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< / script > < / nav > < / div > < div class = "container mainContainer docsContainer" > < div class = "wrapper" > < div class = "post" > < header class = "postHeader" > < a class = "edit-page-link button" href = "https://github.com/bitcoin-s/bitcoin-s/blob/master/docs/wallet/dlc.md" target = "_blank" rel = "noreferrer noopener" > Edit< / a > < h1 id = "__docusaurus" class = "postHeaderTitle" > Executing A DLC with Bitcoin-S< / h1 > < / header > < article > < div > < span > < h2 > < a class = "anchor" aria-hidden = "true" id = "executing-a-discreet-log-contract-dlc" > < / a > < a href = "#executing-a-discreet-log-contract-dlc" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Executing A Discreet Log Contract (DLC)< / h2 >
< h2 > < a class = "anchor" aria-hidden = "true" id = "step-1-get-bitcoin-s-setup" > < / a > < a href = "#step-1-get-bitcoin-s-setup" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Step 1: Get Bitcoin-S Setup< / h2 >
< p > See the < a href = "../getting-setup" > setup document< / a > .< / p >
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< p > Make sure to follow < a href = "../getting-setup#step-4-optional-discreet-log-contract-branch" > Step 4< / a > to checkout the < code > adaptor-dlc< / code > feature branch.< / p >
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< h2 > < a class = "anchor" aria-hidden = "true" id = "step-2-agree-on-contract-terms" > < / a > < a href = "#step-2-agree-on-contract-terms" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Step 2: Agree On Contract Terms< / h2 >
< p > Both parties must agree on all fields from the table below:< / p >
< table >
< thead >
< tr > < th style = "text-align:center" > Field Name< / th > < th style = "text-align:center" > Format< / th > < / tr >
< / thead >
< tbody >
< tr > < td style = "text-align:center" > oracleInfo< / td > < td style = "text-align:center" > OraclePubKeyHex ++ OracleRValueHex< / td > < / tr >
< tr > < td style = "text-align:center" > contractInfo< / td > < td style = "text-align:center" > Hash1Hex ++ 8ByteValue1Hex ++ Hash2Hex ++ 8ByteValue2Hex< / td > < / tr >
< tr > < td style = "text-align:center" > collateral< / td > < td style = "text-align:center" > NumInSatoshis< / td > < / tr >
< tr > < td style = "text-align:center" > locktime< / td > < td style = "text-align:center" > LockTimeNum< / td > < / tr >
< tr > < td style = "text-align:center" > refundlocktime< / td > < td style = "text-align:center" > LockTimeNum< / td > < / tr >
< tr > < td style = "text-align:center" > feerate< / td > < td style = "text-align:center" > NumInSatoshisPerVByte< / td > < / tr >
< / tbody >
< / table >
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< p > Here is an example < code > oracleInfo< / code > for public key < code > 02debeef17d7be7ced0bf346395a5c5c7177491953e91f0af2b098aac5d23cab< / code > and R value < code > b1a63752e5a760f47252545b7cda933afeaf06dba3b6c6fd5356781f240c2750< / code > :< / p >
< pre > < code class = "hljs css language-bashrc" > < span class = "hljs-number" > 02< / span > debeef< span class = "hljs-number" > 17< / span > d< span class = "hljs-number" > 7< / span > be< span class = "hljs-number" > 7< / span > ced< span class = "hljs-number" > 0< / span > bf< span class = "hljs-number" > 346395< / span > a< span class = "hljs-number" > 5< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 5< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 7177491953e91< / span > f< span class = "hljs-number" > 0< / span > af< span class = "hljs-number" > 2< / span > b< span class = "hljs-number" > 098< / span > aac< span class = "hljs-number" > 5< / span > d< span class = "hljs-number" > 23< / span > cabb< span class = "hljs-number" > 1< / span > a< span class = "hljs-number" > 63752e5< / span > a< span class = "hljs-number" > 760< / span > f< span class = "hljs-number" > 47252545< / span > b< span class = "hljs-number" > 7< / span > cda< span class = "hljs-number" > 933< / span > afeaf< span class = "hljs-number" > 06< / span > dba< span class = "hljs-number" > 3< / span > b< span class = "hljs-number" > 6< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 6< / span > fd< span class = "hljs-number" > 5356781< / span > f< span class = "hljs-number" > 240< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 2750< / span >
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< / code > < / pre >
< p > Here is an example < code > contractInfo< / code > for hashes < code > c07803e32c12e100905e8d69fe38ae72f2e7a17eb7b8dc1a9bce134b0cbe920f< / code > and < code > 5c58e41254e7a117ee1db59874f2334facc1576c238c16d18767b47861f93f7c< / code > with respective Satoshi denominated outcomes of < code > 100000 sats< / code > and < code > 0 sats< / code > :< / p >
< pre > < code class = "hljs css language-bashrc" > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 07803e32< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 12e100905< / span > e< span class = "hljs-number" > 8< / span > d< span class = "hljs-number" > 69< / span > fe< span class = "hljs-number" > 38< / span > ae< span class = "hljs-number" > 72< / span > f< span class = "hljs-number" > 2e7< / span > a< span class = "hljs-number" > 17< / span > eb< span class = "hljs-number" > 7< / span > b< span class = "hljs-number" > 8< / span > dc< span class = "hljs-number" > 1< / span > a< span class = "hljs-number" > 9< / span > bce< span class = "hljs-number" > 134< / span > b< span class = "hljs-number" > 0< / span > cbe< span class = "hljs-number" > 920< / span > fa< span class = "hljs-number" > 0860100000000005< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 58e41254< / span > e< span class = "hljs-number" > 7< / span > a< span class = "hljs-number" > 117< / span > ee< span class = "hljs-number" > 1< / span > db< span class = "hljs-number" > 59874< / span > f< span class = "hljs-number" > 2334< / span > facc< span class = "hljs-number" > 1576< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 238< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 16< / span > d< span class = "hljs-number" > 18767< / span > b< span class = "hljs-number" > 47861< / span > f< span class = "hljs-number" > 93< / span > f< span class = "hljs-number" > 7< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 0000000000000000< / span >
< / code > < / pre >
< p > And finally, here are the oracle signatures for each hash in order in case you want to test with this contract:< / p >
< pre > < code class = "hljs css language-bashrc" > f< span class = "hljs-number" > 8758< / span > d< span class = "hljs-number" > 7< / span > f< span class = "hljs-number" > 03< / span > a< span class = "hljs-number" > 65< / span > b< span class = "hljs-number" > 67< / span > b< span class = "hljs-number" > 90< / span > f< span class = "hljs-number" > 62301< / span > a< span class = "hljs-number" > 3554849< / span > bde< span class = "hljs-number" > 6< / span > d< span class = "hljs-number" > 00< / span > d< span class = "hljs-number" > 50e965< / span > eb< span class = "hljs-number" > 123398< / span > de< span class = "hljs-number" > 9< / span > fd< span class = "hljs-number" > 6< / span > ea< span class = "hljs-number" > 7< / span > fbbee< span class = "hljs-number" > 821< / span > b< span class = "hljs-number" > 7166028< / span > a< span class = "hljs-number" > 6927282830< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 9452< / span > cfcf< span class = "hljs-number" > 3< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 5716< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 57e43< / span > dd< span class = "hljs-number" > 4069< / span > ca< span class = "hljs-number" > 87625010< / span >
< / code > < / pre >
< pre > < code class = "hljs css language-bashrc" > < span class = "hljs-attribute" > f8758d7f03a65b67b90f62301a3554849bde6d00d50e965eb123398de9fd6ea7af05f01f1ca852cf5454a7dc91cdad7903dc2e67ddb2b3bc9d61dabd8856aa6a< / span >
< / code > < / pre >
< p > Note: if you wish to setup your own oracle for testing, you can do so by pasting the following into the < code > sbt core/console< / code > :< / p >
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< pre > < code class = "hljs css language-scala" > < span class = "hljs-keyword" > import< / span > org.bitcoins.crypto._
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< span class = "hljs-keyword" > import< / span > org.bitcoins.core.currency._
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< span class = "hljs-keyword" > import< / span > scodec.bits._
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< span class = "hljs-keyword" > val< / span > privKey = < span class = "hljs-type" > ECPrivateKey< / span > .freshPrivateKey
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< span class = "hljs-keyword" > val< / span > pubKey = privKey.schnorrPublicKey
< span class = "hljs-keyword" > val< / span > kValue = < span class = "hljs-type" > ECPrivateKey< / span > .freshPrivateKey
< span class = "hljs-keyword" > val< / span > rValue = kValue.schnorrNonce
< span class = "hljs-comment" > //the hash the oracle will sign when the bitcoin price is over $9,000< / span >
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< span class = "hljs-keyword" > val< / span > winHash = < span class = "hljs-type" > CryptoUtil< / span > .sha256(< span class = "hljs-type" > ByteVector< / span > (< span class = "hljs-string" > " BTC_OVER_9000" < / span > .getBytes)).flip
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< span class = "hljs-comment" > //the hash the oracle with sign when the bitcoin price is under $9,000< / span >
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< span class = "hljs-keyword" > val< / span > loseHash = < span class = "hljs-type" > CryptoUtil< / span > .sha256(< span class = "hljs-type" > ByteVector< / span > (< span class = "hljs-string" > " BTC_UNDER_9000" < / span > .getBytes)).flip
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< span class = "hljs-comment" > //the amounts received in the case the oracle signs hash of message " BTC_OVER_9000" < / span >
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< span class = "hljs-keyword" > val< / span > amtReceivedOnWin = < span class = "hljs-type" > Satoshis< / span > (< span class = "hljs-number" > 100000< / span > )
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< span class = "hljs-comment" > //the amount received in the case the oracle signs hash of message " BTC_UNDER_9000" < / span >
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< span class = "hljs-keyword" > val< / span > amtReceivedOnLoss = < span class = "hljs-type" > Satoshis< / span > .zero
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(pubKey.bytes ++ rValue.bytes).toHex
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(winHash.bytes ++ amtReceivedOnWin.bytes ++ loseHash.bytes ++ amtReceivedOnLoss.bytes).toHex
privKey.schnorrSignWithNonce(winHash.bytes, kValue)
privKey.schnorrSignWithNonce(loseHash.bytes, kValue)
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< / code > < / pre >
< p > Where you can replace the messages < code > WIN< / code > and < code > LOSE< / code > to have the oracle sign any two messages, and replace < code > Satoshis(100000)< / code > and < code > Satoshis.zero< / code > to change the outcomes.< / p >
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< h2 > < a class = "anchor" aria-hidden = "true" id = "using-the-gui" > < / a > < a href = "#using-the-gui" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Using the GUI< / h2 >
< p > To first start up the GUI you first need to start your bitcoin-s server and gui with< / p >
< pre > < code class = "hljs css language-bashrc" > sbt bundle/< span class = "hljs-keyword" > run< / span > < span class = "bash" >
< / span > < / code > < / pre >
< p > or if your bitcoin-s server is already running, you can run the standalone gui with< / p >
< pre > < code class = "hljs css language-bashrc" > sbt gui/< span class = "hljs-keyword" > run< / span > < span class = "bash" >
< / span > < / code > < / pre >
< p > or by following the instructions for building and running the GUI < a href = "../getting-setup#step-5-setting-up-a-bitcoin-s-server-neutrino-node" > here< / a > < / p >
< h3 > < a class = "anchor" aria-hidden = "true" id = "step-3-setup-the-dlc" > < / a > < a href = "#step-3-setup-the-dlc" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Step 3: Setup The DLC< / h3 >
< p > If you're a visual learner there is a < a href = "https://www.youtube.com/watch?v=zy1sL2ndcDg" > video demo< / a > that explains this process in detail. But do note that this demonstrates the old non-adaptor version of DLCs so that the Offer, Accept, Sign protocol is the same, but the contents will be different.< / p >
< h4 > < a class = "anchor" aria-hidden = "true" id = "creating-the-offer" > < / a > < a href = "#creating-the-offer" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Creating The Offer< / h4 >
< p > Once the terms are agreed to, either party can use the < code > Offer< / code > button and enter each of the fields from the table above.< / p >
< h4 > < a class = "anchor" aria-hidden = "true" id = "accepting-the-offer" > < / a > < a href = "#accepting-the-offer" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Accepting The Offer< / h4 >
< p > Upon receiving a DLC Offer from your counter-party, you can use the < code > Accept< / code > button and paste in the DLC Offer.< / p >
< h4 > < a class = "anchor" aria-hidden = "true" id = "signing-the-dlc" > < / a > < a href = "#signing-the-dlc" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Signing The DLC< / h4 >
< p > Upon receiving a DLC Accept message from your counter-party, you can use the < code > Sign< / code > button and paste in the DLC Accept.< / p >
< h4 > < a class = "anchor" aria-hidden = "true" id = "adding-dlc-signatures-to-your-database" > < / a > < a href = "#adding-dlc-signatures-to-your-database" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Adding DLC Signatures To Your Database< / h4 >
< p > Upon receiving a DLC Sign message from your counter-party, add their signatures to your database using the < code > Add Sigs< / code > button and paste in the message.
After doing so you can get the fully signed funding transaction using the < code > Get Funding Tx< / code > button. This will return the fully signed serialized transaction.< / p >
< h3 > < a class = "anchor" aria-hidden = "true" id = "step-4-executing-the-dlc" > < / a > < a href = "#step-4-executing-the-dlc" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Step 4: Executing the DLC< / h3 >
< h4 > < a class = "anchor" aria-hidden = "true" id = "execute" > < / a > < a href = "#execute" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Execute< / h4 >
< p > You can execute the DLC unilaterally with the < code > Execute< / code > button which will require the oracle signature.
This will return a fully signed Contract Execution Transaction for the event signed by the oracle.< / p >
< h4 > < a class = "anchor" aria-hidden = "true" id = "refund" > < / a > < a href = "#refund" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Refund< / h4 >
< p > If the < code > refundlocktime< / code > for the DLC has been reached, you can get the fully-signed refund transaction with the < code > Refund< / code > button.< / p >
< h2 > < a class = "anchor" aria-hidden = "true" id = "using-the-cli" > < / a > < a href = "#using-the-cli" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Using the CLI< / h2 >
< h3 > < a class = "anchor" aria-hidden = "true" id = "step-3-setup-the-dlc-1" > < / a > < a href = "#step-3-setup-the-dlc-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Step 3: Setup The DLC< / h3 >
< h4 > < a class = "anchor" aria-hidden = "true" id = "creating-the-offer-1" > < / a > < a href = "#creating-the-offer-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Creating The Offer< / h4 >
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< p > Once these terms are agreed to, either party can call on < code > createdlcoffer< / code > with flags for each of the fields in the table above. For example:< / p >
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< pre > < code class = "hljs css language-bashrc" > ./app/cli/< span class = "hljs-keyword" > target< / span > /universal/stage/bitcoin-s-cli createdlcoffer --oracleInfo < span class = "hljs-number" > 02< / span > debeef< span class = "hljs-number" > 17< / span > d< span class = "hljs-number" > 7< / span > be< span class = "hljs-number" > 7< / span > ced< span class = "hljs-number" > 0< / span > bf< span class = "hljs-number" > 346395< / span > a< span class = "hljs-number" > 5< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 5< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 7177491953e91< / span > f< span class = "hljs-number" > 0< / span > af< span class = "hljs-number" > 2< / span > b< span class = "hljs-number" > 098< / span > aac< span class = "hljs-number" > 5< / span > d< span class = "hljs-number" > 23< / span > cabb< span class = "hljs-number" > 1< / span > a< span class = "hljs-number" > 63752e5< / span > a< span class = "hljs-number" > 760< / span > f< span class = "hljs-number" > 47252545< / span > b< span class = "hljs-number" > 7< / span > cda< span class = "hljs-number" > 933< / span > afeaf< span class = "hljs-number" > 06< / span > dba< span class = "hljs-number" > 3< / span > b< span class = "hljs-number" > 6< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 6< / span > fd< span class = "hljs-number" > 5356781< / span > f< span class = "hljs-number" > 240< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 2750< / span > --contractInfo < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 07803e32< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 12e100905< / span > e< span class = "hljs-number" > 8< / span > d< span class = "hljs-number" > 69< / span > fe< span class = "hljs-number" > 38< / span > ae< span class = "hljs-number" > 72< / span > f< span class = "hljs-number" > 2e7< / span > a< span class = "hljs-number" > 17< / span > eb< span class = "hljs-number" > 7< / span > b< span class = "hljs-number" > 8< / span > dc< span class = "hljs-number" > 1< / span > a< span class = "hljs-number" > 9< / span > bce< span class = "hljs-number" > 134< / span > b< span class = "hljs-number" > 0< / span > cbe< span class = "hljs-number" > 920< / span > fa< span class = "hljs-number" > 0860100000000005< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 58e41254< / span > e< span class = "hljs-number" > 7< / span > a< span class = "hljs-number" > 117< / span > ee< span class = "hljs-number" > 1< / span > db< span class = "hljs-number" > 59874< / span > f< span class = "hljs-number" > 2334< / span > facc< span class = "hljs-number" > 1576< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 238< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 16< / span > d< span class = "hljs-number" > 18767< / span > b< span class = "hljs-number" > 47861< / span > f< span class = "hljs-number" > 93< / span > f< span class = "hljs-number" > 7< / span > < span class = "hljs-keyword" > c< / span > < span class = "hljs-number" > 0000000000000000< / span > --collateral < span class = "hljs-number" > 40000< / span > --locktime < span class = "hljs-number" > 1666720< / span > --refundlocktime < span class = "hljs-number" > 1666730< / span > --feerate < span class = "hljs-number" > 3< / span >
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< / code > < / pre >
< p > This will return a nice pretty-printed JSON offer. To get an offer that can be sent to the counter-party, add the < code > --escaped< / code > flag to the end of this command.< / p >
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< h4 > < a class = "anchor" aria-hidden = "true" id = "accepting-the-offer-1" > < / a > < a href = "#accepting-the-offer-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Accepting The Offer< / h4 >
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< p > Upon receiving a DLC Offer from your counter-party, the following command will create the serialized accept message:< / p >
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< pre > < code class = "hljs css language-bashrc" > .< span class = "hljs-regexp" > /app/< / span > cli< span class = "hljs-regexp" > /target/u< / span > niversal< span class = "hljs-regexp" > /stage/< / span > bitcoin-s-cli acceptdlcoffer --offer [offer] --escaped
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< / code > < / pre >
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< h4 > < a class = "anchor" aria-hidden = "true" id = "signing-the-dlc-1" > < / a > < a href = "#signing-the-dlc-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Signing The DLC< / h4 >
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< p > Upon receiving a DLC Accept message from your counter-party, the following command will generate all of your signatures for this DLC:< / p >
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< pre > < code class = "hljs css language-bashrc" > .< span class = "hljs-regexp" > /app/< / span > cli< span class = "hljs-regexp" > /target/u< / span > niversal< span class = "hljs-regexp" > /stage/< / span > bitcoin-s-cli signdlc --accept [accept] --escaped
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< / code > < / pre >
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< h4 > < a class = "anchor" aria-hidden = "true" id = "adding-dlc-signatures-to-your-database-1" > < / a > < a href = "#adding-dlc-signatures-to-your-database-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Adding DLC Signatures To Your Database< / h4 >
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< p > Upon receiving a DLC Sign message from your counter-party, add their signatures to your database by:< / p >
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< pre > < code class = "hljs css language-bashrc" > .< span class = "hljs-regexp" > /app/< / span > cli< span class = "hljs-regexp" > /target/u< / span > niversal< span class = "hljs-regexp" > /stage/< / span > bitcoin-s-cli adddlcsigs --sigs [sign]
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< / code > < / pre >
< p > You are now fully setup and can generate the fully signed funding transaction for broadcast using< / p >
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< pre > < code class = "hljs css language-bashrc" > .< span class = "hljs-regexp" > /app/< / span > cli< span class = "hljs-regexp" > /target/u< / span > niversal< span class = "hljs-regexp" > /stage/< / span > bitcoin-s-cli getdlcfundingtx --eventid [eventid]
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< / code > < / pre >
< p > where the < code > eventid< / code > is in all but the messages other than the DLC Offer message, and is also returned by the < code > adddlcsigs< / code > command.< / p >
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< h3 > < a class = "anchor" aria-hidden = "true" id = "step-4-executing-the-dlc-1" > < / a > < a href = "#step-4-executing-the-dlc-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Step 4: Executing the DLC< / h3 >
< h4 > < a class = "anchor" aria-hidden = "true" id = "execute-1" > < / a > < a href = "#execute-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Execute< / h4 >
< p > Upon receiving an oracle signature, you can execute the DLC unilaterally with< / p >
< pre > < code class = "hljs css language-bashrc" > .< span class = "hljs-regexp" > /app/< / span > cli< span class = "hljs-regexp" > /target/u< / span > niversal< span class = "hljs-regexp" > /stage/< / span > bitcoin-s-cli executedlc --eventid [eventid] --oraclesig [sig]
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< / code > < / pre >
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< p > which will return fully signed Contract Execution Transaction for the event signed by the oracle.< / p >
< h4 > < a class = "anchor" aria-hidden = "true" id = "refund-1" > < / a > < a href = "#refund-1" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Refund< / h4 >
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< p > If the < code > refundlocktime< / code > for the DLC has been reached, you can get the fully-signed refund transaction with< / p >
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< pre > < code class = "hljs css language-bashrc" > .< span class = "hljs-regexp" > /app/< / span > cli< span class = "hljs-regexp" > /target/u< / span > niversal< span class = "hljs-regexp" > /stage/< / span > bitcoin-s-cli executedlcrefund --eventid [eventid]
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< / code > < / pre >
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< / span > < / div > < / article > < / div > < div class = "docLastUpdate" > < em > Last updated on 2020-11-6 by Chris Stewart< / em > < / div > < div class = "docs-prevnext" > < a class = "docs-prev button" href = "/docs/wallet/address-tagging" > < span class = "arrow-prev" > ← < / span > < span > Address and UTXO tagging< / span > < / a > < a class = "docs-next button" href = "/docs/wallet/wallet-rescan" > < span > Wallet Rescans< / span > < span class = "arrow-next" > →< / span > < / a > < / div > < / div > < / div > < nav class = "onPageNav" > < ul class = "toc-headings" > < li > < a href = "#executing-a-discreet-log-contract-dlc" > Executing A Discreet Log Contract (DLC)< / a > < / li > < li > < a href = "#step-1-get-bitcoin-s-setup" > Step 1: Get Bitcoin-S Setup< / a > < / li > < li > < a href = "#step-2-agree-on-contract-terms" > Step 2: Agree On Contract Terms< / a > < / li > < li > < a href = "#using-the-gui" > Using the GUI< / a > < ul class = "toc-headings" > < li > < a href = "#step-3-setup-the-dlc" > Step 3: Setup The DLC< / a > < / li > < li > < a href = "#step-4-executing-the-dlc" > Step 4: Executing the DLC< / a > < / li > < / ul > < / li > < li > < a href = "#using-the-cli" > Using the CLI< / a > < ul class = "toc-headings" > < li > < a href = "#step-3-setup-the-dlc-1" > Step 3: Setup The DLC< / a > < / li > < li > < a href = "#step-4-executing-the-dlc-1" > Step 4: Executing the DLC< / a > < / li > < / ul > < / li > < / ul > < / nav > < / div > < footer class = "nav-footer" id = "footer" > < section class = "sitemap" > < a href = "/" class = "nav-home" > < img src = "/img/favicon.ico" alt = "bitcoin-s" width = "66" height = "58" / > < / a > < div > < h5 > Docs< / h5 > < a href = "/docs/en/getting-started" > Getting Started< / a > < a href = "/docs/en/core/core-intro" > Guides< / a > < a href = "/api/org/bitcoins" > API Reference< / a > < / div > < div > < h5 > Community< / h5 > < a href = "/en/users.html" > User Showcase< / a > < a href = "https://join.slack.com/t/suredbits/shared_invite/zt-eavycu0x-WQL7XOakzQo8tAy7jHHZUw" target = "_blank" rel = "noreferrer noopener" > Slack< / a > < a href = "https://gitter.im/bitcoin-s-core/" > Gitter chat< / a > < / div > < div > < h5 > More< / h5 > < a href = "https://github.com/bitcoin-s/bitcoin-s" > GitHub< / a > < a class = "github-button" href = "https://github.com/bitcoin-s/bitcoin-s" data-icon = "octicon-star" data-count-href = "/bitcoin-s/bitcoin-s-core/stargazers" data-show-count = "true" data-count-aria-label = "# stargazers on GitHub" aria-label = "Star this project on GitHub" > Star< / a > < / div > < / section > < section class = "copyright" > Copyright © 2020 Suredbits & the bitcoin-s developers< / section > < / footer > < / div > < script type = "text/javascript" src = "https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js" > < / script > < script >
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