@lodestar/beacon-node
Version:
A Typescript implementation of the beacon chain
52 lines • 1.91 kB
JavaScript
import { blockToHeader } from "@lodestar/state-transition";
import { GENESIS_SLOT } from "../../../../constants/index.js";
import { rootHexRegex } from "../../../../eth1/provider/utils.js";
import { ApiError, ValidationError } from "../../errors.js";
export function toBeaconHeaderResponse(config, block, canonical = false) {
return {
root: config.getForkTypes(block.message.slot).BeaconBlock.hashTreeRoot(block.message),
canonical,
header: {
message: blockToHeader(config, block.message),
signature: block.signature,
},
};
}
export function resolveBlockId(forkChoice, blockId) {
blockId = String(blockId).toLowerCase();
if (blockId === "head") {
return forkChoice.getHead().blockRoot;
}
if (blockId === "genesis") {
return GENESIS_SLOT;
}
if (blockId === "finalized") {
return forkChoice.getFinalizedBlock().blockRoot;
}
if (blockId === "justified") {
return forkChoice.getJustifiedBlock().blockRoot;
}
if (blockId.startsWith("0x")) {
if (!rootHexRegex.test(blockId)) {
throw new ValidationError(`Invalid block id '${blockId}'`, "blockId");
}
return blockId;
}
// block id must be slot
const blockSlot = parseInt(blockId, 10);
if (Number.isNaN(blockSlot) && Number.isNaN(blockSlot - 0)) {
throw new ValidationError(`Invalid block id '${blockId}'`, "blockId");
}
return blockSlot;
}
export async function getBlockResponse(chain, blockId) {
const rootOrSlot = resolveBlockId(chain.forkChoice, blockId);
const res = typeof rootOrSlot === "string"
? await chain.getBlockByRoot(rootOrSlot)
: await chain.getCanonicalBlockAtSlot(rootOrSlot);
if (!res) {
throw new ApiError(404, `Block not found for id '${blockId}'`);
}
return res;
}
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