RFC: hybrid solo/donation pool mode

[plebhash]

a new potential feature for SRI Pool after #135 materializes

OpenExtendedMiningChannel.user_identity is a string with the following pattern:

sri/donate/10/tb1qa0sm0hxzj0x25rh8gw5xlzwlsfvvyz8u96w3p8/worker01

sri magic bytes indicate this is following SRI convention, followed by these fields:

Field	Example	Description
mode	donate	Mining mode: donate or solo
donation_percentage	10	(donate mode only) Percentage of block rewards donated to SRI community wallet (1-99). Omitted for full donation
payout_address	tb1qa0sm0hxzj0x25rh8gw5xlzwlsfvvyz8u96w3p8	Bitcoin address for mining payouts. Omitted for full donation
worker_name	worker01	(optional) Worker name for device-level monitoring

Patterns:

• partial donation: sri/donate/donation_percentage/payout_address/worker_name
• full donation: sri/donate/worker_name
• solo: sri/solo/payout_address/worker_name

Partial donation:

• [donation_percentage] % of block rewards goes to SRI community wallet (coming from config file)
• [100 - donation_percentage] % of block reward goes to payout_address

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some more examples of valid pattern combinations:

user_identity	Description
sri/donate/5/bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq	5% to SRI community wallet, 95% to payout address
sri/donate/50/bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4/rig-03	50/50 split, with worker identification
sri/solo/bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4/worker01	pure solo mode, 100% to payout address, with worker name
sri/solo/bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4	solo mode, no worker name
sri/donate	full donation, 100% to SRI community wallet
sri/donate/worker01	full donation with worker identification

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while crafting NewExtendedMiningJob or NewMiningJob, SRI Pool leverages channels_sv2 APIs to set a coinbase with two outputs according to the string under user_identity

[plebhash]

under this proposed schema, #135 could follow sri/solo/payout_address format

[GitGab19]

This is a very interesting approach, thanks @plebhash for proposing it!

[plebhash]

in a far future, whenever SRI Pool has actual pooled mining functionality (e.g.: PPLNS), we could then introduce pooled mode (as an alternative to donate and solo)