check for and display simplicity transaction inputs

[philippem]

• on liquid chains, provide additional information when a transaction input is a simplicity program
• display program in base64 (not hex)

[imaginator]

+1 on this change. @philippem demoed it earlier to me and it looks great.

[delta1]

LGTM untested

[apoelstra]

utACK 3b31283

Though eventually we should pull this stuff back into the API rather than doing Javascript parsing.

[roconnor-blockstream]

utACK

[shesek]

Looks great! Only some minor comments

[shesek]

Though eventually we should pull this stuff back into the API rather than doing Javascript parsing.

This would be useful to have in the API, but perhaps behind a verbose/extended flag? It would result in larger JSONs due data getting duplicated in both the witness and the new fields parsed out of it, which could be avoided for clients that don't require it.

[philippem]

Though eventually we should pull this stuff back into the API rather than doing Javascript parsing.

This would be useful to have in the API, but perhaps behind a verbose/extended flag? It would result in larger JSONs due data getting duplicated in both the witness and the new fields parsed out of it, which could be avoided for clients that don't require it.

agree

[roconnor-blockstream]

In the backend we can and maybe should do much more Simplicity parsing.

[Randy808]

Can we do something to give this operation more semantic meaning? Ex:

function hasSimplicityTapleafVersion(controlBlock) {
return controlBlock.startsWith('be') || controlBlock.startsWith('bf');
}

[philippem]

good suggestion, added in subsequent commit