hardhat/dist/src/internal/builtin-plugins/network-manager/utils/apply-coverage-network-overrides.js

Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

/**
 * Returns a copy of the resolved EDR network config with coverage-specific
 * overrides applied. When coverage is enabled and the user has not set the
 * field explicitly:
 *
 * - `allowUnlimitedContractSize` defaults to `true`, because coverage
 *   instrumentation can push the contract size over the limit.
 * - `blockGasLimit` and `transactionGasCap` default to `false` (disabled),
 *   so the added gas of coverage instrumentation does not push tests over
 *   the per-block or EIP-7825 transaction caps.
 *
 * Explicit user values are preserved in all three cases.
 *
 * When coverage is disabled, the config is returned unchanged.
 */
export function applyCoverageNetworkOverrides(config, shouldEnableCoverage) {
    if (!shouldEnableCoverage) {
        return config;
    }
    return {
        ...config,
        allowUnlimitedContractSize: config.allowUnlimitedContractSize ?? true,
        blockGasLimit: config.blockGasLimit ?? false,
        transactionGasCap: config.transactionGasCap ?? false,
    };
}
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