeds = [b"escrow", creator.key().as_ref(), &escrow_id.to_le_bytes()]

This ensures deterministic addresses and prevents collisions.

CLI Integration

For interactive escrow workflows:

npm run cli -- interactive

Select Protocol Interaction → Escrow and follow the prompts for:

Creating escrows
Accepting tasks
Releasing payments
Handling disputes

Security Considerations

Production Checklist:

Deploy program with a dedicated upgrade authority
Use hardware wallets for arbiter keys
Set reasonable fee caps (max 1000 basis points = 10%)
Validate all public keys before submission
Monitor program logs for anomalies

Fee Safety

The program enforces:

require!(fee_basis_points <= 1000, EscrowError::FeeTooHigh);

This caps fees at 10%.

Deadline Validation

require!(deadline > clock.unix_timestamp, EscrowError::DeadlineExpired);

Prevents creating escrows with past deadlines.

Next Steps

Multi-Agent Orchestration

Coordinate escrow operations across multiple agents

Gasless Transactions

Enable gasless escrow operations via Kora RPC

Usage Guides

Advanced

Overview

Building and Deploying

Prerequisites

Build the Program

Escrow Operations

Create Escrow

Accept Escrow

Release Escrow

Refund Escrow

Dispute Escrow

Resolve Dispute

Milestone Escrow

Create Milestone Escrow

Release Individual Milestone

x402 Protocol Integration

Querying Escrow State

List Wallet Escrows

Check Transaction Proof

On-Chain Program Details

Account Structure

Status Lifecycle

PDA Derivation

CLI Integration

Security Considerations

Fee Safety

Deadline Validation

Next Steps

Multi-Agent Orchestration

Gasless Transactions

​Overview

​Building and Deploying

​Prerequisites

​Build the Program

​Escrow Operations

​Create Escrow

​Accept Escrow

​Release Escrow

​Refund Escrow

​Dispute Escrow

​Resolve Dispute

​Milestone Escrow

​Create Milestone Escrow

​Release Individual Milestone

​x402 Protocol Integration

​Querying Escrow State

​List Wallet Escrows

​Check Transaction Proof

​On-Chain Program Details

​Account Structure

​Status Lifecycle

​PDA Derivation

​CLI Integration

​Security Considerations

​Fee Safety

​Deadline Validation

​Next Steps

Multi-Agent Orchestration

Gasless Transactions

Overview

Building and Deploying

Prerequisites

Build the Program

Escrow Operations

Create Escrow

Accept Escrow

Release Escrow

Refund Escrow

Dispute Escrow

Resolve Dispute

Milestone Escrow

Create Milestone Escrow

Release Individual Milestone

x402 Protocol Integration

Querying Escrow State

List Wallet Escrows

Check Transaction Proof

On-Chain Program Details

Account Structure

Status Lifecycle

PDA Derivation

CLI Integration

Security Considerations

Fee Safety

Deadline Validation

Next Steps