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matthieu / gist:b07c5ba27bc99188a15f
Last active Sep 21, 2019
Create and send a Bitcoin transaction using the BlockCypher Transaction API
View gist:b07c5ba27bc99188a15f
# In this example we're sending some test bitcoins from an address we control to a brand new test
# address. We'll be sending the coins using the following address, public and private keys (please
# don't abuse).
# address : mtWg6ccLiZWw2Et7E5UqmHsYgrAi5wqiov
# public : 03bb318b00de944086fad67ab78a832eb1bf26916053ecd3b14a3f48f9fbe0821f
# private : 1af97b1f428ac89b7d35323ea7a68aba8cad178a04eddbbf591f65671bae48a2
# 1. generate a one-shot dummy address we're going to send money to
$ curl -X POST
matthieu / gist:d78bd39a6709c5be3dcd
Created Mar 7, 2015
Sending op_return transactions with BlockCypher
View gist:d78bd39a6709c5be3dcd
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Block Cypher</title>
<!-- Bootstrap -->
<link href="css/bootstrap.css" rel="stylesheet">
matthieu / eth-split
Last active Jul 27, 2016
Calling the Ethereum splitting contract using BlockCypher
View eth-split
# Contract at:
# See also
$ cat split.json
"private": "...",
"gas_amount": 200000,
"params": ["3f071e84604d712ee034d776ed8f6405e1444c48", "34de916d2afc28564b118a4f2723d0274b223f32"],
matthieu / bc-contract-doc
Created Jul 12, 2016
Contract creation with BlockCypher
View bc-contract-doc
# The contract API includes the following endpoints (API token always required):
# POST /v1/eth/main/contracts
# Creates a new contract. Expects the solidity definition, the private key paying for the publication, the name of the
# contract to be published, the gas amount to use and eventual constructor parameters. The solidity code is compiled
# and the contract creation transaction built and broadcasted. Both the code and the ABI are saved for further
# retrieval. If invoked without contracts to publish, simply compiles and returns the result of compilation.
# Otherwise, along with the compilation results, will return the contract address and creation transaction hash and the
# contract methods will be exposed as endpoints (see below).
package dyn;
import org.objectweb.asm.*;
import org.objectweb.asm.util.TraceClassVisitor;
import sun.dyn.anon.AnonymousClassLoader;
public class Indy implements Opcodes {
View gist:455329
package spike
import util.Random
class Neuron(nm: String, ns: List[Neuron], rnd: Random) {
val (a, b, rate) = (1.7159, 2.0/3.0, 0.1)
val dendrites = connect(ns)
val name = nm
// need to remember output and gather error for training
View gist:4c98575af988f3e6b194
Verifying I am +matthieu on my passcard.
matthieu / gist:f18b54cb91c31d39ba54
Last active Aug 29, 2015
Validate the tosign data returned by BlockCypher
View gist:f18b54cb91c31d39ba54
# create the transaction
$ curl -d '{"inputs": [{"addresses": ["mtWg6ccLiZWw2Et7E5UqmHsYgrAi5wqiov"]}],
"outputs":[{"addresses": ["mzUqjgiGc3Mqh5zMiP5vXDNd7Hwx3K1xCU"], "value": 25000}]}' \
"tx": {
"block_height": -1,
"hash": "568acff13300b471d384e16a1a6d449be704e97b819f051dc4f1fb246726e471",
"addresses": [

Keybase proof

I hereby claim:

  • I am matthieu on github.
  • I am mriou ( on keybase.
  • I have a public key whose fingerprint is 45B8 A602 A54E FB5E 0DEC 4970 E272 A45F 78F3 61CB

To claim this, I am signing this object:

matthieu /
Last active Aug 29, 2015
Decrypts and send the send_a_candy JSON to BlockCypher to create a microtransaction
openssl enc -d -aes-256-cbc -base64 -in send_a_candy.json.aes256 2>&1 | \
curl -H "Content-Type: application/json" -d @-$1
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