What an RPC is, why yours is failing, and when to run a node.
RPC endpoints and nodes — the full guide to this subject.
Chainlist is a convenient tool that aggregates RPC endpoint URLs for hundreds of blockchains. You paste a c...
A common misunderstanding about Ethereum RPC is that `eth_call` costs gas. It does not. This is a read-only...
A widespread misconception holds that you need an archive node for almost anything. It is not true. Most qu...
The choice of execution client is not abstract. It determines how much disk space you need, how fast your n...
A single RPC provider is a single point of failure. If that provider goes down, rates you, or starts servin...
A Remote Procedure Call, or RPC, is a way for one program to ask another program to run a function and retu...
You are building a dapp and your RPC calls return a 403 Forbidden error. This is common when using provider...
A 429 status code means your application has exceeded the rate limit set by an RPC provider. This happens f...
If you have built an event indexer on Ethereum, you have hit this wall. You send an `eth_getLogs` request a...
You send a transaction. It fails. The only message you get back is "execution reverted." No reason string. ...
You call a method. The RPC endpoint replies with an error: the method does not exist. This is not a bug. It...
You're about to send a transaction. MetaMask spins. Nothing happens. Then you see it: "nonce too low." The ...
Chainlist is a convenient tool that aggregates RPC endpoint URLs for hundreds of blockchains. You paste a chain ID, click a button, and your wallet connects. The appeal is obvious. The risk is not always visible.
A common misunderstanding about Ethereum RPC is that `eth_call` costs gas. It does not. This is a read-only simulation. The method executes code against the Ethereum Virtual Machine (EVM) using the current state of a specific block, but nothing gets mined. No state changes, no transaction broadcast,
A widespread misconception holds that you need an archive node for almost anything. It is not true. Most queries that dapps and wallets make every day work fine against a full node. The difference is narrower than many assume, but it matters exactly when you cross certain boundaries.
The choice of execution client is not abstract. It determines how much disk space you need, how fast your node syncs, and what data you can retrieve. Geth is the reference. Erigon is the alternative that prioritises storage efficiency. Nethermind sits in between.
Every interaction you have with a blockchain - sending a transaction, checking a balance, querying past events - goes through an RPC endpoint. It's the doorway. If that door is slow, broken, or lying to you, nothing else works. This page maps the entire subject: what RPCs are, why they fail in pract
A single RPC provider is a single point of failure. If that provider goes down, rates you, or starts serving stale data, your application stops working correctly. Multi-provider failover mitigates this. You route requests to a backup provider when the primary fails.
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Bitcoin Magazine ·
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Cointelegraph ·
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Your trade happens inside the exchange's own ledger. Nothing touches the blockchain until you withdraw.
You swap from your own wallet. The transaction settles on the chain and you pay its fee.
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