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This chapter of the Didit Academy fraud rule engine lesson picks up at wallet risk and what the score bands mean. The rule-engine Academy lesson reaches wallet risk at 3:00: what the score bands mean and how a wallet’s exposure feeds the transaction risk score. Wallet Screening checks blockchain risk for $0.15 per wallet or transaction-hash screening. Screen wallets before a transfer, screen transaction hashes after the fact, and send the results to the Transaction Monitoring rules engine. Wallet Screening is part of Didit’s Monitoring lifecycle stage — checks that run continuously, post-onboarding, on every flow of funds in or out of your platform.

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How it works

  1. Connect a provider. In Transactions → Settings → Provider Preferences in the Business Console, choose managed pricing or connect an existing provider API key. The default provider is Crystal.
  2. Submit a transaction with crypto details. Set transaction_details.currency_kind: "crypto" and provide a wallet address in the participant matching the transfer direction. Didit screens the wallet (pre-transfer) or the transaction hash (post-transfer) automatically.
  3. Receive a standardised result. Risk score 0-100, severity (LOW, MEDIUM, HIGH, CRITICAL), a source-of-funds breakdown, an exposure table, and a network graph. The result feeds the rules engine and triggers any matching webhooks.

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Risk signals

Every screening produces a standardised payload regardless of which provider sits behind it:
  • Risk score (0-100) — higher means greater exposure to risky entities.
  • Severity — LOW, MEDIUM, HIGH, CRITICAL derived from the score.
  • Source of funds — percentage breakdown across 14+ categories (sanctioned, terrorist financing, child exploitation, ransomware, stolen funds, darknet markets, mixers, scams, high-risk exchanges, gambling, regulated exchanges, P2P, unidentified services).
  • Exposure table — counterparty entities with direct vs. indirect hop distance, received and sent amounts, per-entity risk level.
  • Network graph — node-edge view of the wallet’s transaction relationships with centrality and depth metrics. Visualised in the Business Console.
  • Sanctions, darknet, and mixer flags — surfaced as discrete signals so rules can decline instantly.

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Providers

Connecting your provider key lets you use an existing commercial agreement with a blockchain analytics provider. Didit charges a $0.02 infrastructure fee for each screening routed through a Didit workflow.

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Pricing

**Wallet Screening starts at 0.15percheckwithmanagedpricing.∗∗Ifyouconnectanexistingproviderkey,Diditchargesa0.15 per check with managed pricing.** If you connect an existing provider key, Didit charges a 0.02 infrastructure fee per screening. No minimums or contracts apply. See the pricing page for volume pricing.

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Integration

The full API surface — request payloads, direction rules, pre-transfer vs. post-transfer screening, and the rule-engine integration — lives on the Transaction Monitoring AML Screening page. Wallet Screening is enabled by setting currency_kind: "crypto" on the transaction and toggling the application-level default in the Console.

API: crypto screening

Pre-transfer vs. post-transfer payloads, required fields, response shape.

Rules & scoring

How wallet-screening results feed the real-time rule engine.

Cases & SAR workflow

Triage high-risk wallet hits, draft SARs, keep an audit trail.

Travel Rule

FATF Travel Rule support for VASPs and crypto exchanges.