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Merge pull request #17 from lightningnetwork/funding-created-single-byte-outindex

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BOLT 2: Only single byte for channel-index.
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Rusty Russell 2016-11-24 12:42:36 +10:30 committed by GitHub
commit 0dd4583db1
1 changed files with 8 additions and 3 deletions
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02-peer-protocol.md
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@ -197,14 +197,19 @@ signature, it will broadcast the funding transaction.
2. data:
* [8:temporary-channel-id]
* [32:txid]
* [2:output_index]
* [1:output-index]
* [1:pad]
* [64:signature]
#### Requirements
The sender MUST set `temporary-channel-id` the same as the `temporary-channel-id` in the `open_channel` message. The sender MUST set `txid` to the transaction ID to a non-malleably transaction, which it MUST NOT broadcast, and MUST set `output_index` to output number of that transaction which corresponds the funding transaction output as defined in [BOLT #3](03-transactions.md#funding-transaction-output), and MUST set `signature` to the valid signature using its `funding-pubkey` for the initial commitment transaction as defined in [BOLT #3](03-transactions.md#commitment-transaction).
The sender MUST set `temporary-channel-id` the same as the `temporary-channel-id` in the `open_channel` message. The sender MUST set `txid` to the transaction ID to a non-malleably transaction, which it MUST NOT broadcast, and MUST set `output-index` to output number of that transaction which corresponds the funding transaction output as defined in [BOLT #3](03-transactions.md#funding-transaction-output), MUST set `pad` to zero, and MUST set `signature` to the valid signature using its `funding-pubkey` for the initial commitment transaction as defined in [BOLT #3](03-transactions.md#commitment-transaction).
The recipient MUST fail the channel if `signature` is incorrect.
The recipient MUST fail the channel if `signature` is incorrect, and MUST ignore `pad`.
#### Rationale
The `output-index` can only be 1 byte, since that's how we'll pack it into the channel-id used throughout the protocol. The limit of 255 outputs should not be overly burdensome.
### The `funding_signed` message