Skip to main content
Instead of working with low-level logs and method calls, you get decoded actions, labels, and categories that describe wallet activity in a clear, consistent way.

​
What This Includes

Transaction decoding and enrichment combines two core capabilities:
  • Wallet activity categorisation (what type of action occurred)
  • ABI-based decoding and labelling (what the transaction did at a contract level)
Together, these form Moralis’ semantic transaction layer.

​
Wallet Activity Decoding

Moralis can return a single, chronological view of a wallet’s onchain activity, covering all major transaction types. This includes:
  • Native transfers
  • ERC20 swaps and token transfers
  • NFT transfers and sales
  • DeFi interactions
  • Smart contract interactions
All activity is normalized into a consistent timeline, removing the need to aggregate multiple endpoints or data sources.

​
Key Benefits

  • Single API request
    Fetch a complete wallet history in one call.
  • Automatic categorisation
    Each transaction is classified into a clear, human-readable category.
  • Reduced complexity
    No need to manually decode logs, traces, or contract calls.
  • Consistent ordering
    Transactions are returned in a clean, chronological format.

​
Transaction Categories

Each transaction is assigned a category based on its onchain behavior. Currently supported categories include:
  • Send
  • Receive
  • Token Send
  • Token Receive
  • NFT Send
  • NFT Receive
  • Deposit
  • Withdraw
  • Token Swap
  • Airdrop
  • Mint
  • Burn
  • NFT Purchase
  • NFT Sale
  • Borrow
  • Approve
  • Revoke
  • Contract Interaction
Category support is continuously expanding as new transaction patterns and protocols are added.

​
ABI Decoding & Transaction Labelling

Beyond high-level categories, Moralis also decodes transactions at the contract interaction level. Using verified ABIs and internal decoding logic, Moralis:
  • Decodes method calls
  • Interprets parameters
  • Assigns meaningful labels to transactions
This allows you to distinguish between different contract interactions even when they fall under the same high-level category.

​
Why This Matters

Transaction decoding and enrichment enables you to:
  • Build readable wallet activity feeds
  • Show users what they actually did onchain
  • Power analytics, notifications, and alerts
  • Avoid custom ABI decoding and protocol-specific logic
  • Deliver consistent UX across chains and protocols
This is especially valuable for:
  • Wallets and portfolio trackers
  • Analytics dashboards
  • Tax and accounting tools
  • Compliance and monitoring systems

​
Important Notes

  • Decoding and categorisation are best-effort and based on available onchain data and ABIs
  • Unknown or unverified contracts may fall back to generic labels (e.g. Contract Interaction)
  • New transactions occurring during pagination will not affect already-decoded results (see Pagination)