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ICP Developer Docs

Token Ledgers

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Interact with token ledgers from canisters and frontends. Cover ICP ledger transfers, ICRC-1 fungible token transfers, ICRC-2 approve/transferFrom pattern, fee handling, subaccount management, and setting up a local test ledger. Show code for both Rust and Motoko canister-side, and JS using @icp-sdk/canisters. Open with a “building DeFi on ICP” overview that maps common patterns. Include a section on ICRC-7/ICRC-37 (NFTs) — creating and managing non-fungible token collections, minting, transferring, and approval patterns. Reference the nft-creator example.

  • Portal: defi/tokens/ (multiple files on token standards, transfers, ledger setup)
  • icskills: icrc-ledger
  • JS SDK: @icp-sdk/canisters (https://js.icp.build/canisters)
  • Examples: icp_transfer (both), token_transfer (both), token_transfer_from (both), icrc2-swap (Motoko), receiving-icp (Rust), ic-pos (Motoko), nft-creator (Motoko), tokenmania (both)
  • Learn Hub: How Token Ledgers Work
  • reference/token-standards — ICRC standard specifications
  • guides/defi/chain-key-tokens — ckBTC/ckETH ledger interaction
  • guides/canister-calls/onchain-calls — ledger calls are inter-canister calls