Chain - Medium

[...] At Chain, we’re building a powerful API that makes it easy to interact with block chain data. But indexing the block chain is not an easy task. This article explores the problems we [...]

[...] . Original digital works will be bought and sold by tracking ownership and provenance on the block chain. Bitcoin will allow people to own more income-producing assets and less unproductive stuff. The [...]

[...] Our aim at Chain is to be the best place to build and scale block chain apps. To provide such a service requires that we measure our systems against the highest level [...]

[...] ability to transfer control of it to someone else by creating a record of the transfer in the block chain. What grants this ability? Access to an ECDSA private and public key pair. What does that mean [...]

[...] to send bitcoin transactions needed access to a bitcoind node. However, developers who use the Chain API are now a single HTTP call away from sending their transactions to the block chain. The Send [...]

[...] couldn’t be happier to introduce the Chain iOS SDK, which makes it simple to interact with the Chain API to get address balances, find unspent outputs, send transactions to the network, and retrieve [...]

[...] the HTTP Strict Transport Security header to ensure that browsers always connect using TLS. The Chain API requires a bearer token to authenticate HTTP requests. This token is used solely for customer [...]

[...] . This experiment marks our first step towards providing new information using aggregated block chain data. We are working on adding even more powerful data to provide further confidence in the near [...]

[...] At Chain, we’re building a powerful API that makes it easy to interact with block chain data. But indexing the block chain is not an easy task. This article explores the problems we are [...]

[...] bitcoind) We then alert on call engineers if our data becomes out of sync with the trusted block chain data. Customer Data Privacy In addition to protecting all communications, we also take care to [...]

[...] Level Visibility Every unit of code we run in production is instrumented. For example, the GET Address API reports throughput and latency, grouped by customer token. This allows us to proactively [...]

[...] now built a transaction ready to be sent. Combining this with the Send Transaction API and Get Address API we have a complete set of tools to build a simple wallet or a completely new Bitcoin [...]

[...] transaction will be confirmed in a block, and consequently our Get Address API will report the balance as confirmed. Here is an example Node.js script that demonstrates how [...]

[...] , create a Bitcoin transaction in your application, and relay it to the network. Last week’s Chain post, titled Sending [...]

[...] The average time it takes for a bitcoin transaction to be confirmed in the block chain is about 5 minutes (blocks are mined on average every 10 [...]

[...] a double spend wallet. This wallet acts maliciously in that it keeps a list of disjoint bitcoin nodes and uses the disjoint nodes to propagate double spends. The attacker could use this imaginary [...]

[...] have bought or sold bitcoin as a speculator, you have helped enable the emerging ecosystem of bitcoin apps.  While speculative bubbles will swell and pop from time to time (see: 2013-2014), this does [...]

[...] to the network, and retrieve transaction histories — all without running any Bitcoin infrastructure. So check out the example below and let us know what other features you’d like [...]

[...] want leveraged exposure to bitcoin.  In other words, the only people that will experience bitcoin volatility will be those who choose to.  This is no different than any other financial market [...]