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Transaction proposal protocol
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| transaction_proposal: { | |
| raw, | |
| xpubs[], | |
| m, | |
| input_metadata: [ | |
| { | |
| input_transaction, // (optional for participants with no access to the blockchain) | |
| path || paths[], | |
| sighash_type (defaults to SIGHASH_ALL) | |
| } || null | |
| ], | |
| output_metadata: [ | |
| { | |
| path || paths[] | |
| } || null | |
| ] | |
| } |
I believe we don't need to include redeemScripts in metadata - they can just be in the properly formatted scriptSigs. OP_0 SIG1 SIG2 REDEEM where SIG1 / SIG2 are replaced with OP_0 if not yet populated.
+1 on the redeem script not being necessary
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Advantage of including master public keys in each tx proposal is that the participants don't have to store them as state. This also reduces privacy leaks if a participant is compromised.
The disadvantage of including them is that the tx proposal now becomes more sensitive and might need to protect it more than we would otherwise.