Signing transactions

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Bitcoin

Tutorial

Before a transaction can be sent to the Bitcoin network, each input must be signed.

Threshold ECDSA

Canisters can sign transactions with threshold ECDSA through the sign_with_ecdsa method.

The following snippet shows a simplified example of how to sign a Bitcoin transaction for the special case where all the inputs are referencing outpoints that are owned by own_address and own_address is a P2PKH address.

Motoko

motoko/basic_bitcoin/src/basic_bitcoin/src/BitcoinWallet.mo

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See full example on GitHub

Rust

rust/basic_bitcoin/src/basic_bitcoin/src/bitcoin_wallet/p2pkh.rs

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See full example on GitHub

Threshold Schnorr

Canisters can sign transactions with threshold Schnorr through the sign_with_schnorr method.

Signing P2TR key path transactions

The following snippet shows a simplified example of how to sign a Bitcoin transaction for the special case where all the inputs are referencing outpoints that are owned by own_address and own_address is a P2TR address.

Rust

motoko/basic_bitcoin/src/basic_bitcoin/src/P2tr.mo

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See full example on GitHub

Signing P2TR script path transactions

The following snippet shows a simplified example of how to sign a Bitcoin transaction for the special case where all the inputs are referencing outpoints that are owned by own_address and own_address is a P2TR script path address.

Rust

rust/basic_bitcoin/src/basic_bitcoin/src/bitcoin_wallet/p2tr.rs

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See full example on GitHub

Learn more

Learn more about threshold ECDSA.

Learn more about threshold Schnorr.