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Bitcoin Address Derivation from Public Key
Raw
_README.md

Bitcoin Address Derivation from Public Key

This gist shows how to derive a Bitcoin address using bitcoinjs-lib.

Context

Turnkey doesn't support Bitcoin address derivation yet, but it does give raw public keys. This means Bitcoin addresses can be derived on the client side. This code sample is provided as courtesy and should not be considered authoritative or production ready.

Any address derivation logic is critical because sending cryptocurrency to an address derived incorrectly can lead to permanent loss of funds. At minimum, any address derivation logic should be tested to make sure funds land on the derived deposit address correctly and that funds can be transferred back out without issues.

Legal Disclaimer

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL TURNKEY BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

See also: Turnkey's terms of service

Raw
index.js
const bitcoin = require("bitcoinjs-lib");
const prompts = require("prompts");
const ecc = require("tiny-secp256k1");
const ecpair = require("ecpair");
const ECPair = ecpair.ECPairFactory(ecc);
async function run() {
const cliPrompts = [
{
type: "text",
name: "publicKey",
message:
"Raw public key (hex-encoded)",
},
];
const { publicKey } = await prompts(cliPrompts);
const pair = ECPair.fromPublicKey(Buffer.from(publicKey, "hex"));
const p2shAddress = bitcoin.payments.p2sh({
redeem: bitcoin.payments.p2wpkh({
pubkey: pair.publicKey,
network: bitcoin.networks.testnet,
}),
}).address;
console.log("Testnet P2SH address: " + p2shAddress);
// FYI here's how you'd derive a P2PKH address (Pay-to-Public-Key-Hash)
// P2PKH addresses are still in use in the Bitcoin ecosystem, but are
// being phased out in favor of P2SH or native SegWit addresses.
// ----
// let p2pkhAddress = bitcoin.payments.p2pkh({
// pubkey: pair.publicKey,
// network: bitcoin.networks.testnet,
// }).address;
// console.log("Testnet P2PKH address: " + p2pkhAddress);
}
run().then((res) => console.log("...done!"));
Raw
package-lock.json
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Raw
package.json
{
"name": "derive",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "Arnaud Brousseau",
"license": "ISC",
"dependencies": {
"bitcoinjs-lib": "^6.1.1",
"ecpair": "^2.1.0",
"prompts": "^2.4.2",
"tiny-secp256k1": "^2.2.2"
}
}
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