Reconciling Token Transfers with Balance Snapshots
Compare opening balances, token movements and closing state with aligned blocks, exact units and explicit treatment of unexplained differences.
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Blockchain data.
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Practical guides to blockchain APIs, wallet data and the evidence behind a useful answer. Clear concepts, worked examples and better questions for your next integration.
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Rebasing Tokens: Why Transfers May Not Explain Balances
Understand rebasing-token balance changes, why transfer-only reconstruction can fail, and how to preserve state observations and protocol context.
Read the guideFee-on-Transfer Tokens: Requested vs Received Amounts
Handle tokens that deduct transfer fees by separating requested amounts, actual recipient changes and the contract-specific evidence behind each value.
Read the guideZero-Value Token Transfers: Keep or Filter?
Decide how to handle zero-value token transfer events without confusing display filters, event identity, wallet ownership or economic activity.
Read the guideDate Ranges in Wallet Activity Reports
Choose inclusive and exclusive date boundaries for wallet history, convert them to chain ranges, and avoid duplicates between adjacent reporting periods.
Read the guideFinding a Wallet’s First Transaction Reliably
Define what first wallet activity means, distinguish discovery from coverage, and avoid treating a partial API response as a wallet creation date.
Read the guideNormalising Wallet Addresses Without Losing Identity
Normalise wallet addresses for comparison while preserving display checksums, network context and the different encoding rules of non-EVM chains.
Read the guideFiltering Spam Tokens in Wallet Interfaces
Design reversible spam-token filters using explicit signals, without treating a token symbol, unsolicited transfer or logo as proof of trust.
Read the guideNetwork Fees in Wallet Transaction Reports
Track network execution fees separately from transferred value, preserve failed-transaction costs, and avoid charging every transfer event the full fee.
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Designing a Reliable Wallet Transaction CSV Export
Export wallet activity with stable IDs, exact quantities, time-zone clarity and safe spreadsheet handling, while preserving links to original records.
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ERC-20 vs ERC-721 vs ERC-1155 Data Models
Compare fungible, unique and multi-token asset records, including balance keys, token IDs and the events a data integration must preserve.
Read the guideDecoding ERC-1155 Batch Transfers Without Double Counting
Expand ERC-1155 batch events into ID-and-value movements, preserve array pairing and event identity, and test malformed or repeated deliveries.
Read the guideRefreshing NFT Metadata Without Rewriting History
Cache and refresh NFT metadata while preserving observation times, content references and the distinction between mutable descriptions and token ownership.
Read the guideNFT Floor Price: What the Lowest Listing Misses
Interpret NFT floor prices with marketplace scope, listing validity and asset comparability, without treating one listing as a guaranteed sale value.
Read the guideNFT Trading Volume and Wash-Trading Signals
Evaluate NFT volume with transaction-level evidence, repeated counterparties and transparent exclusions, while keeping suspicious patterns separate from proven intent.
Read the guideToken Holders vs Users: Reading Adoption Metrics
Distinguish token-holding addresses from people and active users, including custody concentration, dust balances and contract-owned holdings.
Read the guideThe editorial approach
Useful questions.
Traceable explanations.
Each guide starts with a concrete developer question and separates technical observations from the interpretation an application adds. Worked examples use illustrative values; references point to standards and technical documentation.
Published by Indexbase. Explore related guides as your requirements develop, from a first data question to a more deliberate integration workflow.