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New "Halfway RingCT" outputs for coinbase transactions

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When RingCT is enabled, outputs from coinbase transactions
are created as a single output, and stored as RingCT output,
with a fake mask. Their amount is not hidden on the blockchain
itself, but they are then able to be used as fake inputs in
a RingCT ring. Since the output amounts are hidden, their
"dustiness" is not an obstacle anymore to mixing, and this
makes the coinbase transactions a lot smaller, as well as
helping the TXO set to grow more slowly.

Also add a new "Null" type of rct signature, which decreases
the size required when no signatures are to be stored, as
in a coinbase tx.
This commit is contained in:
moneromooo-monero 2016-08-12 18:45:07 +01:00
parent 6f526cdff8
commit c3b3260ae5
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
19 changed files with 120 additions and 36 deletions
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9
src/ringct/rctTypes.h
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@ -174,8 +174,9 @@ namespace rct {
// outPk contains public keypairs which are destinations (P, C),
// P = address, C = commitment to amount
enum {
RCTTypeFull = 0,
RCTTypeSimple = 1,
RCTTypeNull = 0,
RCTTypeFull = 1,
RCTTypeSimple = 2,
};
struct rctSigBase {
uint8_t type;
@ -189,6 +190,8 @@ namespace rct {
BEGIN_SERIALIZE()
FIELD(type)
if (type == RCTTypeNull)
return true;
// FIELD(message) - not serialized, it can be reconstructed
// FIELD(mixRing) - not serialized, it can be reconstructed
if (type == RCTTypeSimple)
@ -224,6 +227,8 @@ namespace rct {
BEGIN_SERIALIZE_OBJECT()
FIELDS(*static_cast<rctSigBase *>(this))
if (type == RCTTypeNull)
return true;
FIELDS(p);
END_SERIALIZE()
};