How to call the canister by dfx using candid file?

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1

I want to call the Ledger Canister to transfer icps by dfx.

My command is:

$ dfx canister --network=https://ic0.app --no-wallet call ryjl3-tyaaa-aaaaa-aaaba-cai send_dfx '(record {memo=0; amount=record {e8s=110000}; fee=record {e8s=10000}; to="05cf7b06399ebc51e81e7008407d2bf2ebe60e9886931f14e12402750df6a1de"})'
The Replica returned an error: code 5, message: "Canister ryjl3-tyaaa-aaaaa-aaaba-cai trapped explicitly: Panicked at 'Deserialization Failed: "Deserialize error: Type mismatch. Type on the wire: Int; Expected type: Nat64"', /builds/dfinity-lab/dfinity/rs/rust_canisters/dfn_core/src/endpoint.rs:123:21"

I guess the error is caused by the dfx did not find the .did file, so the number (Int) was not converted to Nat64 correctly.

I know there are others ways to transfering icp, such as dfx ledger transfer <args>, But I want to transfer in two steps, signing first, then sending the message to ledger canister.

More importantly, I want to know the universal interaction with canister, as I know the canister id and canister interface(the .did file).

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2

dfx cannot fetch did files for external canisters. We are adding better support for this. For now, the work around is to put type annotations for all numbers, e.g. amount=record {e8s=110000:nat64}

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3

This solved my problem perfectly :motoko:

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