TxContext

@totemsdk/kissvm

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@totemsdk/kissvm / TxContext

Interface: TxContext

Context supplied to the evaluator describing the spend transaction

Properties

block

block: number

Current block height

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blockMilli?

optional blockMilli?: number

Current block timestamp in milliseconds

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inputIndex

inputIndex: number

Index of the input coin being evaluated

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inputs

inputs: CoinData[]

All input coins

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mastBranches?

optional mastBranches?: Map<string, string>

MAST branch resolution: maps hashHex (lowercase, 0x-prefixed) → scriptText. The spender reveals the branch they are executing here. Key = '0x' + sha3_256(UPPER(trim(scriptText)))

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outputs

outputs: OutputData[]

All output coins

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prevCoins?

optional prevCoins?: CoinData[]

Previous input coins for SAMECOINS check. If not provided SAMECOINS returns true (simulation default).

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prevState

prevState: Record<number, string>

Previous state from the spent coin

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simulationMode?

optional simulationMode?: boolean

When true, SIGNEDBY/CHECKSIG accept signature presence without verifying against a txDigest. Use ONLY for unit-testing script logic. Never set in production or in simulateSpend — those paths always compute a real txDigest and run full WOTS verification.

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state

state: Record<number, string>

Current state (port → encoded string value)

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txDigest?

optional txDigest?: Uint8Array<ArrayBufferLike>

32-byte transaction digest for signature verification