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SonicBeginnerSonic is a new EVM chain from the Fantom team: S replaced FTM 1:1, a rewritten client targets higher throughput with aBFT finality, apps can earn up to 90% of their gas fees, and the Sonic Gateway bridges to Ethereum.
#basics#bridges#gas-&-fees
Ethereum ClassicBeginnerETC is the original chain that rejected the 2016 DAO-hack fork. It stays proof of work on Etchash, caps supply near 210.7M, uses chain ID 61 and legacy gas pricing, and needs deeper confirmations.
#basics#mining#security
Bitcoin CashBeginnerBCH forked in August 2017 to scale with bigger blocks instead of SegWit. Today it has a 32 MB adaptive limit, native CashTokens, CashAddr addresses, no SegWit or RBF, low fees and far less hashrate than BTC.
#basics#scaling#tokens
GeneralBeginnerKeep a small hot wallet for operations and hold the treasury behind several hardware-backed keys, held by different people, through multisig or MPC, with spend policies, transaction simulation and a tested recovery plan.
#enterprise-blockchain#security#wallets
ArweaveBeginnerYou pay once into an endowment sized for about 200 years of storage, betting on falling disk costs, and mining requires holding data. Prices move with AR, most uploads go through bundlers, and nothing can be deleted.
#basics#privacy#storage
TezosBeginnerTezos bakers vote on protocol upgrades on-chain, weighted by stake, through proposal, exploration, cooldown, promotion and adoption periods. Once approved, every node switches automatically, so the chain doesn't split.
#consensus#governance#staking
EthereumBeginnerEtherscan recompiles your source and compares bytecode. Verify with forge --verify or hardhat verify and a V2 API key; mismatches come from compiler version, optimizer, viaIR, EVM version, constructor args or paths.
#dev-tools#smart-contracts#troubleshooting
LitecoinBeginnerLitecoin is Bitcoin's code with Scrypt proof of work, 2.5-minute blocks and an 84M supply, plus opt-in MWEB privacy and its own address prefixes (L, M, ltc1). Confirmations, fees and libraries need small adjustments.
#basics#mining#privacy
EthereumBeginnerIt's usually a max fee below the base fee, a low tip, or an earlier stuck nonce. Speed up by resending with the same nonce and higher fees; cancel by sending 0 ETH to yourself with that nonce.
#gas-&-fees#transactions#troubleshooting
IPFSBeginnerA CID is only an address; content survives only while someone pins it. Use CIDv1 and ipfs:// URIs, pin with at least two independent providers, keep a CAR backup, and test retrieval first.
#dapp-development#nfts#storage
EthereumBeginnerChoose Foundry if your team lives in Solidity and wants fast fuzz and invariant tests; choose Hardhat if contracts ship inside a TypeScript stack. Many teams use both with shared compiler settings.
#dev-tools#solidity#testing
