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Try it Live

Run Hardfork examples in the interactive playground

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    Operator-Style API

    gte mimics the >= operator for clearer code: 
    import { CANCUN, LONDON } from 'tevm'

// Operator-style (reads like >= operator)
if (CANCUN.gte(LONDON)) {
  // ...
}

// Equivalent semantic form
if (CANCUN.isAtLeast(LONDON)) {
  // ...
}

    ​
    Usage Patterns

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    Feature Gating

    import { Hardfork, LONDON } from 'tevm'

const fork = Hardfork(config.hardfork)

if (fork.gte(LONDON)) {
  // EIP-1559 available
}

    ​
    Network Configuration

    import { Hardfork, SHANGHAI } from 'tevm'

function validateVersion(fork: BrandedHardfork) {
  if (!fork.gte(SHANGHAI)) {
    throw new Error("Requires Shanghai or later")
  }
}

    ​
    Chronological Ordering

    Uses chronological deployment order: 
    FRONTIER (0) < HOMESTEAD (1) < ... < CANCUN (16) < PRAGUE (17)

    ​
    Performance

    Time Complexity: O(1) - Array index comparison Typical Time: ~10-20ns per call

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    See Also

    • isAtLeast - Semantic equivalent
    • gt - Strictly greater than
    • lte - Less than or equal