OP_CHECKCOLORVERIFY: soft-fork for native color coin support

TierNolan

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Activity: 1232

Merit: 1094

Quote from: Peter Todd on July 12, 2013, 08:37:35 AM

Anyway with MASTs that step can be just a matter of optional blockchain compression.

That's true, the "real" script could be the expanded version. If a client finds a particular sequence of bytes repeating in script, then it could have some way tell its peers about it.

Peter Todd

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Activity: 1120

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"merkelized abstract syntax tree" == "abstract syntax tree + hashing"

You only provide the parts of the tree actually executed, take advantage of that.

Making transactions as statefull as you suggest - depending on external data for the scripts - has many severe drawbacks due to the non-determinism and complexity. Anyway with MASTs that step can be just a matter of optional blockchain compression.

TierNolan

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Activity: 1232

Merit: 1094

Quote from: Peter Todd on July 12, 2013, 08:23:38 AM

TierNolan: learn about merkelized abstract syntax trees.

There is no Google hit for "merkelized abstract syntax tree"

However, a syntax tree is basically the root of a tree of instructions. Do you mean that you give the root node of a tree that defines the operations?

I don't see that as an improvement. You still need to provide the entire script when spending the coin?

What I was suggesting was a way to add code for functions.

Maybe

OP_CALL

is a better description. That would call the given function.

Peter Todd

legendary

Activity: 1120

Merit: 1152

TierNolan: learn about merkelized abstract syntax trees.

TierNolan

legendary

Activity: 1232

Merit: 1094

Quote from: Peter Todd on July 12, 2013, 07:37:53 AM

The issue is it trades off small scripts for a whole lot of effort creating code for colored coins; this code will need to be duplicated across many different bitcoin implementations. Frankly that's just not worth it.

What about some way to define custom opcodes then.

OP_META

A special transaction could define an to

Topic: OP_CHECKCOLORVERIFY: soft-fork for native color coin support (Read 3608 times)