Engraving Methods
EternalChain supports six ways to inscribe your words across three blockchains. Each has different strengths in durability, speed, cost, and features.
OP_RETURN
The simplest way to store data on Bitcoin. OP_RETURN creates a provably unspendable output containing up to 80 bytes of your message as plaintext. It’s clean, lightweight, and readable by anyone on any block explorer.
The trade-off: since OP_RETURN outputs aren’t part of the UTXO set, some nodes may prune them over time. Your data is always in the blockchain history, but not every node may serve it.
Stamps (Multisig)
The most durable option. Stamps embeds data in bare multisig outputs that live in the UTXO set — meaning they cannot be pruned by any Bitcoin node. Your inscription is truly permanent and uncensorable.
The data is encrypted using ARC4, a reversible cipher keyed by the transaction ID. This is a protocol convention, not for security — anyone can decrypt it.
ETH Calldata
Your inscription is stored directly in the input data field of an Ethereum transaction. It’s the most straightforward Ethereum method — readable on Etherscan by clicking “View Input As → UTF-8.”
ETH Event
Your inscription is emitted as a smart contract event, making it searchable and indexable by blockchain analytics tools like The Graph and Dune. Best when discoverability matters — all EternalChain event inscriptions are queryable as a collection.
SOL Memo
The fastest and most affordable option. Your inscription is attached via Solana’s built-in Memo program — confirmed in seconds, readable on all Solana explorers, and costs just $5.
SOL cNFT
Your inscription is minted as a compressed NFT — a real digital collectible that appears in your Solana wallet. You can view it, display it, or transfer it to someone else. The only method that gives you a tangible, ownable token.
Comparison
Confirmation Times
Different blockchains have different speeds:
Bitcoin targets one block every ~10 minutes. Your inscription will typically confirm within 10–30 minutes. After 6 confirmations (~1 hour), it’s considered final.
Ethereum produces a block roughly every 12 seconds. Your inscription confirms in under a minute, with full finality in about 15 minutes.
Solana processes blocks every ~400 milliseconds. Confirmation happens in seconds, with finality in about 13 seconds — the fastest option.