1+ import { Address } from "viem"
2+ import { encodeAddress } from "@polkadot/util-crypto" ;
3+ import { ss58Address } from "@polkadot-labs/hdkd-helpers" ;
4+ import { hexToU8a } from "@polkadot/util" ;
5+ import { blake2AsU8a , decodeAddress } from "@polkadot/util-crypto" ;
6+ import { Binary } from "polkadot-api" ;
7+ import { SS58_PREFIX } from "./config"
8+
9+ export function toViemAddress ( address : string ) : Address {
10+ let addressNoPrefix = address . replace ( "0x" , "" )
11+ return `0x${ addressNoPrefix }
12+ }
13+
14+ export function convertH160ToSS58 ( ethAddress : string ) {
15+ // get the public key
16+ const hash = convertH160ToPublicKey ( ethAddress ) ;
17+
18+ // Convert the hash to SS58 format
19+ const ss58Address = encodeAddress ( hash , SS58_PREFIX ) ;
20+ return ss58Address ;
21+ }
22+
23+ export function convertPublicKeyToSs58 ( publickey : Uint8Array ) {
24+ return ss58Address ( publickey , SS58_PREFIX ) ;
25+ }
26+
27+ export function convertH160ToPublicKey ( ethAddress : string ) {
28+ const prefix = "evm:" ;
29+ const prefixBytes = new TextEncoder ( ) . encode ( prefix ) ;
30+ const addressBytes = hexToU8a (
31+ ethAddress . startsWith ( "0x" ) ? ethAddress : `0x${ ethAddress }
32+ ) ;
33+ const combined = new Uint8Array ( prefixBytes . length + addressBytes . length ) ;
34+
35+ // Concatenate prefix and Ethereum address
36+ combined . set ( prefixBytes ) ;
37+ combined . set ( addressBytes , prefixBytes . length ) ;
38+
39+ // Hash the combined data (the public key)
40+ const hash = blake2AsU8a ( combined ) ;
41+ return hash ;
42+ }
43+
44+ export function ss58ToEthAddress ( ss58Address : string ) {
45+ // Decode the SS58 address to a Uint8Array public key
46+ const publicKey = decodeAddress ( ss58Address ) ;
47+
48+ // Take the first 20 bytes of the hashed public key for the Ethereum address
49+ const ethereumAddressBytes = publicKey . slice ( 0 , 20 ) ;
50+
51+ // Convert the 20 bytes into an Ethereum H160 address format (Hex string)
52+ const ethereumAddress = '0x' + Buffer . from ( ethereumAddressBytes ) . toString ( 'hex' ) ;
53+
54+ return ethereumAddress ;
55+ }
56+
57+ export function ss58ToH160 ( ss58Address : string ) : Binary {
58+ // Decode the SS58 address to a Uint8Array public key
59+ const publicKey = decodeAddress ( ss58Address ) ;
60+
61+ // Take the first 20 bytes of the hashed public key for the Ethereum address
62+ const ethereumAddressBytes = publicKey . slice ( 0 , 20 ) ;
63+
64+
65+ return new Binary ( ethereumAddressBytes ) ;
66+ }
67+
68+ export function ethAddressToH160 ( ethAddress : string ) : Binary {
69+ // Decode the SS58 address to a Uint8Array public key
70+ const publicKey = hexToU8a ( ethAddress ) ;
71+
72+ // Take the first 20 bytes of the hashed public key for the Ethereum address
73+ // const ethereumAddressBytes = publicKey.slice(0, 20);
74+
75+
76+ return new Binary ( publicKey ) ;
77+ }
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