Chain Guides
Ethereum JSON-RPC & logs
Understand Ethereum request context, hexadecimal quantities, contract reads, and reproducible event indexing.
Read the guideTHE COMPLETE COLLECTION / 10 ORIGINAL GUIDES
Crypto Field Notes.
Practical thinking for people building with crypto data. Chain guides, API design, token research, and the context behind the next integration.
All Crypto Field Notes
News & Research
Crypto news with receipts
Design a cryptocurrency news pipeline that preserves publishers, timestamps, corrections, entity identity, and the difference between coverage and confirmation.
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Chain Guides
Bitcoin blocks & confirmations
Build a read-only Bitcoin observer that preserves block identity, separates pending activity, and handles changes in chain state.
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Digital Assets
DeFi metrics that mean something
Avoid misleading DeFi dashboards by defining metric boundaries, valuation inputs, liquidity context, and protocol dependencies.
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API Engineering
Data feeds without blind spots
Design crypto data feeds that distinguish fresh observations from stale displays and recover from missing or out-of-order updates.
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Digital Assets
Meme coin data, not hype
Research meme coin data without confusing a trending listing, familiar symbol, or rising chart with verified identity or safety.
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API Engineering
Crypto API fundamentals
Separate blockchain state, market prices, indexed activity, and news before choosing a cryptocurrency API.
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Digital Assets
Staking beyond the headline yield
Measure staking rewards without confusing estimated rates, realized token returns, fees, liquidity, and changes in asset value.
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Chain Guides
Solana accounts & commitment
Read Solana account data with explicit commitment, context slots, pagination, and a clear distinction between native and token balances.
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Digital Assets
Real-world assets, real evidence
Design tokenized real-world asset records around issuer evidence, legal claims, valuations, redemption terms, and on-chain identity.
Read the guideEach field note includes a primary-source reference and distinguishes protocol facts from proposed implementation practices. Dates are publication dates, not timestamps for live data. Read the editorial policy ↗