squid-js/src/utils/ConversionTypeHelpers.ts

import { LoggerInstance } from "./Logger"

// Ox transformer
export const zeroX = (input: string) => zeroXTransformer(input, true)
export const noZeroX = (input: string) => zeroXTransformer(input, false)
export function zeroXTransformer(input: string = "", zeroOutput: boolean) {
    const {valid, output} = inputMatch(input, /^(?:0x)*([a-f0-9]+)$/i, "zeroXTransformer")
    return (zeroOutput && valid ? "0x" : "") + output
}

// did:op: transformer
export const didPrefixed = (input: string) => didTransformer(input, true)
export const noDidPrefixed = (input: string) => didTransformer(input, false)
export function didTransformer(input: string = "", prefixOutput: boolean) {
    const {valid, output} = inputMatch(input, /^(?:0x|did:op:)*([a-f0-9]{64})$/i, "didTransformer")
    return (prefixOutput && valid ? "did:op:" : "") + output
}

// 0x + did:op: transformer
export const didZeroX = (input: string) => zeroX(didTransformer(input, false))

// Shared functions
function inputMatch(input: string, regexp: RegExp, conversorName: string): {valid: boolean, output: string} {
        if (typeof input !== "string") {
        LoggerInstance.debug("Not input string:")
        LoggerInstance.debug(input)
        throw new Error(`[${conversorName}] Expected string, input type: ${typeof input}`)
    }
        const match = input.match(regexp)
        if (!match) {
        LoggerInstance.warn(`[${conversorName}] Input transformation failed.`)
        return {valid: false, output: input}
    }
        return {valid: true, output: match[1]}
}