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A. Glossary of Terms (concise)

  • BizToken — Generic name for an onchain token managed within the Bitsave ecosystem.
  • BizShare — The onchain token representing a specific BizFi instrument (in current implementation, primarily tokenized debt units).
  • BizSwap — Protocol-managed, liquidity-gated exit mechanism for debt BizShares (early-exit swap with flat exit fee).
  • SPV — Special Purpose Vehicle (Bitsave Smart Limited) — the legal entity that holds offchain custody, signs agreements with businesses, and bridges funds between offchain and onchain.
  • EAS — Ethereum Attestation Service — onchain attestation layer used to anchor dataHash references linking offchain documents to onchain business records.
  • SaveFi — Bitsave’s savings product; user deposits in SaveFi determine investors’ permitted BizFi participation via the 100× multiplier.
  • BizFi — The business-finance vertical of Bitsave that structures, funds, and manages tokenized financial instruments for real-world businesses.

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B. Mathematical Annex (formulas & worked examples)

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B.1 Key constants (current design)

  • Principal per BizShare unit: P=$100P = \$100
  • Quarterly yield: rq=4%=0.04r_q = 4\% = 0.04
  • Annualized yield (approx): rann=16%r_{ann} = 16\%
  • Duration: T=12T = 12weeks (≈ 90 days)
  • Payout cadence: weekly (12 payouts)
  • BizSwap flat exit fee: f=10%=0.10f = 10\% = 0.10 (applies to the original principal amount, not the remaining value)
  • BizSwap fee split: LP share = 20% of exit fee; Treasury share = 80% of exit fee

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B.2 Formulas

  1. Total interest for term I=P×rqI = P \times r_q
  2. Total repayment value V=P+I=P×(1+rq)V = P + I = P \times (1 + r_q)
  3. Weekly amortized payout (equal payments) WeeklyPayout=VT\text{WeeklyPayout} = \frac{V}{T}
  4. Remaining scheduled value after (w) weeks R(w)=V−w×WeeklyPayoutR(w) = V - w \times \text{WeeklyPayout}
  5. Exit fee ExitFee(w)=P×f\text{ExitFee}(w) = P \times f
  6. Net exit payout (received when exiting at week (w)) NetExit(w)=P−(w×WeeklyPayout)−ExitFee(w)\text{NetExit}(w) = P - (w \times \text{WeeklyPayout}) - \text{ExitFee}(w)
  7. Total realized value for investor who had already received (w) weekly payments then exited TotalRealized(w)=w×WeeklyPayout+NetExit(w)\text{TotalRealized}(w) = w \times \text{WeeklyPayout} + \text{NetExit}(w)
  8. Fee split LPshare=ExitFee×0.20,Treasuryshare=ExitFee×0.80{LP}_\text{share} = \text{ExitFee} \times 0.20, \quad \text{Treasury}_\text{share} = \text{ExitFee} \times 0.80

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B.3 Worked numeric example (baseline constants)

  • P=100P=100
  • rq=0.04r_q=0.04 → I=100×0.04=4I=100 \times 0.04 = 4
  • V=104V = 104
  • T=12T=12 → Weekly payout =10412≈8.6666667= \dfrac{104}{12} \approx 8.6666667 (rounded display $8.66)
Exit after 5 weeks (example in context):
  • Amount already collected: 5×8.6666667=43.33333355 \times 8.6666667 = 43.3333335 ≈$43.33\approx\$43.33
  • Calculated Refund: 100−43.3333335=56.6666665100 - 43.3333335 = 56.6666665 ≈$56.67\approx\$56.67
  • Exit fee: 100×0.10=10100 \times 0.10 = 10 ≈$10.00\approx\$10.00
  • Net exit payout: 56.6666665−10=46.666666556.6666665 - 10 = 46.6666665 ≈$46.67\approx\$46.67
  • Total realized (collected + exit): 43.3333335+46.6666665=9043.3333335 + 46.6666665 = 90 ≈$90.00\approx\$90.00