Blockchain Infrastructure
An RPC rate limit can interrupt a dashboard without stopping the blockchain
A blockchain dashboard can hit an RPC provider’s rate limit while the network keeps running. Learn what a 429 response does and does not establish.
TOKENS · NETWORKS · CONTEXT
Journal
Blockchain Literacy
A Blockchain Explorer’s Token Name Is Not Proof of Authenticity
A token name and ticker can be copied. Check the network and contract address through independent official sources before relying on an explorer label.
Blockchain Foundations
A Smart-Contract Read Call Does Not Always Require a Paid Transaction
Distinguish a smart-contract read call from a submitted transaction, including gas accounting, provider charges and the state used for a query.
Blockchain Interfaces
A Contract ABI Helps Software Interpret Calls and Returned Data
Understand how a contract ABI describes callable functions and data types, and why decoding a call does not establish that a contract is safe.
Blockchain Mechanics
A Blockchain Reorganisation Can Change Which Block Contains a Transaction
Understand how a chain reorganisation can change recent transaction inclusion, and why applications track block identity as well as transaction hashes.
NFT Mechanics
An ERC-721 Token ID Needs Its Contract and Network Beside It
An ERC-721 token number identifies an NFT within a contract. Keep the network and contract address with it when comparing listings or records.
Blockchain Data Structures
A Merkle Proof Checks Inclusion Against a Particular Root
A Merkle proof checks an item’s relationship to a specific root. That root still needs context before the proof supports a wider claim.
Transaction basics
Gas Used and the Gas Limit Are Different Numbers in a Transaction
Read an Ethereum transaction’s gas limit separately from gas used and the price paid per unit when checking its execution cost.
Blockchain Mechanics
Chain ID Helps Keep an Ethereum Transaction on Its Intended Network
Ethereum chain IDs help distinguish transaction signing contexts. They are different from token symbols and do not prove a network is trustworthy.