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Add up-front fees to funding tx and make funding fees proportional

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Nadav Kohen
2019-12-17 15:45:20 -06:00
committed by GitHub
parent e74ef2ad0b
commit 2c8ed47311
1 changed files with 8 additions and 8 deletions
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Transactions.md
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@@ -33,12 +33,12 @@ Where
* Remote Change ScriptPubKey
Where
- `P2WSH(DLC Funding Output)`'s value is `Total Local Collateral + Total Remote Collateral`
- `P2WSH(DLC Funding Output)`'s value is `Total Local Collateral + Total Remote Collateral + Computed CET Fee`
- `DLC Funding Output`'s script is
OP_2 <Local Funding Public Key> <Remote Funding Public Key> OP_2 OP_CHECKMULTISIG
- Each `Change ScriptPubKey`'s value is at most that of its respective `Sum(Funding Inputs) - Total Collateral - Computed Fees` with `Computed Fees` being equal for both parties
- Each `Change ScriptPubKey`'s value is at most that of its respective `Sum(Funding Inputs) - Total Collateral - Computed Fees - (Computed CET Fee/2)` with `Computed Fees` being proportional to each party's total input weight and `Computed CET Fee` being the estimated fee for a [Contract Execution Transaction](#contract-execution-transaction)
## Contract Execution Transaction
### <a name="CETKnownValues">Known Values</a>
@@ -68,9 +68,8 @@ Where
* ToRemoteOutput
Where
- `P2WSH(ToLocalOutput).value = Local Payout - Local Fee`
- `ToRemoteOutput.value = Remote Payout - Remote Fee`
- `Local Fee = Remote Fee`
- `P2WSH(ToLocalOutput).value = Local Payout`
- `ToRemoteOutput.value = Remote Payout`
- `ToLocalOutput`'s script is:
OP_IF
@@ -97,6 +96,7 @@ Where
* Fee Rate: `FeeUnit`
Where
- Unlike any other transaction in a DLC, there is only one Refund Transaction that both parties share
- Both `Refund Public Key`s are 33-byte compressed public keys
- `Total Local Collateral + Total Remote Collateral = (DLC Funding Output).value`
- `DLC Funding Output` is of the form [specified above](#FundingOutputs)
@@ -109,9 +109,9 @@ Where
* ToRemoteOutput
Where
- `ToLocalOutput`'s value is `Total Local Collateral - Local Fee`
- `ToRemoteOutput`'s value is `Total Remote Collateral - Remote Fee`
- `Local Fee / Total Local Collateral = Remote Fee / Total Remote Collateral`
- `ToLocalOutput`'s value is `Total Local Collateral + RefundFeeDelta/2`
- `ToRemoteOutput`'s value is `Total Remote Collateral + RefundFeeDelta/2`
- `RefundFeeDelta = Computed CET Fee - Computed Refund Tx Fee` (note that the Refund Transaction is smaller than any CET)
- `ToLocalOutput`'s script is:
OP_0 <Hash160(Local Refund Public Key)>