Chain-Key Tokens

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Work with chain-key tokens (ckBTC, ckETH) that represent assets from other chains on ICP. Cover minting (depositing BTC/ETH to get ckBTC/ckETH), redemption (burning ck tokens to withdraw), ledger interaction for transfers, and subaccount derivation for user deposits. Explain the trust model and how chain-key tokens maintain their peg.

• Portal: defi/chain-key-tokens/ files
• icskills: ckbtc
• JS SDK: @icp-sdk/canisters (https://js.icp.build/canisters)
• Examples: token_transfer (both)
• Learn Hub: Chain-Key Tokens

• guides/chain-fusion/bitcoin — native BTC integration (alternative to ckBTC)
• guides/chain-fusion/ethereum — native ETH integration (alternative to ckETH)
• guides/defi/token-ledgers — ck tokens are ICRC-1 tokens