Approvals allowances and revocation

EN source master · P03-L04 · needs_review

Offline/read-only study only. Never provide secrets, passwords or authentication codes. No wallet connection, real approval, live revocation, transaction signature, transfer, funds or trade. Visuals are specifications only.

Permissions are asset/spender/context-specific. A zero allowance can support a useful finding while other tokens and signed authorizations remain unresolved.

Name the complete tuple

ERC-20 describes allowance, approve and transferFrom semantics [ERC20]. A permission row needs network, token, owner, spender and observation context. A different token is a different permission even when the displayed spender is identical.

Read state rather than session labels

R1/R3 show the same tuple at two stipulated contexts. R2 shows a UI disconnect; it does not describe a token-contract state change. A requested revoke, submitted action and resulting state would be separate evidence stages. R3 is provided offline; the learner must not send a live revocation.

R4 concerns TOKEN-B and cannot be merged into TOKEN-A's row. Reporting only the reassuring zero while omitting the other row would lose material scope. Preserve both values and explain which question each answers.

Keep signed authorizations unresolved where needed

A permit has separate signature/nonce/deadline semantics under the applicable contract rules [PERMIT]. R5 deliberately omits its relationship to the current nonce/consumption state. One zero allowance does not establish that every outstanding signature is invalidated. The required follow-up is the applicable rules and relevant state, not another live classroom transaction.

An allowance state also does not reverse a prior transfer or establish that an owner never exposed recovery material. Permission inventory and signing-capability exposure are distinct research questions.

State narrow results

OBSERVED: fixture values and session status. INFERRED: selected-tuple change from 100 to zero. UNKNOWN: complete permission inventory and R5 viability. INSUFFICIENT EVIDENCE: “all assets are safe.” A bounded conclusion names the selected tuple at H12 and leaves the separate rows unresolved.

• Allowance: scoped permission value.
• Spender: applicable authorization role.
• Revocation evidence: resulting permission state at context.
• Coverage: permission rows actually supplied.

ILLUSTRATIVE cards. R1 SIM-N/TOKEN-A/OWNER-X/SPENDER-Y at SIM-H10 allowance 100 whole fixture units. R2 UI disconnected at T1. R3 same tuple H12 allowance 0. R4 TOKEN-B/same owner/spender H12 allowance 80. R5 TOKEN-A permit summary with current nonce/consumption relationship UNKNOWN. No real approval, signature or transaction.

Tuple/context matrix. R1→R3 is a selected comparison; R4 stays 80, R5 unknown. Put R2 in a session row with no automatic onchain-state edge.

Selected fixture states and scoped comparison.

Live revocation, complete permission reset, invalidation of all permits, reversal of loss or guaranteed safety.

• Disconnect called revoke.
• One zero generalized to every token.
• Zero state assumed to cancel every signature.

Build R1/R3/R4 permission rows. Explain R2 and R5's limits. Rewrite ‘disconnect and zero makes every asset safe.’

Submit a table and bounded conclusion using only supplied offline material. Editorial time allocation: study 12 min, exercise 8 min, correction/quiz 10 min.

• Complete tuple/context.
• Session and state separated.
• Requests and outcomes separated.
• Different tokens kept distinct.
• Outstanding-signature gaps named.

A permission finding is contextual. Disconnection and one zero allowance do not establish comprehensive authorization reset or asset safety.

• Inspect spender amount and revocation limits
• Read complete allowance tuples and contexts.
• Bound one zero state without claiming all authorizations reset.

P03-L05 after prerequisite and correction review.

NONE in authoritative catalog. Provided offline data suffice; no product purchase or wallet operation required.

• [ERC20] ERC-20 token standard — approve, allowance and transferFrom for compliant interfaces.
• [PERMIT] ERC-2612 signed approvals — Permit allowance authorization with owner, spender, value, nonce and deadline.

Documentation explains mechanisms. Historical records retain their declared source class. Source inspection is not independent editorial acceptance.