Questions tagged [hash-time-locked-contract]
The hash-time-locked-contract tag has no usage guidance.
39
questions
0
votes
1answer
27 views
Why, how, and when should an intermediate LN node terminate/resolve its HTLC(s) off-chain?
I once heard an attack against LN, which was called "flood & loot": https://medium.com/blockchains-huji/flood-loot-a-systemic-attack-on-the-lightning-network-5c3dac7bba24
The 3rd step of ...
1
vote
1answer
32 views
Decode script return different value from my relative timelock
I want to lock a UTXO for 90 days.
My Binary is:
00000000010000000011101101010011
And my sequence is: 533B40
When I decode the witness script with bitcoin-cli decodescript I can see 4209491.
Where ...
0
votes
0answers
30 views
Time locked puzzle for payment in Lightning Network
Currently HTLC's timeout transaction relies on absolute timelock enforced on the script. It allows a counterparty to withdraw the money from the contract if the other party doesn't release the ...
3
votes
1answer
33 views
Lightning Network state deprecation secret keeping
When using a lightning channel, two sides are sending transactions representing the current state (or balance) between them, and for each state sent, they invalidate the previous state by sending a ...
0
votes
1answer
19 views
Simulate HTLC in regtest c-lightning
I have three nodes in regtest environment l1, l2, and l3
l1 create a channel with l2
l2 create a channel with l3
l3 create an invoice for l1.
l1 can pays it because use the route l1-l2-l3
I presume ...
1
vote
1answer
35 views
Who bears the transaction fee for settling HTLC in Lightning Network?
Given a channel that exist between Alice and Bob, where Alice wants to transfer 0.0001 BTC to Bob. Alice makes HTLC payment to Bob contingent to the secret for the payment hash within a timelock of ...
1
vote
1answer
46 views
Reuse of payment hash in Lightning Network
Suppose there exist two such payment transfer request: A transfers 1 msat to R via A->B->C->R and S transfers 5 msat to R via S->B->C->R. Let the two HTLCs be formed across both the paths ...
2
votes
2answers
82 views
Why do multihop LN payments start settling from the recipient's end?
In HTLC, after all the parties have locked their funds in the contract, claiming payment happens in a reverse way, starting with the receiver who reveals the preimage of the corresponding payment hash....
2
votes
1answer
66 views
settling timelocked contracts based on amount of time elapsed in Lightning network
Suppose in a payment route A->B->C, A desires to pay 0.01 BTC to C. It locks in 0.01 BTC with B in the HTLC having timeout period of say 2 days and B locks 0.01 BTC with C in HTLC having timeout ...
3
votes
1answer
69 views
Why does every HTLC in a commitment transaction require its own signature?
From BOLT 02 we can learn
When a node has changes for the remote commitment, it can apply them,
sign the resulting transaction (as defined in BOLT #3), and send a
commitment_signed message.
1. type: ...
0
votes
0answers
63 views
non-mandatory-script-verify-flag (Locktime requirement not satisfied) (code 64)
I'm attempting to redeem the following htlc ( the python script below ) via timeout, however the redemption tx errors out upon validation with the error below:
bitcoin.rpc.VerifyRejectedError: {'code'...
0
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0answers
64 views
How to construct and redeem a bip199 htlc with python-bitcoinlib
Playing with this script, I'd like to understand how to construct a bip199 htlc and redeem it, however this script fails on the OP_EQUALVERIFY and I can't seem to understand why. I'd like an ...
1
vote
2answers
110 views
Can someone explain how an HTLC is redeemed?
I'm looking at Bolt 3 in the Lightning rfc. My question is about how a HTLC is redeemed. Example HTLC script for reference:
# To remote node with revocation key
OP_DUP OP_HASH160 <RIPEMD160(SHA256(...
2
votes
2answers
100 views
Why do we need revocation in both the offered/received HTLC outputs and HTLC timeout/success outputs?
The witness script for the output in the HTLC success/timeout transaction is:
OP_IF
# Penalty transaction
<revocationpubkey>
OP_ELSE
`to_self_delay`
OP_CHECKSEQUENCEVERIFY
...
2
votes
1answer
81 views
Possible race condition(double spend) on HTLC-Timeout in the lightning network?
From the offered HTLC Outputs,
# To remote node with revocation key
OP_DUP OP_HASH160 <RIPEMD160(SHA256(revocationpubkey))> OP_EQUAL
OP_IF
OP_CHECKSIG
OP_ELSE
<remote_htlcpubkey> ...
3
votes
2answers
503 views
Single-hop Payment vs Multi-hop payments
I am beginner of lightning network. When i am looking roughly lightning network whitepaper, i was confused about the types of contracts used in single-hop and multi-hop.
As far as I understand, In ...
1
vote
1answer
50 views
Do HTLCs get “carried over” in the subsequent commitment transactions?
With regular commitment transactions, current transaction invalidates the previous one. This is fine, since TXs between A and B in their channel happen one after another. However, HTLCs are sort of ...
0
votes
1answer
49 views
lightning to lightning non custodial swaps [closed]
Do you know the way to freeze funds in lightning tx to implement atomic swap between two independent lightning networks?
0
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0answers
56 views
Method to create P2SH address
I am trying to create a htlc smart contract manually by writing a script and finding the hex using the btcc compiler. Now node A has to create a transaction using that hex and lock money in that p2sh ...
2
votes
1answer
75 views
HTLCs and commitment transactions
Why commitment transactions can't simply be HTLCs instead of contracts revocable by having the second half of the Revocable Private Key? I mean, why bother to create a Revocable Public Key from two ...
0
votes
1answer
102 views
BOLT #3: Shouldn't timeout be included in the script of “Offered HTLC Outputs” for the local node?
According to the BOLT #3 documentation, the offered HTLC output has the following script that allows the remote node to claim the funds with the payment pre-image and the local node to claim it after ...
1
vote
1answer
99 views
Remote node signature for HTLC-success and HTLC-timeout transactions
According to BOLT #3, when constructing a HTLC output in the version of the local node (both received and offered HTLC), it requires that the payment to the local node is locked with CHECKMULTISIG ...
0
votes
1answer
31 views
How multiple unfinished payments in single LN channel work?
I think I understand HTLCs, at least if they are on chain. I also have a basic understanding of how off chain channel looks like.
I understand it as follows. It is a 2-of-2 multisig transaction ...
2
votes
2answers
190 views
Why do we use CLTV instead of CSV in the HTLC output of the commitment transaction?
In lightning network commitment transactions, the HTLC offered/received outputs generally pay the offering node after a timeout which is scripted using CLTV. In other parts of the commitment ...
0
votes
1answer
97 views
Implement HTLC manually by writing scripts
Is there any way to implement HTLC manually for locking funds in the channels in lightning network for a period of time (by setting intervals) and releasing the funds after the time lock expired using ...
0
votes
1answer
61 views
How can I create HTLCs below dust_limit_satoshi in Lightning Network?
BOLT#2 documentation for open_channel message has two points (dust_limit_satoshi and htlc_min_msat) in the data message that I found confusing. Below is the statement related to dust_limit_satoshi:
...
7
votes
3answers
2k views
“HTLCs don't work for micropayments”?
I read this tweet by Tadge Dryja recently. What exactly did he mean? Is this an issue? If so, is this issue fixable?
0
votes
1answer
40 views
Destination address(es) when redeeming an HTLC
Starting from this text at https://en.bitcoin.it/wiki/Script:
"The script for a typical Bitcoin transfer to destination Bitcoin address D simply encumbers future spending of the bitcoins with two ...
3
votes
1answer
66 views
In which cases could I find funds locked in a failed route?
I received an invoice from node Z and my node (A) suggests me 4 possible routes.
If the first two routes fail, are there cases in which funds can get stuck in one of these routes until the HTLC ...
1
vote
1answer
57 views
Security implications of removing CHECKSIG in a test
If I conduct an htlc transaction on testnet that does not include OP_CHECKSIG will it still cost an attacker more than (say) $10 in processing power or storage to subvert my tests?
Details: I'm ...
1
vote
1answer
121 views
What is the relation between a Hash Time Lock Contract(HTLC) and a Commitment transaction?
I want to know about what happens to the commitment transactions as the HTLC's are sent and cleared along to peers in a route.
0
votes
1answer
226 views
How to perform atomic swap Bitcoin-Litecoin
I am running Bitcoin and Litecoin nodes fully synced on testnet.Can I perform atomic swapping by using this networks?
I heard it can be done through HTLC(Hash Time Locked Contracts). How can I do ...
2
votes
1answer
340 views
Basic questions about lightning network HTLC
I'm reading about lightning and I have a few questions:
The HTLC contract seems to be different at each new path payment channel is opened (due to a different Hash value that needs to be provided), ...
0
votes
0answers
20 views
Hash Time Locked Contract (HTLC) using bitcoin-qt [duplicate]
Is it possible to manually create a Hash Time Locked Contract using the bitcoin-qt command line?
I have dabbled with manually creating createrawtransaction / sendrawtransaction using the bitcoin-qt ...
5
votes
2answers
2k views
HTLC (Hash Time Lock Contract) using bitcoin-qt
Is it possible to manually create a HTLC using the bitcoin-qt command line?
I know how to manually creating createrawtransaction/sendrawtransaction using the bitcoin-qt clients command line, and ...
2
votes
1answer
527 views
Lightning Network: hashlocks vs private keys exchange
I am reading the Lightning Network paper and noticed that when describing bidirectional payment channels, the authors used "Breach Remedy transactions" and the exchange of the two parties' private ...
1
vote
1answer
182 views
Do HTLC transactions work today or do they need a new soft-fork?
I thought that HTLCs were just a kind of a script construct that would allow to unlock funds for a period of time, which can be unlocked to anyone that provides the original string that matches the ...
7
votes
1answer
2k views
What is a hash pre-image as it is used for the breach remedy?
Until this afternoon I thought the anti-cheat transactions or breach remedies built on the exit-transaction of the counterparty.
Apparently, they build on something called a "hash pre-image". What is ...
9
votes
1answer
1k views
How is a node in the middle prohibited from keeping the money in a routed Payment in Lightning network?
It is my understanding that Lightning is to scale with users having only few payment channels by leveraging the six degrees of separation theory to facilitate payment routing. I understand how onion ...
