Sprout → Sapling
Pirate introduced Sapling in December 2018. A potential vulnerability in Sprout’s original proof system raised inflation concerns. All funds were required to cross a public turnstile to the new Sapling pool by 15 February 2019 before remaining Sprout funds were locked to ensure no counterfeit coins existed on chain.
SproutWithdrawal
TurnstileTransparent hop
SaplingShielded again
Sprout Supply Check
Sprout supply39,630,014.62129248
−Still in Sprout1,294,335.32384994
=Turnstile migration38,335,679.29744254
All public outflows accounted for
Migration evidence
Withdrawals
2Transactions · both legs
4Turnstile (ARRR)
34.79018888Withdrawal fees (ARRR)
0.0002#178974↩ Returned to Sprout
Sprout withdrawala5e051a6e60d…0123cca934.60547084 ARRR
→ Output #0 →Spending transactionf050290cc7c7…7783abf2#178981
#155386↩ Returned to Sprout
Sprout withdrawal80b82f9ec4af…aed75bdf0.18491804 ARRR
→ Output #0 →Spending transaction00e71f530dc7…df395c92#155396
