@metamask/keyring-utils/dist/scopes.mjs

MetaMask Keyring utils

import { KnownCaipNamespace } from "@metamask/utils";
// We do not use the `EthScope` from `@metamask/keyring-api` here to avoid pulling it
// as a dependency.
export const ETH_SCOPE_EOA = `${KnownCaipNamespace.Eip155}:0`;
// We use a string prefix when comparing EOAs to avoid unecessary splits.
const ETH_SCOPE_PREFIX = `${KnownCaipNamespace.Eip155}:`;
/**
 * Check if scope matches another scope. It also supports the special
 * case of `eip155:0` for EVM EOA chain ID which is compatible with any EVM chain
 * ID (`eip155:*`).
 *
 * @param scope - The scope (CAIP-2 chain ID) to check.
 * @param other - Another scope to compare to.
 * @returns True if both scope are compatible, false otherwise.
 */
export function isScopeEqual(scope, other) {
    const isScopeEoa = scope === ETH_SCOPE_EOA;
    const isOtherEoa = other === ETH_SCOPE_EOA;
    // Special case for EOA scopes (we check on both sides).
    if (isScopeEoa) {
        return other.startsWith(ETH_SCOPE_PREFIX);
    }
    if (isOtherEoa) {
        return scope.startsWith(ETH_SCOPE_PREFIX);
    }
    // Normal case, if both scopes strictly match, then they are compatible.
    return scope === other;
}
/**
 * Check if `scope` matches any scope from `scopes`. It also supports the special
 * case of `eip155:0` for EVM EOA chain ID which is compatible with any EVM chain
 * ID (`eip155:*`).
 *
 * @param scope - The scope (CAIP-2 chain ID) to check.
 * @param scopes - The list of scopes to check against.
 * @returns True if `scope` matches any scope from `scopes`, false otherwise.
 */
export function isScopeEqualToAny(scope, scopes) {
    return scopes.some((other) => isScopeEqual(scope, other));
}
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