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Using FMZ APIs to Read Ethereum Data and Interact with Smart Contracts

Article FMZ digest · Author: 发明者量化-小小梦
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Summary

This tutorial introduces Ethereum interaction through FMZ, starting with platform components, hosted runners, Web3 connection settings, and the debugging tool. It demonstrates reading account balances, chain identifiers, gas prices, block heights, and block contents through JSON-RPC methods. It also explains converting hexadecimal values and handling large integers to avoid precision loss.

The later examples show how to resolve an Ethereum Name Service name by hashing it, registering a contract ABI, and calling contract methods. The document also discusses transaction and decentralized exchange activity, including interpreting a Uniswap router transaction that batches swap and token-unwrapping calls. These examples provide a practical path from basic chain queries to contract reads and transaction analysis. They are implementation demonstrations, not investment guidance; safe key handling, correct network selection, and careful validation of contract data remain essential.

Key ideas

  • FMZ can call Ethereum JSON-RPC methods to retrieve balances, network identifiers, gas prices, and block data.
  • Hexadecimal token amounts need appropriate conversion, and large values require precision-aware handling.
  • ENS resolution uses name hashing and smart-contract calls guided by a registered ABI.
  • Transaction input data can reveal batched decentralized exchange operations and their parameters.
  • The examples depend on a configured RPC node and careful selection of network and contract details.

Tags

CryptoDeFiOn-chain dataExecution

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.