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schema: implement authorizer handlers
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import { Address, Bytes, crypto, log, store } from '@graphprotocol/graph-ts' | ||
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import { Permission, PermissionParam } from '../types/schema' | ||
import { Authorized, Unauthorized, Authorizer as AuthorizerContract } from '../types/templates/Authorizer/Authorizer' | ||
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export function handleAuthorized(event: Authorized): void { | ||
let permissionId = getPermissionId(event.address, event.params.who, event.params.where, event.params.what) | ||
let permission = new Permission(permissionId) | ||
permission.authorizer = event.address.toHexString() | ||
permission.who = event.params.who.toHexString() | ||
permission.where = event.params.where.toHexString() | ||
permission.what = event.params.what.toHexString() | ||
permission.save() | ||
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let authorizerContract = AuthorizerContract.bind(event.address) | ||
let getPermissionParamsCall = authorizerContract.try_getPermissionParams( | ||
event.params.who, | ||
event.params.where, | ||
event.params.what | ||
) | ||
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if (getPermissionParamsCall.reverted) { | ||
log.warning('getPermissionParams() call reverted for authorizer {}', [event.address.toHexString()]) | ||
return | ||
} | ||
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let params = getPermissionParamsCall.value | ||
for (let i: i32 = 0; i < params.length; i++) { | ||
let paramId = permissionId + '/param/' + i.toString() | ||
let param = new PermissionParam(paramId) | ||
param.op = parseOp(params[i].op) | ||
param.value = params[i].value.toHexString() | ||
param.save() | ||
} | ||
} | ||
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export function handleUnauthorized(event: Unauthorized): void { | ||
let permissionId = getPermissionId(event.address, event.params.who, event.params.where, event.params.what) | ||
let permission = Permission.load(permissionId) | ||
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if (permission != null) { | ||
let params = permission.params.load() | ||
for (let i: i32 = 0; i < params.length; i++) store.remove('PermissionParam', params[i].id) | ||
store.remove('Permission', permissionId) | ||
} | ||
} | ||
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function parseOp(op: i32): string { | ||
if (op == 0) return 'NONE' | ||
if (op == 1) return 'EQ' | ||
if (op == 2) return 'NEQ' | ||
if (op == 3) return 'GT' | ||
if (op == 4) return 'LT' | ||
if (op == 5) return 'GTE' | ||
if (op == 6) return 'LTE' | ||
return 'Unknown' | ||
} | ||
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function getPermissionId(authorizer: Address, who: Address, where: Address, what: Bytes): string { | ||
return crypto.keccak256( | ||
Bytes.fromHexString( | ||
authorizer.toHexString() + | ||
who.toHexString().slice(2) + | ||
where.toHexString().slice(2) + | ||
what.toHexString().slice(2), | ||
), | ||
).toHexString() | ||
} |
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