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Adapt length encoding

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This commit is contained in:
Simon Warta 2022-08-30 13:34:46 +02:00
parent 97f39df4e7
commit b968aae644
1 changed files with 23 additions and 10 deletions
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33
packages/cli/examples/contract_addresses.ts
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@ -1,29 +1,42 @@
import { fromBech32, fromUtf8, toAscii, toBech32, toHex, toUtf8 } from "@cosmjs/encoding";
import { Random, Sha256, sha256 } from "@cosmjs/crypto";
import { Uint64 } from "@cosmjs/math";
import { Uint53, Uint64 } from "@cosmjs/math";
/**
* The "Basic Address" Hash from
* https://github.com/cosmos/cosmos-sdk/blob/v0.45.8/docs/architecture/adr-028-public-key-addresses.md
*/
function hash(type: Uint8Array, key: Uint8Array): Uint8Array {
return new Sha256(sha256(type)).update(key).digest();
function hash(type: string, key: Uint8Array): Uint8Array {
return new Sha256(sha256(toAscii(type))).update(key).digest();
}
/**
* Takes an integer [0, 255] and returns a one-byte encoding of it.
*/
function toUint8(int: number): number {
const checked = new Uint53(int).toNumber();
if (checked > 255) {
throw new Error("Integer exceeds uint8 range");
}
return checked;
}
/** See https://github.com/CosmWasm/wasmd/issues/942 */
function deterministicContractAddress(codeId: number, creator: string, label: string, prefix: string) {
const codeIdUint64 = Uint64.fromNumber(codeId);
const creatorData = fromBech32(creator).data;
const creatorDataLen = Uint64.fromNumber(creatorData.length);
const labelData = toUtf8(label);
const key1 = new Uint8Array([
const key = new Uint8Array([
...toAscii("wasm"),
0x00,
...codeIdUint64.toBytesBigEndian(),
...creatorDataLen.toBytesBigEndian(),
toUint8(creatorData.length),
...creatorData,
...toUtf8(label),
toUint8(labelData.length),
...labelData,
]);
const key2 = new Uint8Array([...toAscii("wasm"), 0x00, ...key1]);
const addressData = hash(toAscii("module"), key2);
const addressData = hash("module", key);
return toBech32(prefix, addressData);
}
@ -34,7 +47,7 @@ function makeRandomAddress(length: number): string {
let out: Array<any> = [];
for (let codeId of [1, Number.MAX_SAFE_INTEGER]) {
for (let creator of [makeRandomAddress(20), makeRandomAddress(32)]) {
for (let creator of [makeRandomAddress(20), makeRandomAddress(32)]) {
for (let label of ["instance 1", "instance 2"]) {
const contractAddress = deterministicContractAddress(codeId, creator, label, "purple");