imtoken

Blockchain Knowledge

Blockchain basics covering public chains, transaction hashes, gas, DApps, NFTs, EVM and Layer2.

Blockchain & Public Chains

A blockchain records transactions in ordered blocks. Public chains allow open verification of transaction state. Different networks use different consensus mechanisms, fee models and confirmation speeds. Wallets manage addresses and signatures, while transactions are processed by the corresponding network.

Addresses, Hashes & Explorers

Addresses receive assets, while transaction hashes identify on-chain transactions. Block explorers can show balances, transaction status, block height and confirmations. Use an explorer that matches the network where the transaction occurred.

Gas & Network Fees

Network fees pay for blockchain transactions or contract execution. EVM networks typically use their native asset for gas. Fees depend on congestion, transaction complexity and fee settings. Lower fees may increase waiting time, while higher fees do not guarantee success.

DApps, NFTs & Smart Contracts

DApps use smart contracts for on-chain functionality. NFTs can represent unique on-chain records or assets. DApp interactions may involve signatures, approvals and contract calls that create asset risk, so verify the site source, contract address and permission scope.

EVM & Layer2

EVM allows compatible networks to use similar smart-contract execution, but each network still has independent parameters, gas assets and contract deployments. Layer2 networks expand transaction capacity and cross-layer activity commonly involves bridges, waiting periods and smart-contract risk.

Security reminder: Never disclose recovery phrases, private keys or verification codes. Verify network, address and amount before transfers, and understand risks before using third-party DApps, contracts, bridges or staking services.