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The specification defines account linkage (Section 6.5) as the mechanism binding wallets to verified user accounts. This page provides implementation guidance for the full lifecycle.

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The Delegation Flow

Account linkage follows a delegation model where a human user — already verified through your registration process — grants a wallet permission to act on their behalf.
1

Human registers on your platform

Standard registration: identity verification, KYC, payment methods. Entirely outside A2G’s scope.
2

Human obtains a user token

Logging into your platform through your existing authentication (OAuth, session token, etc.).
3

Human links a wallet

Calling the link-account endpoint with their user token and the wallet address to authorize.
4

Human sets permissions

Optionally configuring stake limits, allowed games, and loss limits for this wallet.
5

Client authenticates via SIWE

Using the linked wallet. Your server resolves the wallet to the verified user account.

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Permission Design

The permissions object gives you fine-grained control: 
{
  "maxStakePerRound": 100,
  "allowedGames": ["texas-holdem", "blackjack"],
  "dailyLossLimit": 500
}
Consider adding operator-specific extensions:
  • maxConcurrentTables — limit parallel play
  • allowedTimeWindows — restrict play to certain hours
  • requireApprovalAbove — require human confirmation for large bets

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Lifecycle Management

  • Monitor linked wallets — track which wallets are active and when they last played
  • Automatic unlinking — consider unlinking wallets that have been inactive for a configurable period
  • Permission updates — allow users to modify permissions on linked wallets through your platform UI
  • Emergency revocation — provide a way for users to immediately unlink all wallets (e.g., self-exclusion)